FCC ID: 2BAGU-LEETOPSUBKIT Leetop sub kit-608

User Guide Leetop_A08_Carrier_ Board_ User_Guide_V1.2 Leetop Technology (Shenzhen) Co., Ltd.. http://www.leetop.top Leetop Tech Co., Ltd. Leetop_A608_Carrier_ Board__User_Guide_V1.2 Notice Service and Support Technical Support Warranties Warranty content:

DOCUMENT CHANGE HISTORY Carrier Board specifications Interface Location External Interface Interface details DC Power Input Jack (W1) DP Connect W2 Double layer USB3.0 (W3) 1G network port+USB3.2 (W4/W5) Type C Connect (W6) RTC Battary Connector (W7) LED Indicator(W8) FAN CONW9) Speaker Con (W10) Speaker Con (W11) Speaker Signal feedback con (W32) Analog Microphone conW33 Analog Microphone conW34) Audio Jack Interface (W12) Power KeyW13 CANW14) IIC Interface (W15) UART Con (W16 UART Con(W17) Multifunctional expansion port(W18) MCU download interface(W19) Multifunctional expansion port(W20) Camera Con(W21) Camera Con(W22) NVIDIA Orin NX/Orin NANO core module interface(W23) M.2 KEY E(W24) Recovery Key(W25) Reset Key (W26) 5V UART Con(W27) Multifunctional interface(W28) SIM card holder(W29) M.2 KEY_B(W30) M.2 KEY M(W31) Module Installation and Removal Function Introduction Operating system setup 1.Hardware preparation 2.Environment requirements 3.Recovery mode 4.Install system image 5.Switching working modes 6. Install Jetpack components 002 Leetop Tech Co., Ltd. Leetop_A608_Carrier_ Board__User_Guide_V1.2 Use of xshell System Configuration View System Version Make a backup image Installation of Jtop tools Access to Solid State Drives Developer Tools JetPack L4T DeepStream SDK on Jetson Isaac SDK Key features of Jetpack Sample Applications Developer Tools Abbreviations and Definitions 003 Notice Please read manual carefully before install, operate, or transport Leetop device. Ensure that the correct power range is being used before powering the device. Avoid hot plugging. To properly turn off the power, please shut down the Ubuntu system first, and then cut off the power. Due to the particularity of the Ubuntu system, on the Nvidia developer kit, if the power is turned off when the startup is not completed, there will be a 0.03% probability of abnormality, which will cause the device to fail to start. Due to the use of the Ubuntu system, the same problem also exists on the Leetop device. Do not use cables or connectors other than described in this manual. Do not use Leetop device near strong magnetic fields. Backup your data before transportation or Leetop device is idle. Recommend to transport Leetop device in its original packaging. Warn! This is a Class A product, in a living environment this product may cause radio interference. In this case, the user may be required to take practicable measures against the interference. Working in a high temperature environment for a long time, it is not recommended to touch the shell to avoid burns. ESD Warning Electronic components and circuits are sensitive to ElectroStatic Discharge (ESD). When handling any circuit board assemblies including Leetop Tech COM Express carrier assemblies, it is recommended that ESD safety precautions be observed. ESD safe best practices include, but are not limited to

: Leaving circuit boards in their antistatic packaging until they are ready to be installed. Using a grounded wrist strap whe handling circuit boards, at a minimum you should touch a grounded metal object to dissipate any static charge that may be present on you. Only handling circuit boards in ESD sa areas, which may include ESD floor and table mats, wrist strap stations and ESD safe lab coats. Avoidin handling circuit boards in carpeted areas. Try t handle the board by the edges, avoiding contact with components. 004 Service and Support Technical Support Leetop is glad to help you with any questions you may have about our product, or about the use of the technology for your application. The fastest way is sending us an email: service@leetop.top Warranties Warranty period: One year from the date of delivery. Warranty content:

Leetop warrants the product manufactured by us to be free from defects in material and workmanship during warranty period. Please contact service@leetop.top for return material authorization (RMA) prior to returning any items for repair or exchange. The product must be returned in its original packaging to prevent damage during shipping. Before returning any product for repair, it is recommended to back up your data and delete any confidential or personal data. DOCUMENT CHANGE HISTORY Document Version date Description of Change Leetop_A608 V1.0 V1.1 V1.2 20230912 Initial release 20231012 USB change 20231214 005 Carrier Board specifications Feature A608 Carrier for NVIDIA Jetson Orin NX/Orin NANO Module Compatibility NVIDIA Jetson Orin NX/Orin NANO PCB Size / Overall Size 101.5mm x 95mm Display Ethernet USB M.2 KEY M Camera FAN RTC CON CAN Audio Function CON 1x DP 2x Gigabit Ethernet (10/100/1000) 4x USB 3.2 Type A (Integrated USB 2.0) 1x USB 2.0+3.2 Type C 1x M.2 KEY M(SSD Interface 1X M.2 KEY E(WIFI) Interface 1XM.2 KEY B(4G/5G) Interface 2X 4 CSI Camera 1 x FAN(5V PWM) 1X3.0V RTC 1x CAN (FD) 1x3.5 Audio Jack 2X MIC 2X SPEAKER 1X SPEAKER FEEDBACK 2X IIC;

1X SPI 7X IO 3.3V 2x UART 1X DEBUG 1X POWER 1X RESET 1X RECOVERY Power Requirements

