Last Updated on : 2022-08-09 03:01:22download
WR3LE is a low-power embedded Wi-Fi module that Tuya has developed. It consists of a highly integrated wireless RF chip (RTL8710BX) and an external flash chip, with an embedded Wi-Fi network protocol stack and varied library functions.
With the maximum CPU clock rate of 62.5MHz, WR3LE also contains a low-power ARM CM4F, a WLAN MAC, a 1T1R WLAN module, a 256-KB SRAM, 2-MB ﬂash memory, and extensive peripherals.
WR3LE is an RTOS platform that integrates all function libraries of the Wi-Fi MAC and TCP/IP protocols. You can develop embedded Wi-Fi products as required.
WR3LE has two rows of pins with a 2mm pin spacing. Each row has 8 pins.
The WR3LE dimensions are 16±0.35 mm (W)×24±0.35 mm (L) ×3.4±0.15 mm (H). The dimensions of WR3LE are as follows:
Definitions on interface pins are shown as below:
|1||NC||/||Pulled up and not connected, to be compatible with other modules|
|2||ADC||AI||ADC port, the maximum input voltage is 5V|
|3||CHIP_EN||I/O||When software disables the function, connection by a user fails|
|4||GPIOA_29||I/O||UART_Log_RXD (used to display the internal information of the module), which can be configured as a universal GPIO. The module has been pulled up and cannot be used for triggering the high level|
|5||GPIOA_14||I/O||GPIOA_14, hardware PWM, IC Pin 13|
|6||GPIOA_15||I/O||GPIOA_15, hardware PWM, IC Pin 14|
|7||GPIOA_22||I/O||GPIOA_22, hardware PWM, IC Pin 31|
|8||VCC||P||Power supply pin (3.3 V)|
|9||GND||P||Power supply reference ground|
|10||GPIOA_0||I/O||GPIOA_0, which cannot be pulled high when powered on, and which can be configured with any level after being enabled, hardware PWM, IC Pin 16|
|11||GPIOA_30||I/O||UART_Log_TXD (used to display the internal information of the module), which can be configured as a universal GPIO|
|12||GPIOA_19||I/O||GPIOA_19, a universal IO port, IC Pin 30|
|13||GPIOA_5||I/O||GPIOA_5, hardware PWM, IC Pin 28|
|14||GPIOA_12||I/O||GPIOA_12, hardware PWM, IC Pin 17|
|15||RXD||I/O||UART0_RXD (user-side serial interface)|
|16||TXD||I/O||UART0_TXD (user-side serial interface)|
Note: P indicates power supply pins, I/O indicates input/output pins, and AI indicates analog input pins.
|Parameter||Description||Minimum Value||Maximum Value||Unit|
|VDD||Power supply voltage||-0.3||3.6||V|
|Static electricity discharge voltage (human body model)||TAMB-25℃||-||2||KV|
|Static electricity discharge voltage (machine model)||TAMB-25℃||-||0.5||KV|
|Parameter||Description||Minimum Value||Typical Value||Maximum Value||Unit|
|VIL||IO low-level input||-0.3||-||VDD*0.25||V|
|VIH||IO high-level input||VDD*0.75||-||3.6||V|
|VOL||IO low-level output||-||-||VDD*0.1||V|
|VOH||IO high-level output||VDD*0.8||-||VDD||V|
|Imax||IO drive current||-||-||16||mA|
|Cpad||Input pin capacitance||-||2||-||pF|
TX power consumption:
|Working status||Mode||Rate||Transmit power/Receive||Average value||Peak value (Typical value)||Unit|
|Transmit||11 b||11 Mbps||+17 dBm||287||367||mA|
|Transmit||11 b||11 Mbps||+18 dBm||295||382||mA|
|Transmit||11 g||54 Mbps||+15 dBm||255||406||mA|
|Transmit||11 g||54 Mbps||+17.5 dBm||267||428||mA|
|Transmit||11n-HT20||MCS 7||13 dBm||244||395||mA|
