https://github.com/Gruppio/Sonoff-Hom...
esptool.py \
-p /dev/cu.usbserial-00000000 \ put thr right port . default looks like this: -p $SONOFF_PORT \
--baud 115200 \
write_flash \
-fs 1MB \
-fm dout \
-ff 40m \
0x0 ./firmware/rboot.bin \
0x1000 ./firmware/blank_config.bin \
0x2000 ./firmware/Sonoff_$POWERON_STATE.bin