TUYA WB2L User manual

WB2L Module Datasheet
Version: 20220729
Online Version

Contents
Contents
1 Overview 2
1.1 Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
1.2 Applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
1.3 Change history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
2 Module interfaces 4
2.1 Dimensions and footprint . . . . . . . . . . . . . . . . . . . . . . . . 4
2.2 Interface pin de󰍓nition . . . . . . . . . . . . . . . . . . . . . . . . . . 5
2.3 Test pin de󰍓nition . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
3 Electrical parameters 8
3.1 Absolute electrical parameters . . . . . . . . . . . . . . . . . . . . . 8
3.2 Working conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
3.3 Current consumption during constant transmission and receiving . . . 9
3.4 Operating current . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
4 RF features 11
4.1 Basic RF features . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
4.2 TX performance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
4.3 RX performance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
5 Antenna 13
5.1 Antenna type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
5.2 Antenna interference reduction . . . . . . . . . . . . . . . . . . . . . 13
6 Packaging Information and Production Instructions 16
6.1 Mechanical Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . 16
6.2 Side view . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
6.3 Recommended schematic encapsulation . . . . . . . . . . . . . . . . 17
6.4 Recommended PCB Encapsulation-Pin header . . . . . . . . . . . . . . 17
6.5 Recommended PCB Encapsulation-SMT . . . . . . . . . . . . . . . . . 18
6.6 Production instructions . . . . . . . . . . . . . . . . . . . . . . . . . 19
6.7 Recommended oven temperature curve . . . . . . . . . . . . . . . . . 20
6.8 Storage conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
I

Contents
7 MOQ and packing information 25
8 Appendix: Statement 26
II

Contents
WB2L is a low-power embedded Wi-Fi and Bluetooth LE module that Tuya has devel-
oped. It consists of a highly integrated RF chip (BK7231T) and several peripheral
components, with an embedded Wi-Fi network protocol stack and robust library func-
tions.
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1 Overview
1 Overview
WB2L is embedded with a low-power 32-bit microcontroller unit (MCU), 2 MB 󰍔ash
memory, 256 KB static random-access memory (SRAM), and extensive peripher-
als.
WB2L is an RTOS platform that integrates all function libraries of the Wi-Fi MAC and
TCP/IP protocols. You can develop embedded Wi-Fi products as required.
1.1 Features
• Embedded low-power 32-bit CPU, which can also function as an application
processor
• Clock rate: 120 MHz
• Operating voltage: 3.0 V to 3.6 V
• Peripherals: 5 GPIOs
• Wi-Fi connectivity
–802.11 b/g/n
–Channels 1 to 14 at 2.4 GHz
–Support WEP, WPA/WPA2, WPA/WPA2 PSK (AES),WPA3 security modes
–Up to +17 dBm output power in 802.11b mode
–EZ and AP net pairing modes for Android and iOS devices
–Onboard PCB antenna with a gain of 1 dBi
–Operating temperature: –40°C to +105°C
• Bluetooth LE connectivity
–Support for Bluetooth LE 4.2
–Maximum output power of +7 dBm
–Onboard PCB antenna with a gain of 1 dBi
1.2 Applications
• Intelligent building
• Smart household and home appliances
• Smart socket and light
• Industrial wireless control
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1 Overview
• Baby monitor
• Network camera
• Intelligent bus
1.3 Change history
Date Description Version after change
2019-11-07 This is the 󰍓rst release. V1.0.0
2019-11-23 Updated antenna gain. V1.0.1
2019-12-04 Updated power
consumption of
distribution network.
V1.0.2
2019-12-10 Updated Bluetooth
related parameters.
V1.0.3
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2 Module interfaces
2 Module interfaces
2.1 Dimensions and footprint
WB2L has one row of pins with a 2±0.1 mm pin spacing.
The WB2L dimensions (Lx Wx H) are 17.3±0.35 mm x 15±0.35 mm x 2.8±0.15 mm.
The following 󰍓gure shows the WB2L front and rear views.
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2 Module interfaces
2.2 Interface pin denition
Pin No. Symbol I/O type Function
1 PWM2 I/O Hardware PWM
pin, which is
connected to the
P8/BT_ACTIVE/PWM2
(Pin24)
2 PWM1 I/O Hardware PWM
pin, which is
connected to the
P7/WIFI_ACTIVE/PWM1
(Pin23)
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2 Module interfaces
Pin No. Symbol I/O type Function
3 PWM0 I/O Hardware PWM
pin, which is
connected to the
P6/CLK13M/PWM0
(Pin22)
4 PWM5 I/O Hardware PWM
pin, which is
connected to the
P26/IRDA/PWM5
(Pin15)
5 PWM4 I/O Hardware PWM
pin, which is
connected to the
P24/LPO_CLK/PWM4
(Pin16)
6 GND P Ground pin
7 3V3 P Power supply pin
(3.3 V)
2.3 Test pin denition
Pin No. Symbol I/O type Function
- GND P Ground pin
- RST I Reset pin, Default
high level, pull
down e󰍒ective
- U1_TXD I/O UART1_TX, User
serial port
- U1_RXD I/O UART1_RX, User
serial port
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2 Module interfaces
Pin No. Symbol I/O type Function
- U2_TXD I/O UART2_TX, LOG
serial port
- U2_RXD I/O UART2_RX, LOG
serial port
- F_SCK I/O Clock pin when
data is
downloaded from
the 󰍔ash memory,
which is connected
to the P20 pin on
the internal IC
- F_CSN I/O Command
enabling pin when
data is
downloaded from
the 󰍔ash memory,
which is connected
to the P21 pin on
the internal IC
- F_SI I/O Data input pin
when data is
downloaded from
the 󰍔ash memory,
which is connected
to the P22 pin on
the internal IC
- F_SO I/O Data output pin
when data is
downloaded from
the 󰍔ash memory,
which is connected
to the P23 pin on
the internal IC
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