+9--+20V(MAX 60W) DC Input Operating Temperature

-25 to +65 Weight 0.9970KG Warranty and Support 1 Year Warranty and Free Support 006 Interface Location Leetop_A608_Carrier_Board_V1.2 007 External Interface Designator Connector Description W1 W2 W3 DC Jack CON_DCPWR_JACK_006_TH_RA_100X130 DP Connect CON_6.65mm_DP_020_3VD51207-D7JJ-7H USB 3.2 Connect USB3.0 AF double layer 90 degree short body, gold-plated pins 5AU, 19 PIN, HIGH 13.62MM W4/W5 RJ45 Connect CONN MAGJACK 1P TD NPOE 10G LED W6 W7 W8 W9 TYPE C ( 2.0+3.2) CON_USB3_TYPEC_30PIN_0.5MM RTC Connect CON_1.5MM_2P_SMD battery holder LED indicator 5V FAN Connect 1.25MMPITCH_4PIN_SMD_MOLEX W10/W11 Speaker con CON_1.5MM_2P_SMD W12 W13 W14 W15 W16 W17 W18 W19 W20 Audio Jack 3.5 Earphone stand PJ-31060A POWER KEY CON, GH1.25_WT_2P CAN Connect CON, GH1.25_WT_2P IIC Connect CON, GH1.25_WT_4P UART Connect CON, GH1.25_WT_4P UART Connect CON, GH1.25_WT_4P Multifunctional expansion port CON, GH1.25_WT_9P A1253WT09B MCU download interface CON_2X2_2.54_SMD Multifunctional expansion port ZIF_0.5PITCH_8P_2MM W21/W22 CAMERA Connect ZIF_0.5PITCH_22P_2MM NVIDIA Orin NX/Orin W23 NANO core module TE 2309413-1 interface W24 W25 W26 W27 W28 W29 W30 M2_KEY_EWIFI) CON_067_M2_KEY_E_C RECOVERY KEY GH1.25_WT_2P RESET KEY GH1.25_WT_2P UART Connect GH1.25_WT_4P Multifunctional interface GH1.25_WT_9P SIM card holder SIM-12707H137 M2_KEY_B(4G/5G) CON_067_M2_KEY_B_30X42_52 008 Designator Connector Description W31 W32 W33 W34 M2_KEY_M(SSD) CON_067_SMT_M2_KEY_M Speaker signal feedback GH1.25_WT_4P Analog Microphone GH1.25_WT_2P Analog Microphone GH1.25_WT_2P 009 Interface details DC Power Input Jack (W1) PIN 1 Signal Name PIN Signal Name Positive power supply 2.3.4.5.6 GND After the power is plugged in and turned on normally, the power LED lights up (red) Note: Power input range: DC+9V-20V (MAX 60W) DP Connect W2 PIN Signal Name PIN Signal Name 1 3 5 7 9 11 13 15 17 19 DP_CON_LANE0_P DP_CON_LANE0_N GND DP_CON_LANE2_P DP_CON_LANE2_N GND DP_MODE DP_CON_AUX_P DP_CON_AUX_N GND 2 4 6 8 10 12 14 16 18 20 GND DP_CON_LANE1_P DP_CON_LANE1_N GND DP_CON_LANE3_P DP_CON_LANE3_N HDMI_CEC_CON GND DP_HPD_CON VDD_3V3_DP 010 Double layer USB3.0 (W3) PIN Signal Name PIN Signal Name 1 3 5 7 9 11 13 15 17 VBUS USB 2.0 D+

SSRX-

GND SSTX+

USB 2.0 D-

GND SSRX+

SSTX-

2 4 6 8 10 12 14 16 18 USB 2.0 D-

GND SSRX+

SSTX-

VBUS USB 2.0 D+

SSRX-

GND SSTX+

1G network port+USB3.2 (W4/W5) PIN Signal Name PIN Signal Name 1 3 5 7 9 VDD_5V0_IO_SYS_1 USB_DP USB_SSRX_N GND USB_SSTX_P 2 4 6 8 USB_DN GND USB_SSRX_P USB_SSTX_N PIN Signal Name PIN Signal Name 1 3 5 7 TP0+

