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Tuya WBR2 Wi-Fi and Bluetooth Module

Version: 2.0.0

Date: 2019-10-28

No.: 0000000001

Global Intelligent Platform

1. Product Overview

WBR2 is a low-power embedded Wi-Fi and Bluetooth module that Tuya has developed. It

consists of a highly integrated RF chip (RTL8720CF) with an embedded Wi-Fi network

protocol stack and robust library functions. WBR2 also contains a low-power KM4

microcontroller unit (MCU), a WLAN MAC, a 1T1R capable WLAN baseband, 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 Wi-Fi MAC and

TCP/IP protocols. You can develop embedded Wi-Fi and Bluetooth products as required.

Figure 1-1 shows the WBR2 architecture.

Figure 1-1 WBR2 architecture

Product

Manual

Summary of content (20 pages)

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Global Intelligent Platform Product Manual Tuya WBR2 Wi-Fi and Bluetooth Module Date: 2019-10-28 Version: 2.0.0 No.: 0000000001 1. Product Overview WBR2 is a low-power embedded Wi-Fi and Bluetooth module that Tuya has developed. It consists of a highly integrated RF chip (RTL8720CF) with an embedded Wi-Fi network protocol stack and robust library functions.
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WBR2 Datasheet 1.1 Features  Embedded low-power KM4 MCU, which can also function as an application processor  Clock rate: 100 MHz  Working voltage: 3.0 V to 3.6 V  Peripherals: six GPIOs and one universal asynchronous receiver/transmitter (UART)  Wi-Fi connectivity  802.11b/g/n20  Channels 1 to 14 at 2.4 GHz  Compatible with Bluetooth low energy (BLE) 4.2(Up to +9dBm EIPR output power)  WPA and WPA2 security modes  Up to +20 dBm EIRP output power in 802.
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WBR2 Datasheet Change History No. 1 Date 2019-10-28 Change Description This is the first release. 3 Version After Change 2.0.
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WBR2 Datasheet Contents 1. Product Overview........................................................................................................................ 1 1.1 Features.............................................................................................................................. 2 1.2 Application Scenarios....................................................................................................... 2 2. Module Interfaces.....................................................
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WBR2 Datasheet Tables Table 2-1 WBR2 interface pins.............................................................................................. 6 Table 3-1 Absolute electrical parameters.............................................................................7 Table 3-2 Normal working conditions....................................................................................8 Table 3-3 Current consumption during constant transmission.........................................
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WBR2 Datasheet 2. Module Interfaces 2.1 Dimensions and Footprint WBR2 has two rows of pins with a 2 mm pin spacing. The WBR2 dimensions (H x W x D) are 2.9±0.15 mm x 15±0.35 mm x 18±0.35 mm. Figure 2-1 shows the WBR2 front and rear views. Figure 2-1 WBR2 front and rear views 2.2 Interface Pin Definition Table 2-1 WBR2 interface pins Pin No. Symbol I/O Type Function 1 3V3 N/A Power supply pin (3.
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WBR2 Datasheet Pin No.
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WBR2 Datasheet Parameter Description Minimum Value Maximum Value Unit Static electricity voltage (human body model) Tamb = 25°C N/A 2 kV Static electricity voltage (machine model) Tamb = 25°C N/A 0.5 kV 3.2 Working Conditions Table 3-2 Normal working conditions Minimum Value Typical Value Maximum Value Unit Working temperature –20 N/A 85 °C Working voltage 3.0 N/A 3.6 V VIL I/O low-level input N/A N/A 0.8 V VIH I/O high-level input 2.
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WBR2 Datasheet Symbol Mode Power Typical Value Peak Value Unit IRF 54 Mbit/s 17.5 dBm 177 213 mA IRF 802.11n BW20 13 dBm 145 167 mA IRF MCS7 16.5 dBm 165 193 mA Table 3-4 Current consumption during constant receiving Symbol IRF IRF IRF Mode 802.11b 11 Mbit/s 802.11g 54 Mbit/s 802.11n HT20 MCS7 Typical Value Peak Value Unit 63 65 mA 65 67 mA 65 67 mA 3.
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WBR2 Datasheet 4. RF Features 4.1 Basic RF Features Table 4-1 Basic RF features Parameter Description Frequency range Bluetooth:2.400 GHz to 2.4835 GHz Wi-Fi:2.412 GHz to 2.484 GHz Wi-Fi standard IEEE 802.11b/g/n (channels 1 to 14,Ch1-11 for US/CA,Ch1-13 for EU/CN) 802.11b: 1, 2, 5.5, or 11 (Mbit/s) Data transmission rate 802.11g: 6, 9, 12, 18, 24, 36, 48, or 54 (Mbit/s) 802.11n: HT20 MCS0 to MCS7; Antenna type PCB antenna 4.
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WBR2 Datasheet 4.3 RX Performance Table 4-3 RX sensitivity Minimum Value Typical Value Maximum Value Unit 1 Mbit/s N/A –91 N/A dBm PER < 10%, 802.11g OFDM mode 54 Mbit/s N/A –75 N/A dBm PER < 10%, 802.11n OFDM mode MCS7 N/A –72 N/A dBm Parameter PER < 8%, 802.11b CCK mode 5. Antenna Information 5.1 Antenna Type WBR2 uses an onboard PCB antenna with a gain of 2.5 dBi. 5.
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WBR2 Datasheet Figure 6-1 WBR2 mechanical dimensions 6.
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WBR2 Datasheet Figure 6-3 Top and bottom views of the PCB to which WBR2 applies 6.3 Production Instructions 1. Preferentially use the wave soldering machine to solder the module, which is recommended for Tuya-developed modules that are through-hole mounted onto PCBs. Use hand soldering only when there is no operational wave soldering machine. Complete soldering within 24 hours after the module is unpacked. If not, vacuum pack the module again. (1) Required materials for soldering: i.
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WBR2 Datasheet (3) After the module is unpacked, the HIC shows that the 30% and higher rate circles are pink. (4) Production is not completed within 72 hours after the module is unpacked. (5) The module has been packed for more than six months. 3.
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WBR2 Datasheet Figure 6-4 Oven temperature curve Table 6-1 Recommended wave soldering temperature Wave Soldering Hand Soldering Preheat temperature 80°C to 130°C Wave soldering temperature 360±20°C Preheat time 75s to 100s Soldering time < 3s per point Contact time 3s to 5s N/A N/A Solder pot temperature 260±5°C N/A N/A Temperature increase rate ≤ 2°C per second N/A N/A Temperature drop rate ≤ 6°C per second N/A N/A 15
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WBR2 Datasheet 6.5 Storage Conditions Storage conditions for a delivered module are as follows: 1. The moisture-proof bag is placed in an environment where the temperature is below 30°C and the relative humidity is lower than 70%. 2. The shelf life of a dry-packaged product is six months from the date when the product is packaged and sealed. 3. The package contains a HIC.
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WBR2 Datasheet 17
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WBR2 Datasheet 7.
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WBR2 Datasheet 8. Appendix: Statement Federal Communications Commission (FCC) Declaration of Conformity 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.
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WBR2 Datasheet 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.