WB2L Wi-Fi Module

by Tuya Inc.

Parameter	Value
Board code	`wb2l`
MCU	BK7231T
Manufacturer	Beken
Series	BK72XX
Frequency	120 MHz
Flash size	2 MiB
RAM size	256 KiB
Voltage	3.0V - 3.6V
I/O	13x GPIO, 5x PWM, 2x UART, 1x ADC
Wi-Fi	802.11 b/g/n
Bluetooth	BLE v4.2
FCC ID	2ANDL-WB2L

Usage

Board code: wb2l

In platformio.ini:

[env:wb2l]
platform = libretuya
board = wb2l
framework = arduino

In ESPHome YAML:

libretuya:
  board: wb2l
  framework:
    version: dev

Pinout

Arduino Core pin mapping

No.	Pin	UART	I²C	PWM	Other
D0	P8			PWM2
D1	P7			PWM1
D2	P6			PWM0
D3	P26			PWM5
D4	P24			PWM4
D5	P10	UART1_RX
D6	P11	UART1_TX
D7	P1	UART2_RX	I2C2_SDA
D8	P0	UART2_TX	I2C2_SCL
D9	P20		I2C1_SCL		TCK
D10	P21		I2C1_SDA		TMS
D11	P23				TDO
D12	P22				TDI
A0	P23, ADC3

Flash memory map

Flash size: 2 MiB / 2,097,152 B / 0x200000

Hex values are in bytes.

Name	Start	Length	End
Bootloader	0x000000	68 KiB / 0x11000	0x011000
App Image	0x011000	1.1 MiB / 0x121000	0x132000
OTA Image	0x132000	664 KiB / 0xA6000	0x1D8000
Key-Value Store	0x1D8000	32 KiB / 0x8000	0x1E0000
Calibration	0x1E0000	4 KiB / 0x1000	0x1E1000
TLV Store	0x1E1000	4 KiB / 0x1000	0x1E2000
Network Data	0x1E2000	4 KiB / 0x1000	0x1E3000
User Data	0x1E3000	116 KiB / 0x1D000	0x200000

Bootloader and app partitions contain CRC16 sums every 32 bytes. That results in the actual flash offsets/sizes not aligned to sector boundaries. To simplify calculations, the values shown in the table (extracted from bootloader's partition table) were aligned to 4096 bytes.