Last Updated on : 2022-08-09 02:26:42download
WBR2 is a low-power embedded WiFi+Bluetooth module that Tuya has developed. It consists of a highly integrated wireless RF chip (W701-VA2-CG), with an embedded WiFi network protocol stack and varied library functions.
With the maximum CPU clock rate of 100MHz, WBR2 also contains a low-power KM4 microcontroller unit (MCU), a WLAN MAC, a 1T1R WLAN module, 256 KB static random-access memory (SRAM), 2 MB ﬂash memory, and extensive peripherals.
WBR2 is an RTOS platform that integrates all function libraries of the WiFi MAC and TCP/IP protocols. You can develop embedded WiFi products as required.
WBR2 has two rows of pins with a 2mm pin spacing. The WBR2 dimensions are 15±0.35 mm (W)×18±0.35 mm (L) ×2.9±0.15 mm (H). The dimensions of WBR2 are as follows:
The definition of interface pins is shown in the following table:
|Pin number||Symbol||IO type||Function|
|1||3V3||/||Power supply pin (3.3V)|
|2||A19||I/O||GPIOA_19, hardware PWM, IC Pin40|
|3||GND||P||Power supply reference ground|
|4||A18||I/O||GPIOA_18, hardware PWM, IC Pin39|
|5||A13||I/O||GPIOA_13, UART0_RXD, which is used as a user-side serial interface pin|
|6||A17||I/O||GPIOA_17, hardware PWM, IC Pin38|
|7||A14||I/O||GPIOA_14, UART0_TXD, which is used as a user-side serial interface pin|
|8||A20||I/O||GPIOA_20, common GPIO, IC Pin1|
|9||A12||I/O||GPIOA_12, hardware PWM, IC Pin26|
|10||EN||I/O||Enabling pin, which works at the high level and is pulled up and controlled by a user externally|
|11||A11||I/O||GPIOA_11, hardware PWM, IC Pin25|
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|
|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||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 11Mbps||17 dBm||217||268||mA|
|IRF||11b 11Mbps||18 dBm||231||283||mA|
|IRF||11g 54Mbps||15 dBm||159||188||mA|
|IRF||11g 54Mbps||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|
|WiFi 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 MCS 0 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, 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 11Mbps Mode 17.5 dBm||-||-||-10||dB|
|EVM@802.11g OFDM 54Mbps 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|
WBR2 uses only an onboard PCB antenna with a gain of 2.5dBi.
To ensure optimal WiFi performance when the WiFi 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 WBR2 are 15±0.35 mm (W)×18±0.35 mm (L) ×0.8±0.1 mm (H). The following figure shows the mechanical dimensions of WBR2.
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 WBR2 which shows how pins correspond to each other.
WBR2 PCB Layout is shown as below:
For the Tuya in-line module, wave soldering is most preferred and manual soldering is less preferred. After being unpacked, the module 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 record the exposure time (the total exposure time cannot exceed 168 hours).
Wave soldering devices and materials:
The module needs to be baked in the following cases:
In the whole production process, take electrostatic discharge (ESD) protective measures.
To guarantee the quality of products, you must pay attention to the following items: The amount of soldering flux, the height of the wave peak, whether the tin slag and copper content in the wave soldering tank exceed standards, whether the window and thickness of the wave soldering fixture are appropriate, and whether the wave soldering oven temperature curve is appropriate.
Set oven temperatures according to the following temperature curve of wave soldering. The peak temperature is 260°C±5°C.
Recommended soldering temperature:
|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|
Storage conditions for a delivered module:
The moisture-proof bag is 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.
|Product Number||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: (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-WBR2. The end product must be labeled in a visible area with the following: “Contains Transmitter Module FCC ID: 2ANDL-WBR2”.
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 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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