WBR3 Module Datasheet
Last Updated on : 2020-08-10 01:49:37download
WBR3 is a low-power embedded WiFi+BT module that Tuya has developed. It consists of a highly integrated RF chip (RTL8720CF), with an embedded WiFi 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 WiFi MAC and TCP/IP protocols. You can develop embedded WiFi products as required.
|Serial Number||Date||Change Description||Version after Change|
|1||10/21/2019||This is the ﬁrst release.||V1.0.0|
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|
|Static electricity voltage (human body model)||TAMB-25℃||-||2||KV|
|Static electricity 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|
|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|
|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||Peak Value (Typical Value)||Unit|
|Quick connection network status||The module is in the fast network conﬁguration state, WiFi||75||324||mA|
|Network connection idle state||The module is connected to the network and the WiFi indicator is always on||64||314||mA|
|Network connection operation status||The module is connected to the network, WiFi||66||305||mA|
|Disconnected status||The module is oﬄine and the WiFi indicator is dark||66||309||mA|
|Frequency range||2.400 to 2.4835 GHz|
|WiFi standard||IEEE 802.11b/g/n (channels 1 to 14)|
|BLE 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 gain of 2.5 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, BLE 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||-||-91||-||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, BLE 4.2 1M||-||-93||-||dBm|
WBR3 uses an onboard PCB antenna with a gain of 2.5 dBi.
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 RTL8720CF chip has requirements on the power-on sequence. It is recommended that the voltage rise from 0 to 3.3V within 40mS.
|Symbol||Parameter||Minimum Value||Typical Value||Maximum Value||Unit|
|TPRDY||3.3V ready time||0.6||20||mS|
|CHIP_EN||CHIP_EN ready time||0.6||20||mS|
When designing a plate of a module, you should set a resetting IC at the foot of CHIP_EN. The preferable type of IC is BL8506-27CRO. The module is packaged by SOT23. The following shows a circuit (R30 is preset and cannot be placed).
As shown in the following figure, the mechanical dimensions of 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 belows:
Use an SMT placement machine to mount the stamp hole module that Tuya produces onto the PCB within 24 hours after the module is unpacked and the ﬁrmware is burned. If not, vacuum pack the module again. Bake the module before mounting it onto the PCB.
A. SMT placement equipment - Reﬂow soldering machine - Automated optical inspection (AOI) equipment - Nozzle with a 6 mm to 8 mm diameter
B. Baking equipment - Cabinet oven - Anti-static heat-resistant trays - Anti-static heat-resistant gloves
Perform SMT placement based on the following reﬂow oven temperature curve. The highest temperature is 245°C. The reflow temperature curve is shown as belows: Refer to IPC/JEDEC standard；Peak Temperature:<245℃；Number of Times：≤2 times
|Product Number||MOQ (pcs)||Shipping packaging method||Modules per reel (pcs)|
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: - Reorient or relocate the receiving antenna. - Increase the separation between the equipment and receiver. - Connect the equipment into an outlet on a circuit different from that to which the receiver is connected. - Consult the dealer or an experienced radio/TV technician for help.
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 minimum distance 20cm between the radiator and your body.
Important Note This radio module must not installed to co-locate and operating simultaneously with other radios in host system except in accordance with FCC multi-transmitter product procedures. Additional testing and equipment authorization may be required to operating simultaneously with other radio. 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 have got a 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: 1)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 2 conditions above are met, further transmitter test 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 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.