TP1+

TP2-

TP3+

Type C Connect (W6) 2 4 6 8 TP0-

TP2+

TP1-

TP3-

011 PIN Signal Name PIN Signal Name A4, A9, B4, B9 5V VBUS A1, A12, B1, B12 A5 A8 B10 A3 A10 B3 GND CC1 NC SSRX1-

SSTX1-

SSRX2-

SSTX2-

B5 B8 B11 A2 A11 B2 CC2 NC SSRX1+

SSTX1+

SSRX2+

SSTX2+

USB0_P A7, B7 U.SB D-

A6.B6 RTC Battary Connector (W7) PIN 1 Signal Name B+

PIN 2 Signal Name GND LED Indicator(W8) Red represents the power indicator light. FAN CONW9) PIN Signal Name PIN Signal Name 1 3 GND FAN_TACH Speaker Con (W10) PIN 1 Signal Name SPO_RN Speaker Con (W11) PIN 1 Signal Name SPO_LN Speaker Signal feedback con (W32) 2 4 PIN 2 PIN 2 VDD_5V FAN_PWM Signal Name SPO_RP Signal Name SPO_LP PIN Signal Name PIN Signal Name 1 3 SPO_LP SPO_RP 2 4 SPO_LN SPO_RN Analog Microphone conW33 012 PIN 1 Signal Name GND Analog Microphone conW34) PIN 1 Signal Name GND Audio Jack Interface (W12) PIN 2 PIN 2 Signal Name Micro+(IN2) Signal Name Micro+(IN3) Signal Name PIN Signal Name PIN 1 3 5.7 NC GND AUD_HP_JD Power KeyW13 PIN 1 Signal Name GND CANW14) PIN 1 Signal Name CAN_L IIC Interface (W15) 2 4 6 PIN 2 PIN 2 IN1D_P HPO_R HPO_L Signal Name PWR_BTN Signal Name CAN_H PIN Signal Name PIN Signal Name 1 4 GND ID_I2C_SCL 2 5 3.3V ID_I2C_SDA UART Con (W16 PIN Signal Name PIN Signal Name 1 3 GND UART1_TXD_3V3 2 4 VDD_3V3_SYS UART1_RXD_3V3 UART Con(W17) PIN Signal Name PIN Signal Name 1 3 GND UART0_TXD_3V3 2 4 VDD_3V3_SYS UART0_RXD_3V3 013 Multifunctional expansion port(W18) PIN Signal Name PIN Signal Name 1 3 5 7 9 GND VDD_5V_SYS GPIO_12_3V3 I2C1_SDA GPIO_09_3V3 MCU download interface(W19) VDD_3V3_SYS SPI1_MISO_3V3 I2C1_SCL GPIO_11_3V3 2 4 6 8 10 PIN Signal Name PIN Signal Name 1 3 C2D GND 2 4 C2K ACOK Note: PIN4 (ACOK) and PIN3 (GND) can be turned off and automatically turned on when powered on due to a short circuit. Multifunctional expansion port(W20) PIN Signal Name PIN Signal Name 1 3 5 7 PIN112_INT I2C2_SDA PIN104_RST GND Camera Con(W21) 2 4 6 8 I2C2_SCL PIN110_PRO GND VDD_1V8 014 PIN Signal Name PIN Signal Name 1 3 5 7 9 11 13 15 17 19 21 VDD_3V3_SYS CAM0_I2C_SCL CAM0_MCLK GND CSI1_D1_N CSI1_D0_P GND CSI0_CLK_N CSI0_D1_P GND CSI0_D0_N 2 4 6 8 10 12 14 16 18 20 22 CAM0_I2C_SDA GND CAM0_PWDN_LS CSI1_D1_P GND CSI1_D0_N CSI0_CLK_P GND CSI0_D1_N CSI0_D0_P GND Camera Con(W22) PIN Signal Name PIN Signal Name 1 3 5 7 9 11 13 15 17 19 21 VDD_3V3_SYS CAM1_I2C_SCL CAM1_MCLK GND CSI3_D1_N CSI2_D0_P GND CSI2_CLK_N CSI2_D1_P GND CSI2_D0_N 2 4 6 8 10 12 14 16 18 20 22 CAM1_I2C_SDA GND CAM1_PWDN_LS CSI3_D1_P GND CSI2_D0_N CSI2_CLK_P GND CSI2_D1_N CSI2_D0_P GND NVIDIA Orin NX/Orin NANO core module interface(W23) 260PIN connector, mainly used for NVIDIA Jetson Orin NX/NANO core module and Connection between Leetop_ A608 carrier plates M.2 KEY E(W24) 015 PIN Signal Name PIN Signal Name 1 3 5 7 9 11 13 15 17 19 21 23 25 27 29 31 33 35 37 39 41 43 45 47 49 51 53 55 57 59 GND USB_DP USB_DN GND NC NC NC NC NC NC NC NC GND PCIE1_TX0_P PCIE1_TX0_N GND PCIE1_RX0_P PCIE1_RX0_N GND PCIE1_CLK_P PCIE1_CLK_N GND PCIE1_CLKREQ PCIE_WAKE GND NC NC GND NC NC 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50 52 54 56 58 60 VDD_3V3_SYS VDD_3V3_SYS NC I2S1_SCLK I2S1_LRCK I2S1_SDIN I2S1_SDOUT NC GND BT_M2_WAKE_AP UART0_RXD UART0_TXD UART0_CTS UART0_RTS NC NC NC NC NC NC SUSCLK_32KHZ_BUF PCIE1_RST W_DISABLE2 W_DISABLE1 I2C2_SDA I2C2_SCL M2_E_ALERT NC NC NC 016 PIN Signal Name PIN Signal Name 61 63 65 67 69 GND NC NC GND GND Recovery Key(W25) PIN 1 Signal Name GND Reset Key (W26) PIN 1 Signal Name GND 5V UART Con(W27) NC VDD_3V3_SYS VDD_3V3_SYS GND 62 64 66 68 70 PIN 2 PIN 2 Signal Name RECOVER Signal Name SYS_RST PIN Signal Name PIN Signal Name 1 3 GND UART2_TXD_LS 2 4 VDD_5V_SYS UART2_RXD_LS Multifunctional interface(W28) PIN Signal Name PIN Signal Name 1 3 5 7 9 GND SPI0_MOSI_3V3 SPI0_MISO_3V3 SPI0_CS1_3V3 GPIO_07_3V3 SIM card holder(W29) 2 4 6 8 VDD_3V3_SYS SPI0_SCK_3V3 SPI0_CS0_3V3 GPIO_13_3V3 PIN Signal Name PIN Signal Name 1 3 5 7 USIM_VDD USIM_CLK GND USIM_DATA 2 4 6 8 USIM_RST USIM_DET USIM_VDD GND 017 M.2 KEY_B(W30) PIN Signal Name PIN Signal Name 1 3 5 7 9 11 21 23 25 27 29 31 33 35 37 39 41 43 45 47 49 51 53 55 57 59 61 63 65 67 NC GND GND USB_DP USB_DN GND NC NC NC GND USB_SSRX_N USB_SSRX_P GND USB_SSTX_N USB_SSTX_P GND NC NC GND NC NC GND NC NC GND NC NC NC NC RESET 2 4 6 8 10 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50 52 54 56 58 60 62 64 66 68 VDD_3V8 VDD_3V8 POWER_ON W_DISABLE1#

STATUS NC NC NC NC NC USIM_RST USIM_CLK USIM_DATA USIM_VDD NC NC NC NC NC NC NC NC NC NC NC NC NC NC USIM_DET NC 018 PIN Signal Name PIN Signal Name 69 71 73 NC GND GND M.2 KEY M(W31) 70 72 74 VDD_3V8 VDD_3V8 VDD_3V8 019 PIN Signal Name PIN Signal Name 1 3 5 7 9 11 13 15 17 19 21 23 25 27 29 31 33 35 37 39 41 43 45 47 49 51 53 55 57 59 GND GND UPHY0_RX4_N UPHY0_RX4_P GND UPHY0_TX4_N UPHY0_TX4_P GND UPHY0_RX5_N UPHY0_RX5_P GND UPHY0_TX5_N UPHY0_TX5_P GND UPHY_RX10_N UPHY_RX10_P GND UPHY_TX10_N UPHY_TX10_P GND UPHY_RX11_N UPHY_RX11_P GND UPHY_TX11_N UPHY_TX11_P GND PCIE4_CLK_N PCIE4_CLK_P GND NC 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50 52 54 56 58 60 VDD_3V3 VDD_3V3 NC NC NC VDD_3V3 VDD_3V3 VDD_3V3 VDD_3V3 NC NC NC NC NC NC NC NC NC NC I2C_GP2_CLK I2C_GP2_DAT GPIO34_M2_KEYM_ALERT NC NC PCIE4_RST_N PCIE4_CLKREQ_N PCIE_WAKE_N UFS0_REF_CLK UFS0_RST_N 32.768KHZ 020 PIN Signal Name PIN Signal Name 61 63 65 67 NC GND GND GND 62 64 66 68 VDD_3V3 VDD_3V3 VDD_3V3 GND 021 Module Installation and Removal In order to properly install the Jetson Orin NX/Orin Nano series module, please follow the following sequence and installation hardware instructions 1. The connectors should be parallel to each other when plugged. 2. Use smooth movements during docking (no mechanical impact, knocking, hammering). 3. e PCB operators. 4. The top and bottom PCBs should be connected with bolts to improve reliability. 5. Secure from the top of the module with M2 screws (4x). Torque the screws to 2.5 lb/in. If a clamp is used for mating, the clamp should hold the mated connector within 2 degrees. Additionally, the clamp should allow the connectors to become parallel as the mating process proceeds. In order to properly disassemble the Jetson Orin NX/Orin Nano series module, please follow the following sequence and installation hardware instructions. 1. The PCB design needs to have adequate finger accessibility/space requirements to hold the board for demolition. 2. Remove the mounting screws (2) from the top of the module. 3. Shake the top plate several times, no more than 3 degrees, to gradually disengage the connector. 4. Pin direction of the connector The symbol pins of the 260 pin connector on the carrier board are mirrored, so that when the module and the carrier board connectors are docked, the pin numbers are consistent (see the figure below). The direction shown in the figure matches the upright position and layout file on the carrier board. 022 Figure 023 Function Introduction Operating system setup 1.Hardware preparation Ubuntu 18.04/20.04 PC x1 Type C data cable x1 2.Environment requirements 1.Download the system image package to the PC host of the Ubuntu18.04 system:

