WR3L Wi-Fi Module User Manual

 

1. Product Overview WR3LV1.0.0 User Manual WR3L is a low power-consuming built-in Wi-Fi module developed by Hangzhou Tuya Information Technology Co., Ltd. It consists of a highly integrated radio frequency chip

(RTL8710BX) and an external flash chip, with a built-in Wi-Fi network protocol stack and robust library functions. WR3L also contains a low power-consuming ARM CM4F, a WLAN MAC, a 1T1R WLAN, and the maximum basic frequency of 125 MHz, and is embedded with a 256 KB SRAM, a 2 MB flash, and robust peripheral resources. WR3L is an RTOS platform that integrates all the function libraries of the Wi-Fi MAC and TCP/IP protocols. You can develop built-in Wi-Fi products as required. 1.1 Features Built-in low power-consuming 32-bit CPU functioning as an application processor Basic frequency: 125 MHz Working voltage: 3 V to 3.6 V Peripherals: seven GPIOs, two UARTs, and one ADC Wi-Fi connectivity 802.11 B/G/N20/N40 Channels 1-11@2.4GHz Supports WPA/WPA2 safe modes SmartConfig mode (for Android and iOS devices) Passing the CE, FCC, and SRRC certification Working temperature: 20C to +105C 1.2 Major Application Fields Intelligent building Intelligent home and household appliances Healthcare Industrial wireless control Baby monitors Network camera Intelligent bus Version1.0.0 WR3LV1.0.0 User Manual 2. Module Interfaces 2.1 Dimensions and Pin Layout WR3L provides two rows of pins (2 x 8) with the distance of 2 mm between every two pins. WR3L dimensions: 16 mm (W) x 24 mm (L) x 3.3 mm (H) (see figure 2.1) 2.2 Pin definition Table 2.1 describes the common pins. Table 2.1WR3L pins description No. Symbol I/OType Function 1 2 3 4 5 6 7 NC

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Disconnected to be compatible with other modules GPIOA_22 CHIP_EN GPIOA_19 GPIOA_14 GPIOA_15 GPIOA_0 I/O I/O I/O I/O I/O I/O GPIOA_22 GPIOA_19 External enablement reset pin (valid at low level) GPIOA_14, used for hardware PWM GPIOA_15, used for hardware PWM GPIOA_0, which cannot be pulled up during power-on and can be configured after power-on. It is used for hardware PWM. Version1.0.0 WR3LV1.0.0 User Manual 8 9 10 11 VD33 GND ADC GPIOA_29 P P AI I/O Module power supply pin (3.3 V) Power supply reference ground pin ADC port, with the maximum input voltage of 5 V UART_Log_RXD (used for printing the internal information of the module) UART_Log_TXD (used for printing the internal GPIOA_30 GPIOA_5 GPIOA_12 12 13 14 15 16 Note: P indicates power-supply pins, I/O indicates input/output pins, and AI indicates GPIOA_5, used for hardware PWM GPIOA_12, used for hardware PWM UART0_RXD (users serial port) UART0_TXD (users serial port) information of the module) I/O I/O I/O I/O I/O RXD TXD analog input pins. 3. Electrical Parameters 3.1 Absolute electrical parameters Table 3.1,Absolute Parameters Parameters Ts VDD Static electricity voltage

(human model) Description Minimu m value Storage temperature Power-supply voltage TAMB 25C 40 0.3

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Maximu m value Unit 125 3.6 2 0.5 C V kV kV Static electricity voltage

(machine model) TAMB 25C 3.2 Electrical Conditions Table 3.2 Normal electrical conditions Paramet ers Description Min Typ Max Unit Ta Working temperature 20

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105 VDD Working voltage 3.0 3.3 3.6 C V VIL I/O low-level input 0.3

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VDD x 0.25 V Version1.0.0 VIH I/O high-level input VDD x 0.75 VOL I/O low-level output

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VOH I/O high-level output Imax I/O drive current Cpad Input pin capacitance VDD x 0.8

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3.3 Wi-Fi TX power consumption WR3LV1.0.0 User Manual

