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Overview

We are hoping to flash Tasmota firmware on our Treatlife DS01C Dimmer switch.

The Treatlife DS01 uses a TYWE3S Chip (ESP8266):

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This dimmer has an MCU connected to the TYWE3S over the RX/TX pins.

MCU: BYD - BF7612AM28T W9He

BF7612AMXXE-CN-MCU-Datasheet

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Keep MCU disabled is by identifying the NRST/RST (Reset) pin of the MCU from its datasheet and connect it to GND for the entire flashing process. This will keep MCU disabled while you flash TYWE3S. If there are some contacts or test points in switches that connect to the MCU, you might be lucky to find contacts for RST that you can easily solder onto.

From the above picture, it appears that the MCU differs from the one in the Treatlife DS01C.

Cutting the Rx/TX pin on MCU

Cutting the RX/TX pins on the MCU was reported to help with flashing the TYWE3S chip without desoldering.

Pictures

Tracing

Flashing

This chip is essentially an ESP8266. The ESP-12 Chip has the same pinout. 

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