Programming steps:

1. Use a USB cable to connect the USB Type-A of the PC of the Ubuntu18.04/20.04 system to the Type C of the Leetop_A608 Development System;

2. Power on the Leetop_A608 Development System and enter Recovery mode;

3. Open the Nvidia-SDK-Manager on the PC, as shown in the figure below, select Jetson Orin NX/Orin Nano in the interface to download the Jetpack5.xx system image package and development tools, or download the latest from https://developer.nvidia.com/embedded/do wnloads Example filesystems for the Jetson Linux distribution and the Jetson Development Kit. (Jetson Linux Driver Package (L4T) ). 4. Download the matching driver:

Link: https://pan.baidu.com/s/1fXAcDyI7n5g1VKMc4FQSSw Extraction code: oz9h

(Please download the corresponding driver files according to the actual needs of the device) 1 2

#When the corresponding version cannot be queried using the latest version of SDK, this command can be used to obtain sdkmanager --archivedeversions Please contact us for the rest of the informationservice@leetop.top 024 2. Unzip the downloaded image package and enter the Linux for Tegra(L4T) directory 1 2 3 4 5 6 7 8 9 sudo mkdir [$path] #Create a folder and freely name the path cd [$path] #Enter folder tar xf Jetson_Linux_R35.3.1_aarch64.tbz2 cd Linux_for_tegra/rootfs/

sudo tar xpf Tegra_Linux_Sample-Root-Filesystem_R35.3.1_aarch64.tbz2 cd .. sudo ./apply_binaries.sh sudo ./tools/l4t_flash_prerequisites.sh

#Replace Driver Package 10 sudo cp -r 608_xxx/Linux_for_tegra/* Linux_for_tegra/

3. Enter this command on a Linux host to install (flash) the Jetson version into the Jetson development kit. Flash to NVMe:

1 2 3 4

#orin nx/orin nano flash to nvme sudo ./tools/kernel_flash/l4t_initrd_flash.sh --external-device nvme0n1p1

-c tools/kernel_flash/flash_l4t_external.xml -p "-c bootloader/t186ref/cfg/flash_t234_qspi.xml" \

--showlogs --network usb0 jetson-orin-nano-devkit internal Flash to USB:

1 2 3 4 5

#orin nx/orin nano flash to USB cd Linux_for_tegra/

sudo ./tools/kernel_flash/l4t_initrd_flash.sh --external-device sda1 \

-c tools/kernel_flash/flash_l4t_external.xml -p "-c bootloader/t186ref/cfg/flash_t234_qspi.xml" \

--showlogs --network usb0 jetson-orin-nano-devkit internal Flash to SD:

1 2 3 4

#orin nano flash to SD sudo ./tools/kernel_flash/l4t_initrd_flash.sh --external-device mmcblk1p1

-c tools/kernel_flash/flash_l4t_external.xml -p "-c bootloader/t186ref/cfg/flash_t234_qspi.xml" \

--showlogs --network usb0 jetson-orin-nano-devkit internal 025 3.Recovery mode The system can be updated via USB, and the update needs to enter the USB Recovery mode. In USB Recovery mode, you can perform file system update, kernel update, boot loader update, BCT update and other operations. Please follow the steps in the software update manual to update the system Steps to enter Recovery Mode:

1. Turn off the system power, please ensure that the power is turned off instead of entering standby mode. 2. Use the Type C to USB Type A cable to connect the carrier and host. 3. Power up the system 4. (Press the power button as needed) While holding down the Recovery button, press and release the Reset button, wait for 2 seconds to release the Recovery button. 5. Open a terminal window on your host computer and enter command lsusb . The Jetson module is in Force Recovery Mode if you see the message:

1 Bus <bbb> Device <ddd>: ID 0955: <nnnn> Nvidia Corp. Where

= <bbb> is any three-digit number

= <ddd> is any three-digit number

<nnnn> is a four-digit number that represents the type of your Jetson module:

7023 for Jetson AGX Orin (P3701-0000 with 32GB) 7023 for Jetson AGX Orin (P3701-0005 with 64GB) 7223 for Jetson AGX Orin (P3701-0004 with 32GB) 7323 for Jetson Orin NX (P3767-0000 with 16GB) 7423 for Jetson Orin NX (P3767-0001 with 8GB) 7523 for Jetson Orin Nano (P3767-0003 and P3767-0005 with 8GB) 7623 for Jetson Orin Nano (P3767-0004 with 4GB) 7019 for Jetson AGX Xavier (P2888-0001 with 16GB) 7019 for Jetson AGX Xavier (P2888-0004 with 32GB) 7019 for Jetson AGX Xavier (P2888-0005 with 64GB) 7019 for Jetson AGX Xavier Industrial (P2888-0008) 7e19 for Jetson Xavier NX (P3668 Note:

When entering USB Recovery mode, the system will not start and there will be no debugging information output from the serial port. 026 4.Install system image a) Connect USB type-A of Ubuntu 18.04/20.04 Host to Type C of Leetop_A608;

b) Power up Leetop_A608 and enter Recovery mode(RCM);

c) The PC Host enters the L4T directory and executes the flashing instruction(Flash to NVMe) 1 2 3 4 5 cd Linux_for_tegra/

#orin nx/orin nano flash to nvme sudo ./tools/kernel_flash/l4t_initrd_flash.sh --external-device nvme0n1p1 \

-c tools/kernel_flash/flash_l4t_external.xml -p "-c bootloader/t186ref/cfg/flash_t234_qspi.xml" \

--showlogs --network usb0 jetson-orin-nano-devkit internal d) After flashing, power on Leetop_A608 again and log in to the system. 027 5.Switching working modes After logging in to the system, you can click on the operation modification in the upper right corner of the system interface, as shown in the figure Alternatively, switch by entering the following command in the terminal 1 2