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2 3.6 VDD x 0.1 VDD 16

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V V V mA pF Table 3.3 TX power during constant emission Symbol Mode Power Typ Unit IRF IRF IRF IRF 11b 11 Mbit/s 20.63 dBm 11g 54 Mbit/s 11n BW20 MCS7 22.2 dBm 21.27 dBm 11n BW40 MCS7 20.82 dBm 287 255 244 230 mA mA mA mA 3.4 Wi-Fi RX power consumption Table 3.4 RX power during constant receiving Symbol Mode Typ Unit IRF IRF CPU sleep CPU active 90 120 mA mA Version1.0.0 WR3LV1.0.0 User Manual 3.5 Power consumption in operating mode Table 3.5, Module operating current Operation Mode EZ mode Operating condition, TA=25 Typ Peak Unit The module is in the EZ state and the Wi-Fi indicator fast flashes. 115 125 mA Idle mode The module is in the connected state and the Wi-Fi indicator is steady on. 60 209 mA Working mode The module is in the connected state and the Wi-Fi indicator is steady on. 118 198 mA Disconnection mode The module is in the disconnected state and the Wi-Fi indicator is steady off. 34 192 mA Notes: The peak period is approx. 5us. The preceding parameter values vary depending on the firmware functions. 4. RF Characteristics 4.1 Basic RF characteristics Table 4.1,Basic RF characteristics Parameter Description Frequency band 2.412 GHz to 2.462 GHz Wi-Fi standard Data transmission rate Antenna type IEEE 802.11b/g/n20/n40 (channels 1 to 11) 11b: 1, 2, 5.5, 11 (Mbit/s) 11g: 6, 9, 12, 18, 24, 36, 48, 54

(Mbit/s) 11n: HT20 MCS0 to MCS7 11n: HT40 MCS0 to MCS7 Onboard PCB antenna Version1.0.0 WR3LV1.0.0 User Manual 4.2 Wi-Fi RX sensitivity Parameter Table 4.2,RX Sensitivity Mbit/s 11 54 Mbit/s MCS7 PER < 8%, RX sensitivity, 802.11b CCK mode PER < 10%, RX sensitivity, 802.11g OFDM mode PER < 10%, RX sensitivity, 802.11n OFDM mode 5. Antenna Information 5.1 Antenna types Only the onboard PCB antenna is used. 5.2 Antenna interference reduction Min Typ Max Unit

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91 75 72

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dBm dBm dBm When using an onboard PCB antenna on a Wi-Fi module, make sure that the antenna on the module is at least 15 mm away from other metal parts to ensure optimal wireless performance. 6. Packaging information and production guidance 6.1 Mechanical dimensions Figure 6.1 Module dimensions Version1.0.0 WR3LV1.0.0 User Manual 6.2 Production Instructions Storage conditions of a delivered module are as follows:

1.The anti-moisture bag must be placed in an environment where the temperature is under 30C and the relative humidity is under 85%. 2. The shelf life of a dry-packaged product is six months from the date when the product is packaged and sealed. Note:

1.Throughout the production process, each involved operator must wear an electrostatic ring. 2. During the operation, strictly protect the module from water and strains. 6.3 Recommended Oven Temperature Profile Version1.0.0 WR3LV1.0.0 User Manual Regulatory Module Integration Instructions 2.2 List of applicable FCC rules This device complies with part 15.247 of the FCC Rules. According to the definition of mobile and fixed device is described in Part 2.1091(b), this device is a mobile device. 2.3 Summarize the specific operational use conditions This module can be used in household electrical appliances as well as lighting equipments. The input voltage to the module should be nominally 3.0 to 3.6V VDC ,typical value 3.3VDC and the ambient temperature of the module should not exceed 105. This module using only one kind of antennas with maximum gain is 2.5dBi .Other antenna arrangement is not covered by this certification. The antenna is not field replaceable. If the antenna needs to be changed, the certification should be re-applied. 2.4 Limited module procedures Not applicable 2.5 Trace antenna designs Not applicable 2.6 RF exposure considerations This equipment complies with FCC radiation exposure limits set forth for an uncontrolled environment .This equipment should be installed and operated with minimum distance 20cm between the radiator& your body. If the device built into a host as a portable usage, the additional RF exposure evaluation may be required as specified by 2.1093. This transmitter must not be co-located or operating in conjunction with any other antenna or transmitter. Country Code selection feature to be disabled for products marketed to the US. 2.7 Antennas Module only contains one PCB antenna. No additional external connectors. WR3LV1.0.0 User Manual 2.8 Label and compliance information The outside of final products that contains this module device must display a label referring to the enclosed module. This exterior label can use wording such as: Contains Transmitter Module FCC ID: 2ANDL-WR3L ,or Contains FCC ID: 2ANDL-WR3L , Any similar wording that expresses the same meaning may be used. 2.9 Information on test modes and additional testing requirements a) The modular transmitter has been fully tested by the module grantee on the required number of channels, modulation types, and modes, it should not be necessary for the host installer to re-test all the available transmitter modes or settings. It is recommended that the host product manufacturer, installing the modular transmitter, perform some investigative measurements to confirm that the resulting composite system does not exceed the spurious emissions limits or band edge limits (e.g., where a different antenna may be causing additional emissions). b) The testing should check for emissions that may occur due to the intermixing of emissions with the other transmitters, digital circuitry, or due to physical properties of the host product (enclosure). This investigation is especially important when integrating multiple modular transmitters where the certification is based on testing each of them in a stand-alone configuration. It is important to note that host product manufacturers should not assume that because the modular transmitter is certified that they do not have any responsibility for final product compliance. c) If the investigation indicates a compliance concern the host product manufacturer is obligated to mitigate the issue. Host products using a modular transmitter are subject to WR3LV1.0.0 User Manual all the applicable individual technical rules as well as to the general conditions of operation in Sections 15.5, 15.15, and 15.29 to not cause interference. The operator of the host product will be obligated to stop operating the device until the interference has been corrected Below are steps for on test modes tx_contin_en 1

