Skip to content

Generic - BK7231N (Tuya QFN32)

by Generic

Product page

Parameter Value
Board code generic-bk7231n-qfn32-tuya
MCU BK7231N
Manufacturer Beken
Series BK72XX
Frequency 120 MHz
Flash size 2 MiB
RAM size 256 KiB
Voltage 3.0V - 3.6V
I/O 19x GPIO, 6x PWM, 2x UART, 1x ADC
Wi-Fi 802.11 b/g/n
Bluetooth BLE v5.1

Usage

Board code: generic-bk7231n-qfn32-tuya

In platformio.ini:

[env:generic-bk7231n-qfn32-tuya]
platform = libretuya
board = generic-bk7231n-qfn32-tuya
framework = arduino

In ESPHome YAML:

libretuya:
  board: generic-bk7231n-qfn32-tuya
  framework:
    version: dev

Arduino Core pin mapping

No. Pin UART IĀ²C SPI PWM Other
D0 P0 UART2_TX I2C2_SCL
D1 P1 UART2_RX I2C2_SDA
D2 P6 PWM0
D3 P7 PWM1
D4 P8 PWM2
D5 P9 PWM3
D6 P10 UART1_RX
D7 P11 UART1_TX
D8 P14 SCK
D9 P15 CS
D10 P16 MOSI
D11 P17 MISO
D12 P20 I2C1_SCL TCK
D13 P21 I2C1_SDA TMS
D14 P22 TDI
D15 P23 TDO
D16 P24 PWM4
D17 P26 PWM5
D18 P28
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 / 0x119000 0x12A000
OTA Image 0x12A000 664 KiB / 0xA6000 0x1D0000
Calibration 0x1D0000 4 KiB / 0x1000 0x1D1000
Network Data 0x1D1000 4 KiB / 0x1000 0x1D2000
TLV Store 0x1D2000 4 KiB / 0x1000 0x1D3000
Key-Value Store 0x1D3000 32 KiB / 0x8000 0x1DB000
User Data 0x1DB000 148 KiB / 0x25000 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.