#Switch to mode 0, use the -q parameter to view the current mode sudo nvpmodel -m 0 6. Install Jetpack components 1 2 3 sudo apt update sudo reboot sudo apt install nvidia-jetpack 028 Use of xshell Xshell is a powerful security terminal emulation software, it supports SSH1, SSH2, and TELNET protocol of Microsoft Windows platform. Xshell's secure connection to remote hosts through the Internet and its innovative design and features help users enjoy their work in complex network environments. Xshell can be used to access servers under different remote systems under the Windows interface, so as to better achieve the purpose of remote control of the terminal. xshell is not necessary, but it can better assist us in using equipment. It can link your Windows system with your Ubuntu system, allowing you to operate your Linux system under Windows system. To install xshell, you can download and install it by searching Baidu on the Internet. (When the product cannot enter the desktop system, you can also use xshell to perform remote control and modify configuration errors). Open Xshell Newly built 029 Fill in the name and host ip (under normal circumstances, you can connect through the network ip, if you dont know the ip, you can connect the computer and the OTG port of the device through the usb data cable, and fill in the fixed ip to connect) 1 192.168.55.1 Enter user and password 030 Click Connect to enter the command line interface Operate jetson devices remotely through xshell 031 032 System Configuration Default username: nvidia Password: nvidia NVIDIA Linux For Tegra (L4T) The motherboard supports native NVIDIA Linux For Tegra (L4T) Builds. DP, Gigabit Ethernet, USB3.0, USB, serial port, GPIO, and I2C bus are all supported and can run directly on A608 without any changes Detailed instructions and tools download linkhttps://developer.nvidia.com/embedded/jets on-linux-r3541 NVIDIA Jetpack for L4T Jetpack is a software package released by NVIDIA that contains all of the software tools needed for Orin NX/Orin Nano development using the A608, including host and target tools, including OS image files, middleware, sample applications, documentation, and more. The newly released JetPack runs on Ubuntu 20.04 Linux 64-bit hosts. It can be downloaded from the link belowhttps://developer.nvidia.com/embedded/jetpack Default configuration system Leetop_A608 uses Ubuntu 20.04 system, default username: nvidia password: nvidia Development materials and forum L4T development datahttps://developer.nvidia.com/embedded/linux-tegra Developer Forum: https://forums.developer.nvidia.com/

033 View System Version View the installed system package version 1 cat /etc/nv_tegra_release View information about the installed JetPack 1 sudo apt show nvidia-jetpack 034 Make a backup image Making a backup image needs to be done in the environment of command line flashing, only the system.img file is backed up 1. Use a USB cable to connect the USB Type-A of the PC computer of the Ubuntu18.04 system to the Type C of the Leetop_A608;

2. Power on the Leetop_A608 and enter Recovery mode;

3. Enter the Linux_for_tegra directory, and refer to README_backup_restore.txt in backup_restore for backup. Instructions for backing up the Jetson Orin Nano/Orin NX system:

1 2 3 4 5 cd Linux_for_Tegra systemctl stop udisks2.service #Automount backup restore for new external storage devices must be temporarily disabled. sudo tools/l4t_flash_prerequisites.sh #For Debian-based Linux sudo service nfs-kernel-server start sudo ./tools/backup_restore/l4t_backup_restore.sh -e nvme0n1 -b jetson-

orin-nano-devkit #Backup image, after the backup is successful, an image file will be generated under Linux_for_Tegra/tools/backup_restore. 6 sudo ./tools/backup_restore/l4t_backup_restore.sh -r jetson-orin-nano-

devkit #Backup image restoration. 4. Use the backup image to flash:

1 2 sudo ./tools/backup_restore/l4t_backup_restore.sh -r jetson-orin-nano-

devkit

#Backup image restoration If it can be flashed normally, it means that the created backup image is available. 035 Installation of Jtop tools Jtop is a system monitoring utility for Jetson that can be run on a terminal to view and control the status of NVIDIA Jetson in real time. Installation steps 1. Install pip3-tools 1 sudo apt-get install python3-pip 2. Install the jtop package with pip3 1 sudo -H pip3 install -U jetson-stats 3. Can run after reboot 1 jtop After running, as shown in the figure below 036 Access to Solid State Drives Leetop_ A608 carrier board has a standard M.2 KEY M interface, which can connect to standard M.2 KEY M devices such as 2280 size solid-state drives with PCIE interfaces. After connecting a solid-state drive, there are two ways to mount the drive to the system: one is to use tools such as Fdisk, and the other is to use command line mode. The operation steps of command line mounting are as follows:

1. Use the command lspci to check whether the recognition is successful 2. Create partition 1 2 sudo su fdisk /dev/nvme0n1 3. Create an ext4 file system 1 2 mkfs.ext4 /dev/internal

#Mkfs is the file system type 4. Mounting hard disk 1 mount -t ext4 /dev/internal nvme/

5. Set automatic mounting 1 echo /dev/internal /mnt ext4 defaults 0 0 >> /etc/fstab 037 Developer Tools JetPack NVIDIA JetPack SDK is the most comprehensive solution for building AI applications. It bundles Jetson platform software including TensorRT, cuDNN, CUDA Toolkit, VisionWorks, GStreamer, and OpenCV, all built on top of L4T with LTS Linux kernel. JetPack includes NVIDIA container runtime, enabling cloud-native technologies and workflows at the edge. JetPack SDK Cloud-Native on Jetson L4T NVIDIA L4T provides the Linux kernel, bootloader, NVIDIA drivers, flashing utilities, sample filesystem, and more for the Jetson platform. You can customize L4T software to fit the needs of your project. By following the platform adaptation and bring-up guide, you can optimize your use of the complete Jetson product feature set. Follow the links below for details about the latest software libraries, frameworks, and source packages. DeepStream SDK on Jetson NVIDIAs DeepStream SDK delivers a complete streaming analytics toolkit for AI-based multi-

sensor processing, video and image understanding. DeepStream is an integral part of NVIDIA Metropolis, the platform for building end-to-end services and solutions that transform pixel and sensor data to actionable insights. Learn about the latest 5.1..2 developer preview features in our developer news article. Isaac SDK The NVIDIA Isaac SDK makes it easy for developers to create and deploy AI-powered robotics. The SDK includes the Isaac Engine (application framework), Isaac GEMs (packages with high-

performance robotics algorithms), Isaac Apps (reference applications) and Isaac Sim for Navigation (a powerful simulation platform). These tools and APIs accelerate robot development by making it easier to add artificial intelligence (AI) for perception and navigation into robots. 038 Key features of Jetpack NVIDIA Jetson Linux 35.4.1 provides the Linux Kernel 5.10, UEFI based bootloader, Ubuntu 20.04 based root file system, NVIDIA drivers, necessary firmwares, toolchain and more.JetPack 5.1.2 includes Jetson Linux 35.4.1 which adds following highlights: (Please refer to release notes for additional details) Adds support for Jetson AGX Orin Industrial module;