// returnwifi tx continuous test!

wifitxout < parameter 1> < parameter 2> < parameter 3>

< parameter 1>Send channel option and allowed number is 1~11.

< parameter 2>Send data rate option, the relationship between input parameters and rates is shown in table 1.

< parameter 3>Send power attenuation Table 1: allowed input for speed of receiving or sending data package 11b mode 11g mode 11n mode Input Dial Speed Input Dial Speed Input Dial Speed 0x0 0x1 0x2 1M 2M 5.5M 0xb 0xf 0xa 6M 9M 0x10 6.5M / MCS0 0x11 13M / MCS1 12M 0x12 19.5M / MCS2 0x3 11M WR3LV1.0.0 User Manual 18M 0x13 26M / MCS3 24M 0x14 39M / MCS4 36M 0x15 52M / MCS5 48M 0x16 58.5M / MCS6 54M 0x17 65M / MCS7 0xe 0x9 0xd 0x8 0xc cmdstop

// Stop sending data package command 2.10 Additional testing, Part 15 subpart B disclaimer The final host / module combination need to be evaluated against the FCC Part 15B criteria for unintentional radiators in order to be properly authorized for operation as a Part 15 digital device. The host integrator installing this module into their product must ensure that the final composite product complies with the FCC requirements by a technical assessment or evaluation to the FCC rules, including the transmitter operation and should refer to guidance in KDB 996369. Frequency spectrum to be investigated For host products with certified modular transmitter, the frequency range of investigation of the composite system is specified by rule in Sections 15.33(a)(1) through (a)(3), or the range applicable to the digital device, as shown in Section 15.33(b)(1), whichever is the higher frequency range of investigation. WR3LV1.0.0 User Manual Operating the host product When testing the host product, all the transmitters must be operating.The transmitters can be enabled by using publicly-available drivers and turned on, so the transmitters are active. In certain conditions it might be appropriate to use a technology-specific call box

(test set) where accessory devices or drivers are not available. When testing for emissions from the unintentional radiator, the transmitter shall be placed in the receive mode or idle mode, if possible. If receive mode only is not possible then, the radio shall be passive (preferred) and/or active scanning. In these cases, this would need to enable activity on the communication BUS (i.e., PCIe, SDIO, USB) to ensure the unintentional radiator circuitry is enabled. Testing laboratories may need to add attenuation or filters depending on the signal strength of any active beacons (if applicable) from the enabled radio(s). See ANSI C63.4, ANSI C63.10 and ANSI C63.26 for further general testing details. The product under test is set into a link/association with a partnering WLAN device, as per the normal intended use of the product. To ease testing, the product under test is set to transmit at a high duty cycle, such as by sending a file or streaming some media content. FCC Statement Any Changes or modifications not expressly approved by the party responsible for compliance could void the users authority to operate the equipment. 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.