Last Updated on : 2022-09-09 07:20:13download
WBR3 is a low-power embedded Wi-Fi+Bluetooth module that Tuya has developed. It consists of a highly integrated RF chip (W701-VA2-CG), with an embedded Wi-Fi network protocol stack and varied library functions.
With the maximum CPU clock rate of 100MHz, WBR3 also contains a low-power KM4 microcontroller unit (MCU), WLAN MAC, a 1T1R WLAN module, 256-KB static random-access memory (SRAM), 2-MB ﬂash memory, and extensive peripherals.
WBR3 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.
As shown in the following figure, WBR3 has two rows of pins and each row includes 8 pins with a 2 mm pin spacing. The WBR3 dimensions (H x W x L) are 2.9 mm x 16 mm x 24 mm. The default dimensional tolerance is ±0.35 mm.
|Pin number||Symbol||I/O type||Function|
|1||NC||/||The pin is pulled up to be compatible with other modules|
|2||A_7||I/O||GPIOA_7, hardware PWM, IC Pin 21|
|3||EN||I/O||Enabling pin, which works at the high level and is pulled up and controlled by a user externally|
|4||A_11||I/O||GPIOA_11, hardware PWM, IC Pin 25|
|5||A_2||I/O||GPIOA_2, hardware PWM, IC Pin 18|
|6||A_3||I/O||GPIOA_3, hardware PWM, IC Pin 19|
|7||A_4||I/O||GPIOA_4, hardware PWM, IC Pin 20|
|8||VCC||P||Power supply pin (3.3V)|
|9||GND||P||Power supply reference ground|
|10||A_12||I/O||GPIOA_12, hardware PWM, IC Pin 26|
|11||A_16||I/O||GPIOA_16, UART_Log_TXD, which is used for displaying the module internal information and can be configured as a common GPIO|
|12||A_17||I/O||GPIOA_17, hardware PWM, IC Pin 38|
|13||A_18||I/O||GPIOA_18, hardware PWM, IC Pin 39|
|14||A_19||I/O||GPIOA_19, hardware PWM, IC Pin 40|
|15||RXD||I/O||GPIOA_13, UART0_RXD, which is used as a user-side serial interface pin|
|16||TXD||I/O||GPIOA_14, UART0_TXD, which is used as a user-side serial interface pin|
Note:: P indicates power supply pins and I/O indicates input/output pins.
|Parameter||Description||Minimum value||Maximum value||Unit|
|VDD||Power supply voltage||-0.3||3.6||V|
|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|
|VDD||Power supply voltage||3.0||-||3.6||V|
|VIL||I/O low-level input||-||-||0.8||V|
|VIH||I/O high- level input||2.0||-||-||V|
|VOL||I/O low-level output||-||-||0.4||V|
|VOH||I/O high-level output||2.4||-||-||V|
|Imax||I/O drive current||-||-||16||mA|
|Cpad||Input pin capacitance||-||2||-||pF|
TX power consumption:
|Symbol||Mode||Power||Average value||Peak value (Typical value)||Unit|
|IRF||11b 11 Mbps||17 dBm||217||268||mA|
|IRF||11b 11 Mbps||18 dBm||231||283||mA|
|IRF||11g 54 Mbps||15 dBm||159||188||mA|
|IRF||11g 54 Mbps||17.5 dBm||177||213||mA|
|IRF||11n BW20 MCS7||13 dBm||145||167||mA|
|IRF||11n BW20 MCS7||16.5 dBm||165||193||mA|
RX power consumption:
|Symbol||Mode||Average value||Peak value (Typical value)||Unit|
|IRF||11N HT20 MCS7||65||67||mA|
|Working mode||Working status, Ta = 25°C||Average value||Maximum value (Typical value)||Unit|
|Quick network connection state (Bluetooth)||The module is in the fast network connection state and the Wi-Fi indicator flashes fast||61||272||mA|
|Quick network connection state (AP)||The module is in the hotspot network connection state and the Wi-Fi indicator flashes slowly||59||272||mA|
|Quick network connection state (EZ)||The module is in the fast network connection state and the Wi-Fi indicator flashes fast||62||280||mA|
|No operation during network connection||The module is connected to the network and the Wi-Fi indicator is always on||51||260||mA|
|Operations are being performed during network connection||The module is connected to the network and the Wi-Fi indicator is always on||59||268||mA|
|Weakly connected||The module and the hotspot are weakly connected and the Wi-Fi indicator light is always on||62||264||mA|
|Disconnected||The module is in disconnected state and the Wi-Fi indicator light is always off||57||268||mA|
|Module disabled||The EN pin of the module is connected to the ground.||1.5||1.6||uA|
|Frequency range||2.400 to 2.4835 GHz|
|Wi-Fi standard||IEEE 802.11b/g/n (channels 1 to 14)|
|Bluetooth standard||Bluetooth 4.2|
|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 MC S 0 to 7|
|Antenna type||PCB antenna with a peak gain of 2.54 dBi|
|Parameter||Minimum value||Tyical value||Maximum value||Unit|
|Average RF output power, 802.11b CCK Mode, 1 Mbit/s||-||17.5||-||dBm|
|Average RF output power, 802.11g OFDM mode, 54 Mbit/s||-||14.5||-||dBm|
|Average RF output power, 802.11n OFDM mode MCS7||-||13.5||-||dBm|
|Average RF output power, Bluetooth 4.2, 1 Mbit/s||-||6.5||-||dBm|
|EVM@802.11b CCK 11 Mbps Mode 17.5 dBm||-||-||-10||dB|
|EVM@802.11g OFDM 54 Mbps Mode 14.5 dBm||-||-||-29||dB|
|EVM@802.11n OFDM MCS7 Mode 13.5 dBm||-||-||-30||dB|
|Parameter||Minimum value||Typical value||Maximum value||Unit|
|PER<8%, RX sensitivity, 802.11b CCK Mode 1M||-||-97||-||dBm|
|PER<10%, RX sensitivity, 802.11g OFDM Mode 54M||-||-75||-||dBm|
|PER<10%, RX sensitivity, 802.11n OFDM Mode MCS7||-||-72||-||dBm|
|PER<10%, RX sensitivity, Bluetooth 4.2 1M||-||-93||-||dBm|
WBR3 uses an onboard PCB antenna with a peak gain of 2.54 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.
As shown in the following figure, the mechanical dimensions of the PCB of WBR3 are 16±0.35 mm (W)×24±0.35 mm (L) ×0.8±0.1 mm (H).
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 WBR3 which shows how pins correspond to each other.
WBR3 PCB Layout is shown as below:
The Tuya SMT module should be mounted by the SMT device. After being unpacked, it should be soldered within 24 hours. Otherwise, it should 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:
The moisture-proof bag must be placed in an environment where 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.
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.
Set oven temperatures according to the following temperature curve of reflow soldering. The peak temperature is 245°C.
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 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.
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:
Radiation Exposure Statement
This equipment complies with FCC radiation exposure limits set forth for an uncontrolled rolled environment. This equipment 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 in accordance with FCC multi-transmitter product procedures. Additional testing and equipment 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 to 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/warning 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-WBR3. The final end product must be labeled in a visible area with the following: “Contains Transmitter Module FCC ID: 2ANDL-WBR3”.
This device is intended only for OEM integrators under the following conditions:
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 a municipal recycling collection point.
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