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LSC LMA35

by Unknown

Product page

Parameter Value
Board code lsc-lma35
MCU BK7231N
Manufacturer Beken
Series BK72XX
Frequency 120 MHz
Flash size 2 MiB
RAM size 256 KiB
Voltage 3.0V - 3.6V
I/O 15x GPIO, 6x PWM, 2x UART, 1x ADC
Wi-Fi 802.11 b/g/n
Bluetooth BLE v5.1

Usage

Board code: lsc-lma35

In platformio.ini:

[env:lsc-lma35]
platform = libretuya
board = lsc-lma35
framework = arduino

In ESPHome YAML:

libretuya:
  board: lsc-lma35
  framework:
    version: dev

Pinout

Pinout

Arduino Core pin mapping

No. Pin UART IĀ²C SPI PWM Other
D0 P26 PWM5
D1 P14 SCK
D2 P16 MOSI
D3 P24 PWM4
D4 P22 TDI
D5 P0 UART2_TX I2C2_SCL
D6 P23 TDO
D7 P8 PWM2
D8 P9 PWM3
D9 P21 I2C1_SDA TMS
D10 P6 PWM0
D11 P7 PWM1
D12 P10 UART1_RX
D13 P11 UART1_TX
D14 P1 UART2_RX I2C2_SDA
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.

Information

This board has no marking on the front side, only something that looks like PCB manufacturing info on the back; thus it was named based on these symbols.

It can be found in 'LSC Smart Connect Outdoor LED Strip', and is likely custom-made for this product.

The pinout was established by writing to and probing consecutive GPIOs, using the generic board definition.

Pins marked with '?' are currently unknown, with a possibility of being CEN. Pin 22 (P1/D14) is also not confirmed.