[chbot] ESP8266 on a power diet

[Darran]

This is a really cool project. They replace the ESP8266 TCP stack with a 
LWIP stack and cut the network connection time down to milliseconds from 
6-10 seconds, saving a massive amount of power over time.

OpenWRT can read the packets, with minor mods, which contain just your 
data (telemetry). This puts the ESP8266 back into the battery powered world.

https://hackaday.com/2018/01/22/how-low-can-an-esp8266-go/