IoT module DataSheet WiFi/BLE/MCU all in one FreeRTOS/Zephyr.kernel/Javascript software http://7.wrtnode.cc 2017 1. Overview wrtnode^7 is the standard module for MT7697, main feature as:
CPU: ARM Cortex M4 with FPU, up to 192MHz clock speed WiF: 802.11 b/g/n, 2.4Ghz, up to 150bmps Peripherals: UART * 2, SPI master / slave, I2C * 2, I2S, 4 * 12bit ADC, GPIO * 28, PWM * 28 Bluetooth: BLE 4.2 Storage: 32Mbite nor flash Memory: 256KB SRAM Power supply: 3.3V input Working temperature: -35 ~ 85 Wrtnode ^ 7 is a product that meets the requirements of industrial temperature scenes. MT7697 is a highly integrated Internet of things chip produced by the MTK, integrated MCU, 11n WiFi, Bluetooth, power management unit. MT7697 main parameters are as follows Power management and clock source Integrate high efficiency power management unit with single 3.3V power supply input 40/26/52MHz source crystal clock support with low power operation in idle mode Platform ARM Cortex M4 MCU with FPU with up to 192MHz clock speed Embedded 352KB SRAM and 64KB boot ROM Supports external serial flash with Quad Peripheral Interface (QPI) mode Supports eXecute In Place (XIP) on flash 32KB cache in XIP mode Hardware crypto engines including AES, DES/3DES, SHA2 for network security 28 General Purpose IOs multiplexed with other interfaces Two UART interfaces with hardware flow control and one UART for debug, all multiplexed with GPIO One SPI master interface multiplexed with GPIO One SPI slave interface multiplexed with GPIO Two I2C master interface multiplexed with GPIO One I2S interface multiplexed with GPIO Four channel 12-bit ADC multiplexed with GPIO 28 PWM multiplexed with GPIO 25 channels DMA Low power RTC mode with 32KHz crystal support WiFi Dedicated high-performance 32-bit RISC CPU N9 up to 160MHz clock speed IEEE 802.11 b/g/n compliant Supports 20MHz, 40MHz bandwidth in 2.4GHz band Single-band 1T1R mode with data rate up to 150Mbps Supports STBC, LDPC Greenfield, mixed mode, legacy modes support IEEE 802.11e support Security support for WFA WPA/WPA2 personal, WPS2.0 Supports 802.11w protected managed frames QoS support of WFA WMM Integrated LNA, PA, and T/R switch Optional external LNA and PA support. RX diversity support with additional RX input Bluetooth Bluetooth 4.2 Low Energy (LE) Integrated BALUN and PA Support SCO and eSCO link with re-transmission Channel assessment for AFH Optional Antenna Ceramic antenna Peak Gain : 0.5dbi typ S.W.R <= 2.0 @ 2400 MHz ~ 2500 MHz4.9~5.9GHz FPC antenna (connected with ipex4) Peak Gain : 4.5dbi typ S.W.R <= 2.0 @ 2400 MHz ~ 2500 MHz4.9~5.9GHz MT7697 system structure as follows:
2interface definition Module size specification (in mm, 0.15mm acceptable engineering deviation) 18 9 5
.7 3 3 2 7
.2 1 0 .3 R =
3.285 0.8 1.3 1.5 Reference Layout Pin multiplexing 2.1 RF characteristics 2.1.1 RF characteristics for 802.11b 11M Item Condition Frequency Range Tx Power Level DQPSK Frequency Tolerance Modulation Accuracy All Data Rate Item Condition Frequency Range Min Input 11Mbps PER<5%
802.11b Transmit Type Min Channal1 19
-10 20 0 5 802.11b Receiver Type Min Channal1
-76
-76 2.1.2 RF characteristics for 802.11g 54M Item Condition Frequency Range Tx Power Level DQPSK Frequency Tolerance Modulation Accuracy All Data Rate Item Condition Frequency Range Min Input 54Mbps PER<5%
802.11g Transmit Type Min Channal1 15
-10 17.5 0
-27
-29 802.11g Receiver Type Min Channal1
-65
-65 2.1.3 RF characteristics for 802.11n MCS7(HT20) Item Condition Frequency Range Tx Power Level OFDM Frequency Tolerance Modulation Accuracy All Data Rate Item Condition 802.11n Transmit Type Min Channal1 15