Bootloader: Support for Grub as OS Loader in UEFI; Support for PXE boot;

Camera: Enhanced error resiliency for improved stability in Argus;

Support for multiple camera synchronization (sample argus_syncstereo added) Deskew calibration support for high data rate sensors (> 1.5 Gbps) Support for alternating exposures in Argus (sample OS argus_userAlternatingAutoexposure added) Multimedia: Deprecated Nvbuf_utils is removed. Refer to migration guide to migrate from Nvbuf_utils to NvUtils. Security: Support for up to 3 signing keys to sign bootloader in secure boot and ability to revoke the keys Ability to add and revoke UEFI signing keys Enhanced secure boot for encrypting kernel, kernel-dtb and initrd Support for delegated authentication with ability to sign UEFI with platform vendor owned keys Support in disk encryption for encrypting only User Data Partition (UDA) and runtime enabling encryption of UDA partitions Over The Air Updates: Support for Jetson Orin NX and Jetson Orin Nano in Image based OTA tools TensorRT is a high performance deep learning inference runtime for image classification, segmentation, and object detection neural networks. TensorRT is built on CUDA, NVIDIAs parallel programming model, and enables you to TensorRT optimize inference for all deep learning frameworks. It includes a deep learning inference optimizer and runtime that delivers low latency and high-

throughput for deep learning inference applications. JetPack 5.1.2 includes TensorRT 8.5.2 NVIDIA DLA hardware is a fixed-function accelerator engine targeted for deep learning operations. Its designed to do full hardware acceleration of convolutional neural networks, supporting various layers such as convolution, deconvolution, fully connected, activation, pooling, batch DLA normalization, and others DLA software consists of the DLA compiler and the DLA runtime stack. The offline compiler translates the neural network graph into a DLA loadable binary and can be invoked using NVIDIA TensorRT. The runtime stack consists of the DLA firmware, kernel mode driver, and user mode driver. JetPack 5.1.2 includes DLA 3.12.1 cuDNN CUDA Deep Neural Network library provides high-performance primitives for deep learning frameworks. It provides highly tuned implementations for standard routines such as forward and backward convolution, pooling, normalization, and activation layers. JetPack 5.1.2 includes cuDNN 8.6.0 039 CUDA Multimedia API Computer Vision CUDA Toolkit provides a comprehensive development environment for C and C++ developers building GPU-accelerated applications. The toolkit includes a compiler for NVIDIA GPUs, math libraries, and tools for debugging and optimizing the performance of your applications. JetPack 5.1.2 includes CUDA 11.4.19 Starting with JetPack 5.0.2, upgrade to latest and greatest CUDA releases from CUDA 11.8 onwards without the need to update Jetson Linux other JetPack components. Refer to instructions in the CUDA documentation on how to get the latest CUDA on JetPack. The Jetson Multimedia API package provides low level APIs for flexible application development. Camera application API: libargus offers a low-level frame-synchronous API for camera applications, with per frame camera parameter control, multiple (including synchronized) camera support, and EGL stream outputs. RAW output CSI cameras needing ISP can be used with either libargus or GStreamer plugin. In either case, the V4L2 media-

controller sensor driver API is used. Sensor driver API: V4L2 API enables video decode, encode, format conversion and scaling functionality. V4L2 for encode opens up many features like bit rate control, quality presets, low latency encode, temporal tradeoff, motion vector maps, and more. JetPack 5.1.2 Camera highlights include: Enhanced error resiliency for improved stability in Argus; Support for multiple camera synchronization (sample argus_syncstereo added). Deskew calibration support for high data rate sensors (> 1.5 Gbps) .Support for alternating exposures in Argus (sample argus_userAlternatingAutoexposure added) VPI (Vision Programing Interface) is a software library that provides Computer Vision / Image Processing algorithms implemented on multiple hardware accelerators found on Jetson such as PVA (Programmable Vision Accelerator), GPU, NVDEC(NVIDIA Decoder), NVENC (NVIDIA Encoder), VIC

(Video Image Compositor) and so on. OpenCV is an open source library for computer vision, image processing and machine learning. JetPack 5.1.2 includes VPI 2.3 with following highlights: New Brute Force Matcher algorithm supported on CPU and GPU backends ; New Transform Estimator algorithm supported on CPU backend. JetPack 5.1.2 includes OpenCV 4.5.4 040 Graphics JetPack 5.1.2 includes the following graphics libraries: Vulkan 1.3 (including the Roadmap 2022 Profile). Vulkan 1.3 Announcement Vulkan SC 1.0:

Vulkan SC is a low-level, deterministic, robust API that is based on Vulkan 1.2. This API enables state-of-the-art GPU-accelerated graphics and computation that can be deployed in safety-critical systems and that are certified to meet industry functional safety standards. Refer to https://www.khronos.org/vulka nsc/ for more information;Vulkan SC can also be invaluable for real-time non safety critical embedded applications. Vulkan SC increases determinism and reduces application size by shifting preparation of the run-time application environment either offline, or into application setup, as much as possible. This includes offline compilation of graphics pipelines that define how the GPU processes data, together with static memory allocation, that together enable detailed GPU control that can be rigorously specified and tested.Vulkan SC 1.0 is evolved from Vulkan 1.2 and includes: the removal of runtime functionality that is not needed in safety-critical markets, an updated design to provide predictable execution times and results, and clarifications to remove potential ambiguity in its operation. For more details see https://www.khronos.org/blog/vulkan-sc-overview Note: Jetson support for Vulkan SC is not safety certified. OpenWF Display 1.0: OpenWF Display is a Khronos API for low overhead interaction with the native display driver on Jetson and allows interaction with Vulkan SC to display images. Note:

