Last Updated on : 2020-07-31 03:33:11download
WBR3N is a low-power embedded WiFi+BT module that Tuya has developed. It consists of a highly integrated wireless RF chip (RTL8720CS), a few peripherals, an embedded WiFi network protocol stack, the BT network protocol, and varied library functions. WBR3N has an embedded low-power 32-bit CPU, 512 KB static random-access memory (SRAM), 4 MB ﬂash memory, and rich peripherals. WBR3N 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||7/13/2020||This is the first release.||V1.0.0|
WBR3N has two rows of pins with a 2± 0.1mm pin spacing. The WBR3N dimensions are 16 (W)×24 (L) ×3.0mm (H). The diagram of dimensions of WBR3N is as belows: Note: The general shape tolerance is +/-0.35 mm, the position tolerance related to the plug-in assembly is reduced to ±0.1 mm, and the tolerance of the 0.8-mm-thick plate is ±0.1 mm.
|Serial Number||Symbol||I/O Type||Function|
|2||ADC||AI||ADC^(1)^, which corresponds to PB 3 of IC|
|3||EN||I||Enabling pin, which needs to be connected to the voltage of 3.3V in normal cases and corresponds to CHIP_EN of IC|
|4||PA15||I/O||Common IO pin, which corresponds to PA 15 of IC|
|5||PA25||P||Support hardware PWM and correspond to PA 25 of IC|
|6||PA26||I/O||Support hardware PWM and correspond to PA 26 of IC|
|7||PA28||I/O||Support hardware PWM and correspond to PA 28 of IC|
|8||3V3||P||Power supply source (3.3V)|
|9||GND||P||Power supply reference ground|
|10||PA14||O||Common IO pin, which corresponds to PA 14 of IC|
|11||L_TX||O||UART0_TXD, which is used for displaying the internal information of a module and corresponds to UART_TXD of IC|
|12||PA27||I/O||Common IO pin, which corresponds to PA 27 of IC|
|13||PA13||I/O||Support hardware PWM and correspond to PA 13 of IC|
|14||PA12||I/O||Support hardware PWM and correspond to PA 12 of IC|
|15||RX/PB2||I/O||UART0_RXD(2), which corresponds to PB 2 of IC|
|16||TX/PB1||I/O||UART0_TXD(2), which corresponds to PB 1 of IC|
Note: P indicates power supply pins, I/O indicates input/output pins, and AI indicates analog input pins. RST is only a resetting pin of a module and cannot be used for clearing information about WiFi network configuration. (1): The pin can only be used as an ADC interface but cannot be used as a common IO interface. Once not used, it needs to be pulled up. As an ADC input port, the input voltage range is 0 to 1.0V. (2): UART0 is a user-side serial interface pin. When a module is enabled, there is information output from the user-side serial interface pin, which can be neglected.
|Parameter||Description||Minimum Value||Maximum Value||Unit|
|VBAT||Power supply voltage||3.0||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|
|VBAT||Power supply voltage||3.0||3.3||3.6||V|
|VIL||I/O low-level input||-0.3||-||VCC*0.25||V|
|VIH||I/O high-level input||VCC*0.75||-||VCC||V|
|VOL||I/O low-level output||-||-||VCC*0.1||V|
|VoH||I/O high-level output||VCC*0.8||-||VCC||V|
|Imax||I/O drive current||-||-||12||mA|
|Working Status||Mode||Rate||Transmit Power/Receiving||Maximum Value (Typical Value)||Unit|
|Transmission||11b||11 Mbps||+17.5 dBm||250||mA|
|Transmission||11g||54 Mbps||+14.5 dBm||200||mA|
|Receiving||11b||11 Mbps||constantly receive||70||mA|
|Receiving||11g||54 Mbps||constantly receive||72||mA|
|Receiving||11n-HT20||MCS 7||constantly receive||70||mA|
|Receiving||11n-HT40||MCS 7||constantly receive||73||mA|
|Working Mode||Working Status, Ta = 25°C||Average Value||Maximum Value (Typical Value)||Unit|
|Quick connection network status||The module is in the fast network connection state and the WiFi indicator always flashes||57||184||mA|
|Hotspot network configuration state||The module is in the hotspot network configuration state and the WiFi indicator always flashes slowly||203||392||mA|
|Network connection state||The module is connected to the network and the WiFi indicator is always on||55||98||mA|
|Disconnected status||The module is disconnected and the WiFi indicator is dark||53||59||mA|
|Working frequency||WiFi: 2.412 to 2.484 Ghz (channels 1 to 11 for US/CA and channels 1 to 13 for EU/CN); Bluetooth: 2402 to 2480 MHz|
|WiFi standard||IEEE 802.11 b/g/n|
