Blog - Sonoff Pow R2 tasmota flash - 2020

09-Jan-2020

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Sonoff Pow R2 tasmota flash
Updated on: 09-01-2020

Flash attempt

Flashing tasmota (8.1.0) on a Sonoff Pow R2.

Flash error

		sudo python esptool.py --port /dev/ttyUSB0 write_flash -fs 1MB -fm dout 0x0 tasmota.bin 
		esptool.py v2.9-dev
		Serial port /dev/ttyUSB0
		Connecting...
		Detecting chip type... ESP8266
		Chip is ESP8266EX
		Features: WiFi
		Crystal is 26MHz
		MAC: xx:xx:xx:xx:xx:xx
		Uploading stub...

		A fatal error occurred: Failed to write to target RAM (result was 0105)

Solution

Pow R2 with 470ohm resistor

Add a 470ohm resistor between VCC (3.3v) and the "E-RX pin"

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