Jetson support for OpenWF Display is not safety certified. CUDA Toolkit provides a comprehensive development environment for C and C++ developers building high-performance GPU-accelerated applications with CUDA libraries. The toolkit includes Nsight Visual Studio Code Edition, Nsight Eclipse Plugins, debugging and profiling tools including Nsight Compute, and a toolchain for cross-compiling applications NVIDIA Nsight Systems is a low overhead system-wide profiling tool, providing the insights developers need to analyze and optimize software performance. Developer NVIDIA Nsight Graphics is a standalone application for debugging and Tools profiling graphics applications. NVIDIA Nsight Deep Learning Designer is an integrated development environment that helps developers efficiently design and develop deep neural networks for in-app inference. Nsight System, Nsight Graphics, and Nsight Compute are all supported on Jetson Orin modules to assist development for autonomous machines. JetPack 5.1.2 includes NVIDIA Nsight Systems v2022.5 ;JetPack 5.1.2 includes NVIDIA Nsight Graphics 2022.6 ;JetPack 5.1.2 includes NVIDIA Nsight Deep Learning Designer 2022.2 041 Supported SDKs and Tools Cloud Native Security NVIDIA DeepStream SDK is a complete analytics toolkit for AI-based multi-

sensor processing and video and audio understanding. DeepStream 6.2 release supports JetPack 5.1.2 NVIDIA Triton Inference Server simplifies deployment of AI models at scale. Triton Inference Server is open source and supports deployment of trained AI models from NVIDIA TensorRT, TensorFlow and ONNX Runtime on Jetson. On Jetson, Triton Inference Server is provided as a shared library for direct integration with C API. PowerEstimator is a webapp that simplifies creation of custom power mode profiles and estimates Jetson module power consumption. JetPack 5.1.2 adds supports for Jetson Orin NX and Jetson Orin Nano in PowerEstimator. NVIDIA Isaac ROS is a collection of hardware-accelerated packages that make it easier for ROS developers to build high-performance solutions on NVIDIA hardware including NVIDIA Jetson. Isaac ROS DP 3.1 supports JetPack 5.1.2 Jetson brings Cloud-Native to the edge and enables technologies like containers and container orchestration. NVIDIA JetPack includes NVIDIA Container Runtime with Docker integration, enabling GPU accelerated containerized applications on Jetson platform. NVIDIA hosts several container images for Jetson on NVIDIA NGC. Some are suitable for software development with samples and documentation and others are suitable for production software deployment, containing only runtime components. Find more information and a list of all container images at the Cloud-Native on Jetson page. NVIDIA Jetson modules include various security features including Hardware Root of Trust, Secure Boot, Hardware Cryptographic Acceleration, Trusted Execution Environment, Disk and Memory Encryption, Physical Attack Protection and more. Learn about the security features by jumping to the security section of the Jetson Linux Developer guide. JetPack 5.1.2 Security highlights include: Support for up to 3 signing keys to sign bootloader in secure boot and ability to revoke the keys;Ability to add and revoke UEFI signing keys;Enhanced secure boot for encrypting kernel, kernel-dtb and initrd;Support for signing kernel modules ;Support for delegated authentication with ability to sign UEFI with platform vendor owned keys

;Support in disk encryption for encrypting only User Data Partition (UDA) and runtime enabling encryption of UDA partitions 042 Sample Applications JetPack includes several samples which demonstrate the use of JetPack components. These are stored in the reference filesystem and can be compiled on the developer kit. JetPack component Sample locations on reference filesystem TensorRT

/usr/src/tensorrt/samples/

cuDNN CUDA

/usr/src/cudnn_samples_/

/usr/local/cuda-/samples/

Multimedia API

/usr/src/tegra_multimedia_api/

VisionWorks

/usr/share/visionworks-tracking/sources/samples/

/usr/share/visionworks-sfm/sources/samples/

/usr/share/visionworks/sources/samples/

OpenCV VPI

/usr/share/OpenCV/samples/

/opt/nvidia/vpi/vpi-/samples 043 Developer Tools JetPack includes the following developer tools. Some are used directly on a Jetson system, and others run on a Linux host computer connected to a Jetson system. Tools for application development and debugging:

NSight Eclipse Edition for development of GPU accelerated applications: Runs on Linux host computer. Supports all Jetson products. CUDA-GDB for application debugging: Runs on the Jetson system or the Linux host computer. Supports all Jetson products. CUDA-MEMCHECK for debugging application memory errors: Runs on the Jetson system. Supports all Jetson products. Tools for application profiling and optimization:

NSight Systems for application multi-core CPU profiling: Runs on the Linux host computer. Helps you improve application performance by identifying slow parts of code. Supports all Jetson products. NVIDIA Nsight Compute kernel profiler: An interactive profiling tool for CUDA applications. It provides detailed performance metrics and API debugging via a user interface and command line tool. NSight Graphics for graphics application debugging and profiling: A console-grade tool for debugging and optimizing OpenGL and OpenGL ES programs. Runs on the Linux host computer. Supports all Jetson products. 044 Abbreviations and Definitions Abbreviation Definition CEC CAN DP eDP eMMC HDMI I2C I2S LDO Consumer Electronic Control Controller Area Network VESA DisplayPort (output) Embedded DisplayPort Embedded MMC High Definition Multimedia Interface Inter IC Inter IC Sound Interface Low Dropout (voltage regulator) LPDDR4x Low Power Double Data Rate DRAM, Fourth-generation PCIe (PEX) Peripheral Component Interconnect Express interface PCM PHY PMIC RTC SDIO SLVS SPI UART UFS USB Pulse Code Modulation Physical Layer Power Management IC Real Time Clock Secure Digital I/O Interface Scalable Low Voltage Signaling Serial Peripheral Interface Universal Asynchronous Receiver-Transmitter Universal Flash Storage Universal Serial Bus 045 reasonable frequency harmful FCC Warnning:

This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to part 15 of the FCC Rules. These limits are designed to provide protection againstharmful interference in a residential installation. This equipment generates, with energy uses and can radiateradio and, maycause interference the there thatinterference occur is equipment cause determined by turning the equipmentoff interference Reorient or relocate the receiving antenna. Increase the separation between the equipment and receiver. Connect the equipment into an outlet on a circuit different from that to which the receiver is harmfulinterference to radio or television reception, which can be user in communications. installation. instructions, guarantee does accordance However, this If thefollowing measures:

radio a encouraged if to in particular installed correct more used one and and will not not the on, the try no by or to to of is connected. Consult the dealer or an experienced radio/TV technician for help. Any Caution:

could void your authority to operate this equipment. modications changes this or to device not explicitly approved by manufacturer 15 part with complies device This conditions:

(1)This interference received, including interference that may cause undesired operation. interference, Operation harmful subject device device Rules. cause may and FCC this not the

(2) to of is the following two must accept any complies equipment FCC This environment. should between the radiator and your body. equipment with This radiation be installed exposure and limits operated set with forth for an minimum uncontrolled 20cm distance

