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WR2L Wi-Fi Module

by Tuya Inc.

Product page

Parameter Value
Board code wr2l
MCU RTL8710BX
Manufacturer Realtek
Series AmebaZ
Frequency 62.5 MHz
Flash size 2 MiB
RAM size 256 KiB
Voltage 3.0V - 3.6V
I/O 5x GPIO, 4x PWM, 1x UART, 1x ADC
Wi-Fi 802.11 b/g/n
FCC ID 2ANDL-WR2L

Usage

Board code: wr2l

In platformio.ini:

[env:wr2l]
platform = libretuya
board = wr2l
framework = arduino

In ESPHome YAML:

libretuya:
  board: wr2l
  framework:
    version: dev

Pinout

Pinout

Arduino Core pin mapping

No. Pin UART IĀ²C SPI PWM Other
D0 PA15 PWM1 SWDIO
D1 PA14 PWM0 SWCLK
D2 PA05 PWM4
D3 PA19 UART0_CTS I2C0_SDA SPI0_CS, SPI1_CS
D4 PA12 PWM3
A0 PA19, ADC1

Flash memory map

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

Hex values are in bytes.

Name Start Length End
Boot XIP 0x000000 16 KiB / 0x4000 0x004000
Boot RAM 0x004000 16 KiB / 0x4000 0x008000
(reserved) 0x008000 4 KiB / 0x1000 0x009000
System Data 0x009000 4 KiB / 0x1000 0x00A000
Calibration 0x00A000 4 KiB / 0x1000 0x00B000
OTA1 Image 0x00B000 788 KiB / 0xC5000 0x0D0000
OTA2 Image 0x0D0000 788 KiB / 0xC5000 0x195000
Key-Value Store 0x195000 24 KiB / 0x6000 0x19B000
User Data 0x19B000 400 KiB / 0x64000 0x1FF000
RDP 0x1FF000 4 KiB / 0x1000 0x200000

RDP is most likely not used in Tuya firmwares, as the System Data partition contains an incorrect offset 0xFF000 for RDP, which is in the middle of OTA2 image.

Additionally, Tuya firmware uses an encrypted KV or file storage, which resides at the end of flash memory. This seems to overlap system RDP area.