WR3N Wi-Fi Module

by Tuya Inc.

Product page

• Info & flashing guide
• Debugging

Parameter	Value
Board code	wr3n
MCU	RTL8710BN
Manufacturer	Realtek
Series	AmebaZ
Frequency	125 MHz
Flash size	2 MiB
RAM size	256 KiB
Voltage	3.0V - 3.6V
I/O	9x GPIO, 5x PWM, 2x UART, 1x ADC
Wi-Fi	802.11 b/g/n
FCC ID	2ANDL-WR3N

Usage

Board code: wr3n

In platformio.ini:

[env:wr3n]
platform = libretiny
board = wr3n
framework = arduino

In ESPHome YAML:

rtl87xx:
  board: wr3n

Pinout

Pin functions

Name(s)	UART	I²C	SPI	PWM	Other
PA00				PWM2
PA05				PWM4
PA12				PWM3
PA14				PWM0	SWCLK
PA15				PWM1	SWDIO
PA18	RX0	SCL1	SCK0, SCK1
PA23	TX0	SDA1	MOSI0, MOSI1	PWM0
PA29	RX2	SCL0		PWM4
PA30	TX2	SDA0		PWM4

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	32 KiB / 0x8000	0x19D000
User Data	0x19D000	392 KiB / 0x62000	0x1FF000
Tuya Storage	0x1EB000	84 KiB / 0x15000	0x200000
RDP	0x1FF000	4 KiB / 0x1000	0x200000