I have just received my order fro you guys and I have a couple of questions.
Do you have any details for the serial headers on the SONOFF/Slampher?
Also is it possible to upload my own firmware to the devices via the serial I have various other ESP8266 modules that I write code for and I would like to also add this code to the modules.
You can have a look at the low power supply Sonoff version: https://www.itead.cc/sonoff-sv.html
Seriah = Serial doh!
We will have Sonoff Dev to come soon, this new module supports programming your own firmware, but other sonoff version and slampher do not support this function. So please stay tuned