Miboxer TRI-C1WR Dimmer Module Dimmer Module (TRI-C1WR)
Miboxer TRI-C1WR Dimmer Module

Available from:


Install method:
Replace module

GPIO #Component
GPIO00 None
GPIO01 None
GPIO02 None
GPIO03 None
GPIO04 None
GPIO05 None
GPIO06 None
GPIO07 None
GPIO08 None
GPIO09 None
GPIO10 None
GPIO12 None
GPIO13 None
GPIO18 None
GPIO19 None
GPIO20 Tuya Rx
GPIO21 Tuya Tx
Configuration for ESP32-C3
{"NAME":"Miboxer-TRI-C1WR","GPIO":[0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,2304,2272],"FLAG":0,"BASE":54,"CMND":"SO97 1 | TuyaMCU 11,20 | TuyaMCU 98,21 | TuyaMCU 21,22 | TuyaMCU 12,102 | TuyaMCU 22,103 | DimmerRange 10,1000"}
This device uses WB2S module which needs to be replaced with ESP-02S, WT-01N or WT32C3-01N. Besides the module, this process will require a heat gun, soldering tools and moderate soldering skill.

Identified with MCU Product ID: {"p":"ws3odtueeha5yjln","v":"1.0.1","m":0}.


PCB Bottom

Please read TuyaMCU article to understand the terminology and configuration process.


The Miboxer TRI-C1WR Dimmer Module uses the UART to communicate with Tuya MCU. This Dimmer Module comes with a CB2S chip and requires replacement in order to be used with Tasmota.

The TuyaMCU on board requires the following settings.

Backlog TuyaMCU 11,20; TuyaMCU 98,21; TuyaMCU 21,22; TuyaMCU 12,102; TuyaMCU 22,103; TuyaMCU 13,104; DimmerRange 10,1000


dpID Function Datatype Additional Comments
20 Dimmer Switch Switch  
21 Work Mode? Enum 0 = Mode 1, 1 = Mode 2, 2 = Mode 3, Range 0 .. 4?
22 Dimmer Level Integer Value Range: 0 .. 1000
103 Min Brightness Integer Value Range: 0 .. 255
102 Breaker Mode Switch  
104 TRIAC Mode Leading Edge? Switch  
105 undocumented? Enum 0 = Mode 1, 1 = Mode 2, 2 = Mode 3, Range 0 .. 4?

Serial Flashing

Please see the Hardware Preparation page for general instructions.

Flash using Tasmota Web installer and select ESP32-C3 option.

To put ESP32-C3 in flash mode EN needs to be pulled high and GPIO9 need to be pulled low. May take a 2-3 attempts, but just disconnect and reconnect 3V3 while keeping GPIO9 pulled low and click the retry button again until it works.

Any CP2102 or CH340 based USB to serial adapter is fine.

ESP32 Pin USB Serial Pin Comments
3V3 3V3 Connect to dedicated 3V3 1A power supply if encountering brown out
IO9 Ground Round contact pad on back of board, pull low BEFORE attaching 3V3
IO8 3V3 Could not find this pin, but it didn’t seem to be required
EN 3V3 Pull high to enable ESP32 (do not leave floating)