I got the same problem:
speed 38400 baud; line = 0;
min = 1; time = 0;
-brkint -icrnl -imaxbel
-isig -icanon -iexten -echo -echoe -echok -echoctl -echoke
root@raspberry:/home/pi/espurna# time ./esptool.py -p /dev/serial0 write_flash 0x1000 espurna-1.13.2-itead-sonoff-th.bin
Serial port /dev/serial0
Detecting chip type... ESP8266
Chip is ESP8266EX
A fatal error occurred: Failed to write to target RAM (result was 0107)
I am using Raspberry Pi GPIO TXD0, RXD0 and GND. Sonoff is powered by its own power supply (240VAC, I am a professional electrician).
Any quesses what can cause this ?
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