Newbie tutorial for upgrading Sonoff Pow firmware

[jumpjack]

I am attempting to write a step by step tutorial about how to upgrade the Sonoff Pow firmware, but I'm in trouble figuring out the exact steps...
https://jumpjack.wordpress.com/2016/11/08/arduino-esp8266-sonoff-e-mqtt/

[arendst]

See wiki

[jumpjack]

wiki is far from beeing useful for newbies.