Last Updated on : 2022-08-03 02:29:53download
WR3E is a low-power embedded Wi-Fi module that Tuya has developed. It consists of a highly integrated RF chip (RTL8710BN) and an external flash chip, with an embedded Wi-Fi network protocol stack and rich library functions.
With the maximum CPU clock rate of 125 MHz, WR3E also contains a low-power ARM CM4F, a WLAN MAC, a 1T1R WLAN module, 256-KB static random-access memory (SRAM), 2-MB ﬂash memory, and rich peripherals.
WR3E is an RTOS platform that integrates all function libraries of the Wi-Fi MAC and TCP/IP. You can develop embedded Wi-Fi products as required.
WR3E has two lines of pins with a 2-mm pin spacing. Each row has 8 pins.
The WR3E dimensions are 16±0.35 mm (W)×24±0.35 mm (L)× 3.4±0.15 mm (H). The thickness of the PCB is 0.8 ± 0.1 mm. The shield case is 2.5±0.05 mm.
Descriptions on the arrangement of pins of WR3E:
|Pin number||Symbol||I/O type||Function|
|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 print 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, Pin 13 of the IC|
|6||GPIOA_15||I/O||GPIOA_15, hardware PWM, Pin 14 of the IC|
|7||GPIOA_22||I/O||GPIOA_22, hardware PWM, Pin 31 of the IC|
|8||VCC||P||Power supply pin (3.3V)|
|9||GND||P||Power supply reference ground|
|10||GPIOA_0||I/O||GPIOA_0, which cannot be pulled high when powered on, and which is configurable after the level is pulled to be high, hardware PWM, Pin 16 of the IC|
|11||GPIOA_30||I/O||UART_Log_TXD (used to print the internal information of the module), which can be configured as a universal GPIO|
|12||GPIOA_19||I/O||GPIOA_19, a universal I/O port, Pin 30 of the IC|
|13||GPIOA_5||I/O||GPIOA_5, hardware PWM, Pin 28 of the IC|
|14||GPIOA_12||I/O||GPIOA_12, hardware PWM, Pin 17 of the IC|
|15||RXD||I/O||UART0_RXD (user-side serial interface)|
|16||TXD||I/O||UART0_TXD (user-side serial interface)|
Note: P indicates a power supply pin, I/O indicates an input/output pin and AI indicates an analog input pin.
|Parameter||Description||Minimum value||Maximum Value||Unit|
|ESD voltage (human body model)||TAMB-25℃||-||2||kV|
|ESD voltage (machine model)||TAMB-25℃||-||0.5||kV|
|Parameter||Description||Minimum value||Typical value||Maximum value||Unit|
|VIL||I/O low level input||-0.3||-||VDD*0.25||V|
|VIH||I/O high level input||VDD*0.75||-||3.6||V|
|VOL||I/O low level output||-||-||VDD*0.1||V|
|VOH||I/O high level output||VDD*0.8||-||VDD||V|
|Imax||I/O drive current||-||-||16||mA|
|Cpad||Input pin capacitance||-||2||-||pF|
|Working status||Mode||Rate||Transmit power/Receive||Average value||Peak value (Typical value)||Unit|
RX power consumption:
|Working mode||Working status, TA = 25°C||Average value||Peak value (Typical value)||Unit|
|Quick network connection state||The module is in the fast network connection state and the Wi-Fi indicator flashes fast||115||376||mA|
|Hotspot network configuration state||The module is in the hotspot network configuration state and the Wi-Fi indicator flashes slowly||60||386||mA|
|Network connection idle state||The module is connected to the network and the Wi-Fi indicator is always on||105||389||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|
Note: The peak value lasts about 5us. The above parameters may vary with firmware functions.
|Working frequency||2.412 to 2.484 GHz|
|Wi-Fi standard||IEEE 802.11n/g/n (channels 1 to 14)|
|Data transmission rate||11b: 1, 2, 5.5, 11 (Mbps)
11g: 6, 9, 12, 18, 24, 36, 48, 54 (Mbps)
11n: HT20 MCS0 to 7
11n: HT40 MCS0 to 7
|Antenna type||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 11M||-||17.5||-||dBm|
|Average RF output power, 802.11g OFDM Mode 54M||-||14.5||-||dBm|
|Average RF output power, 802.11n OFDM Mode MCS7||-||13.5||-||dBm|
|EVM@802.11b CCK 11Mbps Mode 17.5dBm||-||-16||-|
|EVM@802.11g OFDM 54Mbps Mode 15.0dBm||-||-30||-|
|EVM@802.11n OFDM MCS7 Mode 14.0dBm||-||-31||-|
|Parameter||Minimum value||Typical value||Maximum value||Unit|
|PER<8%, RX sensitivity, 802.11b CCK Mode 11M||-||-91||-||dBm|
|PER<10%, RX sensitivity, 802.11g OFDM Mode 54M||-||-75||-||dBm|
|PER<10%, RX sensitivity, 802.11n OFDM Mode MCS7||-||-72||-||dBm|
By default, WR3E uses only the PCB antenna.
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.
To prevent adverse impact on the antenna radiation performance, avoid copper or traces along the antenna area on the PCB. The main points of the layout: 1. Make sure that there is no substrate medium directly below or above the printed antenna. 2. Make sure that the area around the printed antenna is far away from copper, so as to ensure the radiation effect of the antenna to the greatest extent.
The stamp-hole module must be mounted by the SMT machine. After being unpacked, it must be soldered within 24 hours. Otherwise, it must be put into the drying cupboard where the RH is not greater than 10%, or it needs to be packaged under vacuum again and the exposure time needs to be recorded (the total exposure time cannot exceed 168 hours).
Storage conditions for a delivered module are as follows:
The module needs to be baked in the following cases:
In the whole production process, take electrostatic discharge (ESD) protective measures.
To guarantee the passing rate, it is recommended that you use the SPI and AOI to monitor the quality of solder paste printing and mounting.
Perform mounting with the SMT based on the following reﬂow oven temperature curve. The highest temperature is 245°C. The reflow temperature curve is as below:
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.
|Product model||MOQ (pcs)||Shipping packaging method||The number of modules per reel||The number of reels per carton|
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:
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-WR3E. The end product must be labelled in a visible area with the following: “Contains Transmitter Module FCC ID: 2ANDL-WR3E”.
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 2) 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 is in compliance 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, in accordance with 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 to a municipal recycling collection point.
The device could be used with a separation distance of 20cm to the human body.
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