WB2L Wi-Fi Module
by Tuya Inc.
| Parameter | Value |
|---|---|
| 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 |
Pinout
Arduino Core pin mapping
| No. | Pin | UART | I²C | SPI | 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 |
| TLV Store | 0x1E0000 | 4 KiB / 0x1000 | 0x1E1000 |
| Network Data | 0x1E1000 | 8 KiB / 0x2000 | 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.