|Data transmission rate||WiFi: 11b: 1, 2, 5.5, 11 (Mbps); 11g: 6, 9, 12, 18, 24, 36, 48, 54 (Mbps); 11n: HT2 0 MCS 0 to7; HT40 MCS 0 to 7; Bluetooth: 1M/2M|
|Antenna Type||PCB antenna with a gain of 2.5 dBi at 2.4 G|
TX Performance at 2.4 G
|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 HT20 mode, MCS7||-||14.5||-||dBm|
|Average RF output power, 802.11n HT40 mode, MCS7||-||13.5||-||dBm|
|Parameter||Minimum Value||Typical Value||Maximum Value||Unit|
|PER<8%, RX sensitivity, 802.11b CCK Mode 11M||-||-90||-||dBm|
|PER<10%, RX sensitivity, 802.11g, 54 M||-||-77||-||dBm|
|PER<10%, RX sensitivity, 802.11n HT20-MCS7||-||-75||-||dBm|
|PER<10%, RX sensitivity, 802.11n HT20-MCS7||-||-72||-||dBm|
WBR3N uses only an onboard PCB antenna.
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. To ensure the antenna performance, the PCB should not be routed or clad with copper in the antenna area. 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 the metal copper skin, so as to ensure the radiation effect of the antenna to the greatest extent.
For the antenna area of the PCB of the module, refer to Diagram of Mechanical Dimensions.
The RTL8720CS 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||40||mS|
|CHIP_EN||CHIP_EN ready time||0.6||40||mS|
A few pins (PA 12, PA 13, PA 15, PA 25, PA 28, and PA 26) of the module will have instantaneous high-level pulses before the chip fully works, and everything will be normal after the chip works. For these pins, if they are directly used as driving light sources or relays, in order to avoid the effect of burrs at the moment of power-on, refer to the following processing: Pull down a 1K resistor at an output port of a pin, and then connect a diode in series. At this time, the voltage of a GPIO will drop to about 2.7V after passing through the diode. The red box represents the original drive tube on the customer's baseboard. A diode D1 and pull-down 1K resistor need to be added. If a lamp is directly driven, pull down a 10K resistor on the grid of the positive Mos. If a lamp is not directly driven and a PWM signal will not be sent until the module is officially launched, there is no need to add a pull-down resistor and diode. If a relay is driven, you can change the diode to a resistor of 0 ohm according to the actual situation.
The WBR3N dimensions are 16mm (W)×24mm (L) ×3.0mm (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.
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
B. Baking equipment - a) Cabinet oven - b) Anti-static heat-resistant trays - c) Anti-static heat-resistant gloves
Storage conditions for a delivered module are as follows:
The package contains a humidity indicator card (HIC).
Bake a module based on HIC status as follows when you unpack the module package:
D. If the 30%, 40%, and 50% circles are blue, bake the module for 12 consecutive hours.
E. Rebaking condition: The module is not soldered within 12 hours after baking.
Do not use SMT to process modules that have been unpacked for more than 3 months. Electroless nickel immersion gold (ENIG) is used for the PCBs. If the solder pads are exposed to the air for more than 3 months, they will be oxidized severely and dry joints or solder skips may occur. Tuya is not liable for such problems and consequences.
Before SMT placement, take electrostatic discharge (ESD) protective measures.
To reduce the reﬂow defect rate, draw 10% of the products for visual inspection and AOI before the ﬁrst SMT placement to determine proper methods for controlling the oven temperature and attaching and placing components. Draw 5 to 10 modules from subsequent batches each hour for visual inspection and AOI.
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:
|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 complyAppth 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 minimum distance 20cm between the radiator and your body.
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-WBR3N. The final end product must be labeled in a viApple area with the following: “Contains Transmitter Module FCC ID: 2ANDL-WBR3N”
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. The device could be used with a separation distance of 20cm to the human body.