-10 17.5 0
-30
-31 802.11g Receiver Type Min Frequency Range Channal1 Min Input MCS7 PER<6%
-64
-64 Max Channal13 21 10 Max Channal13
-76 Max Channal13 19 10
-32 Max Channal13
-65 Max Channal13 18.5 10
-34 Max Channal13
-64 Unit dbm ppm
%
Unit dbm Unit dbm ppm Unit dbm Unit dbm ppm Unit dbm 2.1.4 RF characteristics for 802.11n MCS7(HT40) Item Condition Frequency Range Tx Power Level OFDM Frequency Tolerance Modulation Accuracy All Data Rate Item Condition 802.11g Transmit Type Min Channal1 15
-10 17.4 0
-27
-30 802.11g Receiver Type Min Frequency Range Channal1 Min Input MCS7 PER<6%
-61
-61 2.2 RF characteristics for Bluetooth LE 2.2.1 Bluetooth LE Transmitter Specification Item Description Min Frequency Range Output Power Max power output level Carrier Frequency Frequency offset and drift offset Frequency drift In-band Spurious 2M offset Emission
>3Moffset 2402
-21
-150
-50 2.2.2 Bluetooth LE Receiver Specification Item Description Frequency Range Receiver sensitivity PER<30.8%
Inter -modulation 30MHz to 2000MHz Out-of-band Blocking 2001MHz to 2339MHz 2501MHz to 3000MHz Min 2402
-50
-30
-35
-35 Type 7.29 Type
-90
-34 Max Channal13 18 10
-33 Max Channal13
-61 Max 2480 9 150 50
-49
-56 Max 2480 Unit dbm ppm Unit dbm Unit MHZ dbm KHZ KHZ dbm dbm Unit MHZ dbm KHZ dbm dbm dbm 3The Suggestion about PCB Design For the high RF performance for the end device, please note the placement for the antenna and the module.It is suggested that the module is placed along with PCB side, the antenna is placed outside the board,or along with the PCB side, and the below board is blank, please refer to the scheme 1 ;if the PCB antenna must placed on the board, please do not cover the copper at the bottom of PCB antenna,as can be shown at scheme 2. Scheme 1 This document online version http://wrtnode.cc/node7.html, please check the latest version online. Scheme 2 1 Example 1. Wi-Fi station mode.
- Find your Wi-Fi access point settings: Before connecting to a Wi-Fi access point, the following information needs to be collected:
-# The SSID of your Wi-Fi access point.
-# The authentication mode of your Wi-Fi access point. In general, the authentication mode is WPA PSK or WPA2 PSK. To change the mode, please refer to Table 1 for the list of supported authentication modes.
-# The password of your Wi-Fi access point.
-# The encryption mode of your Wi-Fi access point. In general, AES or TKIP is used. To change the mode, please refer to Table 2 for the list of supported encryption modes.
- Once the information is collected, use the following commands to configure the wrtnode^7. config write STA AuthMode 9 config write STA EncrypType 8 config write STA Ssid myhome config write STA SsidLen 6 config write STA WpaPsk 12345678 config write STA WpaPskLen 8 config write common OpMode 1
- Press the reset button on the wrtnode^7 to restart the system.
- Boot up with the new configuration. If everything is correct, similar messages will be shown in the console to notify your HDK has received an IP address. DHCP got IP:10.10.10.101
- PING from the wrtnode^7. If the IP address is fetched and the network is operating, the LinkIt 7687 can ping other devices on the network with the following command in the console. ping 10.10.10.254 3 64 The ping stops after sending three packets to 10.10.10.254. The ping usage is: ping <ip address> <times> <ping packet length>
- Wi-Fi configuration options for AuthMode and EncrypType.