|Transmit||11n-HT20||MCS 7||16.5 dBm||257||422||mA|
|Transmit||11n-HT40||MCS 7||13 dBm||220||393||mA|
|Transmit||11n-HT40||MCS 7||16.5 dBm||230||420||mA|
RX power consumption:
WR3LE operating current
|Working Mode||Working Status, Ta = 25°C||Average Value||Peak Value (Typical Value)||Unit|
|Quick connection network state||The module is in the fast network connection state and the Wi-Fi indicator always flashes||115||376||mA|
|Hotspot network configuration state||The module is in the hotspot network configuration state and the Wi-Fi indicator always flashes slowly||60||386||mA|
|Network connection operation state||The module is connected to the network and the Wi-Fi indicator is always on||105||389||mA|
|Disconnected state||The module is disconnected and the Wi-Fi indicator is dark||45||381||mA|
|Frequency range||2.400 to 2.4835 GHz|
|Wi-Fi standard||IEEE 802.11b/g/n (channels 1 to 14)|
|Data transmission rate||11b: 1, 2, 5.5, 11 (Mbps)|
|Data transmission rate||11g: 6, 9, 12, 18, 24, 36, 48, 54 (Mbps)|
|Data transmission rate||11n: HT20 MCS 0 to 7|
|Data transmission rate||11n: HT40 MCS 0 to 7|
|Antenna type||Onboard PCB antenna with a gain of 2.5 dBi|
|Parameter||Minimum Value||Typical Value||Maximum Value||Unit|
|Average RF output power, 802.11b CCK Mode 1 M||-||17.5||-||dBm|
|Average RF output power, 802.11g OFDM Mode 54 M||-||14.5||-||dBm|
|Average RF output power, 802.11n OFDM Mode MCS 7||-||13.5||-||dBm|
|Peak RF output power, 802.11b CCK Mode 1 M||-||19||-||dBm|
|Peak RF output power, 802.11g OFDM Mode 6 M||-||20||-||dBm|
|Peak RF output power, 802.11n OFDM Mode MCS 0||-||20||-||dBm|
|EVM@802.11b CCK 11 Mbps Mode 17.5 dBm||-||-10||dB|
|EVM@802.11g OFDM 54 Mbps Mode 15.0 dBm||-||-29||dB|
|EVM@802.11n OFDM MCS7 Mode 14.0 dBm||-||-30||dB|
|Parameter||Minimum Value||Typical Value||Maximum Value||Unit|
|PER<8%, RX sensitivity, 802.11b CCK Mode 1 M||-||-91||-||dBm|
|PER<10%, RX sensitivity, 802.11g OFDM Mode 54M||-||-75||-||dBm|
|PER<10%, RX sensitivity, 802.11n OFDM Mode MCS7||-||-72||-||dBm|
WR3LE uses only an onboard PCB antenna with a gain of 2.5 dBi.
To ensure optimal Wi-Fi performance when the Wi-Fi module uses an onboard PCB antenna, it is recommended that the antenna be at least 15 mm away from other metal parts.
The mechanical dimensions of the PCB of WR3LE are 16±0.35 mm (W)×24±0.35 mm (L) ×0.8±0.1 mm (H).
The following figure shows the mechanical dimensions of WR3LE.
Note: The default dimensional tolerance is ±0.35 mm. If you have specific requirements on dimensions, make them clear in the datasheet after communication.
The following figure is a schematic diagram of WR3LE which shows the layout of pins.
WR3LE PCB footprint is shown below:
WR3LE has two models: WBR3L with pin headers and WBR3L without pin headers. Which one is used depends on actual situations. Dimensions and recommended layout of pin headers (unit: mm):
The moisture-proof bag must be placed in an environment in which the temperature is below 40°C and the relative humidity is lower than 90%.
The shelf life of a dry-packaged product is 12 months from the date when the product is packaged and sealed.
There is a humidity indicator card (HIC) in the packaging bag.
