wifi relay

turn the power on or off for a machine.

https://bitraf.no/wiki/Verkt%C3%B8yl%C3%A5s

to do

open / close relay on lock / unlock messages
publish lock / unlock status
protect mqtt topics
enable over-the-air firmware updates
measure and report whether the machine is running

example commands

subscribe to changes:

mosquitto_sub -h mqtt.bitraf.no -v -t "bitraf/machine-access/pick_and_place/is_locked"

lock pick and place machine:

mosquitto_pub -h mqtt.bitraf.no -m "" -t "bitraf/machine-access/pick_and_place/lock"

unlock pick and place machine:

mosquitto_pub -h mqtt.bitraf.no -m "" -t "bitraf/machine-access/pick_and_place/unlock"

dependencies

ESP8266WiFi (included with ESP8266 "board"): https://github.com/esp8266/Arduino
PubSubClient (included): https://github.com/knolleary/pubsubclient