Label and Location Model No.: Leetop sub kit-608 FCC ID : 2BAGU-LEETOPSUBKIT Caution : This device complies with part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) This device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation. Size: L: 4.0cm*W: 3.0cm Label and Location

Leetop Technology (Shenzhen) Co., Ltd. Unit 1706, Building A, Country Garden Phoenix Zhigu Building, No.50, Tiezai Road, Xixiang Street, Bao an District, Shenzhen, China Federal Communications Commission Authorization and Evaluation Division Equipment Authorization Branch 7435 Oakland Mills Road Columbia, MD 21046 2024/01/23 To whom it may concern:

We, Leetop Technology (Shenzhen) Co., Ltd., hereby certify that the equipment for which authorization is sought (FCC ID: 2BAGU-LEETOPSUBKIT) is not covered equipment prohibited from receiving an equipment authorization pursuant to 2.903 of the FCC rules. We also certify that, as of the date of the filing of the application, we are not identified on the Covered List (https://www foc. gov/supplychain/coveredlist) as an entity producing covered equipment. By signing this form, we confirm the above and that we are aware of the application requirements listed under 2.914(b) and (4)(5) and (6). The information provided in this letter is based on the referenced rule parts of Title 47 of the CFR as well as KDB 986446 DO1 Sincerely, Lion Tony Signature Qiong Fang Manager Leetop Technology (Shenzhen) Co., Ltd

Sincerely, Name/Title Qiong Fang/PM Company:

Address:

Leetop Technology (Shenzhen) Co., Ltd. Unit 1706, Building A, Country Garden Phoenix Zhigu Building, No.50, Tiezai Road,Xixiang Street, Bao 'an District, Shenzhen China

+86-755-23590963 N/A judy@leetop.cn Phone:

Fax:

E-Mail:

Leetop Technology (Shenzhen) Co., Ltd. Unit 1706, Building A, Country Garden Phoenix Zhigu Building, No.50, Tiezai Road Xixiang Street, Bao 'an District, Shenzhen China Date: 2024-1-27 FCC ID: 2BAGU-LEETOPSUBKIT Model Number: Leetop sub kit-608 To:

Federal Communications Commission Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD To Whom It May Concern, We, Leetop Technology (Shenzhen) Co., Ltd., declare that this EUT

(ECC ID: 2BAGU-LEETOPSUBKIT) doesnt have Ad Hoc mode function on non-US/Canada frequencies. In addition. The frequency selection feature is disabled by firmware for devices marked to the US/Canada. For DTS part of this device, only channels 1-11 will be used in North America, Country code selection is disabled. Should you have any questions or comments regarding this matter, please have my best attention. Briony Tory Name/Title: Qiong Fang/PM Company: Leetop Technology (Shenzhen) Co., Ltd. Address: Unit 1706, Building A, Country Garden Phoenix Zhigu Building, No.50, Tiezai Road, Xixiang Street, Bao an District, Shenzhen China Phone: +86-755-23590963 Fax: N/A EMail: judy@leetop.cn

Leetop Technology (Shenzhen) Co., Ltd. Unit 1706, Building A, Country Garden Phoenix Zhigu Building, No.50, Tiezai Road Xixiang Street, Bao an District, Shenzhen China Federal Communications Commission Authorization and Evaluation Division Equipment Authorization Branch 7435 Oakland Mills Road Columbia, MD 21046 2024-1-27 To whom it may concern:

We, the undersigned, hereby authorize Eurofins Product Service GmbH to act on our behaffin all matters relating to applications for equipment authorization FCC ID: 2BAGU-LEETOPSUBKIT including the signing of all documents related to these matters. Any and all acts carried out by Eurofins Product Service GmbH on our behalf shall have the same effect as acts of our own. By signing this application form, we agree to Eurofins current valid General Terms and Conditions

(AGB),Testing and Certification Regulations (PZO) which can be viewed on following website wwweurofins.de/ee or retrieved on request. We also hereby certify that no party to this application is subject to a denial of benefits, including FCC benefits, pursuant to Section 5301 of the Anti-Drug Abuse Act of 1988, 21 U.S.C. 862 Sincerely, Biony Tong Name/Title: Qiong Fang/PM Company: Leetop Technology (Shenzhen) Co., Ltd. Address: Unit 1706, Building A, Country Garden Phoenix Zhigu Building, No.50, Tiezai Road,Xixiang Street, Bao an District, Shenzhen China Phone: ++86-755-23590963, Fax: N/A E-Mail: judy@leetop.cn

Leetop Technology (Shenzhen) Co., Ltd. Unit 1706, Building A, Country Garden Phoenix Zhigu Building, No.50, Tiezai Road, Xixiang Street, Bao 'an District, Shenzhen, China Federal Communications Commission Authorization and Evaluation Division Equipment Authorization Branch 7435 Oakland Mills Road Columbia, MD 21046 U.S. Agent Designation 2024/01/23 Leetop Technology (Shenzhen) Co., Ltd. acknowledges their consent for the following contact located in the United States to act as their agent for service of process for the equipment for which authorization is sought

(FCC ID: 2BAGU-LEETOPSUBKIT):

Name and company of U.S. agent:

GSS SERVICE INC Physical U.S. address of agent:

6547 N Academy Blvd #2266 Colorado Springs COLORADO 80918 FRN of U.S. agent:

United States 0033402082 Email address of U.S. agent:

MichouxLogan@outlook.com GSS SERVICE INC acknowledges their obligation to accept service of process on behalf of Leetop Technology

(Shenzhen) Co., Ltd. Leetop Technology (Shenzhen) Co., Ltd. with the FRN [0033490475] accepts its obligation to maintain an agent for service of process in the United States for no less than one year after either the grantee has permanently terminated all marketing and importation of the applicable equipment within the U.S., or the conclusion of any Commission-related administrative or judicial proceeding involving the equipment, whichever is later. By signing this form, we confirm the above and that we are aware of the application requirements listed under 2.911(d)(7). The information provided in this letter is based on the referenced rule parts of Title 47 of the CFR as well as KDB 986446 D01. An expiration date for this letter does not exist. In case the U.S. agent changes, the grantee is obligated to notify the FCC within 30 days via the granting TCB. Sincerely, 5 0 V

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1 1 9 2 _ t n e g A _ S U

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_ 8 4 Signature Qiong Fang Manager Signature Michoux Logan PM Leetop Technology (Shenzhen) Co., Ltd. GSS SERVICE INC