Select a proper soldering manner according to the process. For the SMT process, please refer to the recommended oven temperature curve of reflow soldering. For the wave soldering process, please refer to the recommended oven temperature curve of wave soldering. There are some differences between the set temperatures and the actual temperatures. All the temperatures shown in this module datasheet are obtained through actual measurements.
Manner 1: SMT process (Recommended oven temperature curve of reflow soldering)
Set oven temperatures according to the following curve.
A: Temperature axis
B: Time axis
C: Liquidus temperature: 217 to 220°C
D: Ramp-up slope: 1 to 3°C/s
E: Duration of constant temperature: 60 to 120s; the range of constant temperature: 150 to 200°C
F: Duration above the liquidus: 50 to 70s
G: Peak temperature: 235 to 245°C
H: Ramp-down slope: 1 to 4°C/s
Note: The above curve is just an example of the solder paste SAC305. For more details about other solder pastes, please refer to Recommended oven temperature curve in the solder paste specifications.
Manner 2: Wave soldering process (Oven temperature curve of wave soldering)
Set oven temperatures according to the following temperature curve of wave soldering. The peak temperature is 260°C±5°C.
|Suggestions on oven temperature curve of wave soldering||Suggestions on manual soldering temperature|
|Preheat temperature||80 to 130 °C||Soldering temperature||360±20°C|
|Preheat time||75 to 100s||Soldering time||＜3s/point|
|Peak contact time||3 to 5s||NA||NA|
|Temperature of tin cylinder||260±5°C||NA||NA|
|Product Number||MOQ (pcs)||Shipping packaging method||The number of modules per reel (pcs)||The number of reels per carton (reel)|
FCC Caution: Any changes or modifications not expressly approved by the party responsible for compliance could void the user’s authority to operate this device.
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.
Note: This device has been tested and found to comply with the limits for a Class B digital device, according to part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This device generates, uses, and can radiate radio frequency energy and, if not installed and used following 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 device does cause harmful interference to radio or television reception, which can be determined by turning the device off and on, the user is encouraged to try to correct the interference by one or more of the following measures:
Radiation Exposure Statement
This device complies with FCC radiation exposure limits set forth for an uncontrolled rolled environment. This device should be installed and operated with a minimum distance of 20cm between the radiator and your body.
This radio module must not be installed to co-locate and operating simultaneously with other radios in the host system except following FCC multi-transmitter product procedures. Additional testing and device authorization may be required to operate simultaneously with other radios.
The availability of some specific channels and/or operational frequency bands are country dependent and are firmware programmed at the factory to match the intended destination. The firmware setting is not accessible by the end-user.
The host product manufacturer is responsible for compliance with any other FCC rules that apply to the host not covered by the modular transmitter grant of certification. The final host product still requires Part 15 Subpart B compliance testing with the modular transmitter installed.
The end-user manual shall include all required regulatory information/warnings as shown in this manual, including “This product must be installed and operated with a minimum distance of 20 cm between the radiator and user body”.
This device has got an FCC ID: 2ANDL-WR3LE. The end product must be labelled in a visible area with the following: “Contains Transmitter Module FCC ID: 2ANDL-WR3LE”.
This device is intended only for OEM integrators under the following conditions:
The antenna must be installed such that 20cm is maintained between the antenna and users, and the transmitter module may not be co-located with any other transmitter or antenna.
As long as the 2 conditions above are met, further transmitter tests will not be required. However, the OEM integrator is still responsible for testing their end-product for any additional compliance requirements required with this module installed.
Declaration of Conformity European Notice
Hereby, Hangzhou Tuya Information Technology Co., Ltd declares that this module product complies with essential requirements and other relevant provisions of Directive 2014/53/EU,2011/65/EU. A copy of the Declaration of conformity can be found at https://www.tuya.com.
This product must not be disposed of as normal household waste, following the EU directive for waste electrical and electronic equipment (WEEE-2012/19/EU). Instead, it should be disposed of by returning it to the point of sale, or a municipal recycling collection point.
The device could be used with a separation distance of 20cm to the human body.
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