WBR2 Module Datasheet
Last Updated on : 2020-08-10 01:49:08download
WBR2 is a low-power embedded WiFi+BLE module that Tuya has developed. It consists of a highly integrated wireless RF chip (RTL8720CF), 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.
|Serial Number||Update Date||Updated Content||Version after Update|
|1||10/28/2019||This is the first release.||V1.0.0|
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 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|
|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 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|
|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 connection state and the WiFi indicator always flashes||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 and the WiFi indicator is always on||66||305||mA|
|Disconnected status||The module is oﬄine and the WiFi indicator is dark||66||309||mA|
### Basic RF Features
|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 MCS0~7|
|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, BLE 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||-||-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|
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 RTL8720CF chip has requirements on the power-on sequence. It is recommended that the voltage rise from 0 to 3.3V within 40mS.
|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 in advance. The preferable type of IC is BL8506-27CRO. The module is packaged in the form of SOT23. Refer to the circuit in the following figure (R30 is preset and cannot be placed).
The mechanical dimensions of PCB of WBR2 are 15±0.35 mm (W)×18±0.35 mm (L) ×0.8±0.1 mm (H). The following figure shows 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 belows:
For oven temperature setting, refer to suggestions on oven temperatures for wave solering. The peak temperature is 260±5℃. The wave soldering temperature curve is as belows:
Suggestions on oven temperatures for wave solering
Storage conditions for a delivered module are as follows: A. The moisture-proof bag is placed in an environment where the temperature is below 30°C and the relative humidity is lower than 70%. B. The shelf life of a dry-packaged product is 6 months from the date when the product is packaged and sealed. C. The package contains a humidity indicator card (HIC).
|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 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-WBR2. The final 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: 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.