+---+-------------------------------------+
| 0 | open, no security
|
+---+-------------------------------------+
| 4 | WPA PSK
|
+---+-------------------------------------+
| 7 | WPA2 PSK
|
+---+-------------------------------------+
| 9 | Support both WPA and WPA2 PSK
|
+---+-------------------------------------+
Table 1. Supported AuthMode(s)
+---+------------------------+
| 0 | WEP
|
+---+------------------------+
| 1 | No encryption
|
+---+------------------------+
| 4 | TKIP
|
+---+------------------------+
| 6 | AES
|
+---+------------------------+
| 8 | Support TKIP and AES
|
+---+------------------------+
Table 2. Supported EncrypType(s) 2 Example 2. Wi-Fi access point mode.
- Provide the Wi-Fi access point settings:
- SSID
- Authentication Mode
- Encryption Type
- Password
- Once the information is collected, use the following commands to configure the LinkIt 7687 HDK. This example assumes WPA2 PSK is used for authentication, AES for encryption, 'iot_ap' (length 6) for the SSID, and the password of the WPA2 is '87654321' (length 8). config write AP Ssid iot_ap config write AP SsidLen 6 config write AP AuthMode 7 config write AP EncrypType 6 config write AP WpaPsk 87654321 config write AP WpaPskLen 8 config write common OpMode 2
- Press the reset button on the wrtnode^7 to restart the system.
- Use a handheld device or a laptop computer to connect to the access point 'iot_ap'. In the console, the IP address assigned to the the handheld device or laptop is: [DHCPD:DBG]lease_ip:10.10.10.2 Warning This device complies with part 15 of the FCC Rules. Operation is subject to the condition that this device does not cause harmful interference (1) this device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation. Changes or modifications not expressly approved by the party responsible for compliance could void the user's authority to operate the equipment. NOTE: 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 reasonable protection against harmful interference in a residential installation. This equipment generates, uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures:
1Reorient or relocate the receiving antenna. 2 Increase the separation between the equipment and receiver. 3 Connect the equipment into an outlet on a circuit different from that to which the receiver is connected. 4Consult the dealer or an experienced radio/TV technician for help. To maintain compliance with FCCs RF Exposure guidelines, This equipment should be installed and operated with minimum distance between 20cm the radiator your body: Use only the supplied antenna. FCC ID:2ALR4-WRTNODE7 This device is intended only for OEM integrators under the following conditions:
1) Theantennamustbeinstalledsuchthat20cmismaintainedbetweentheantennaandusers, and 2) Thisdeviceanditsantenna(s)mustnotbecolocatedwithanyothertransmittersexceptin accordancewithFCCmultitransmitterproductprocedures.Referringtothemultitransmitter policy,multipletransmitter(s)andmodule(s)canbeoperatedsimultaneouslywithoutC2P. 3) ForallproductsmarketinUS,OEMhastolimittheoperationchannelsinCH1toCH11for2.4G bandbysuppliedfirmwareprogrammingtool.OEMshallnotsupplyanytoolorinfotothe enduserregardingtoRegulatoryDomainchange. USERSMANUALOFTHEENDPRODUCT:
Intheusersmanual oftheendproduct,theenduserhastobeinformedtokeepatleast20cm separationwiththeantennawhilethisendproductisinstalledandoperated.Theenduserhastobe informedthattheFCCradiofrequencyexposureguidelinesforanuncontrolledenvironmentcan be satisfied. The end user has to also be informed that any changes or modifications not expressly approved by the manufacturer could void the user's authority to operate thisequipment. Ifthesizeoftheendproductissmallerthan8x10cm,thenadditionalFCCpart15.19statementis requiredtobeavailable intheusersmanual:Thisdevice complieswithPart15ofFCC 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 interferencethatmaycauseundesiredoperation. LABELOFTHEENDPRODUCT:
The final end product must be labeled in a visible area with the following " Contains FCC ID:2ALR4-WRTNODE7".Ifthesizeoftheendproductislargerthan8x10cm,thenthefollowing FCCpart15.19statement hastoalsobeavailableonthelabel: ThisdevicecomplieswithPart 15 of FCC rules. Operation is subject to the following two conditions: (1) this device may notcause harmfulinterferenceand(2)thisdevicemustacceptanyinterferencereceived,including interferencethatmaycauseundesiredoperation.