Sonoff switches

Espurna is the firmware that's been flashed onto the Sonoff switches (both the basic model and the POW2 power measuring units) that can be wired into the mains cable supply of any device (fan, computer, laser cutter, kettle, etc).

Table of known devices

The ESPURNA-XXXXX is the last three bytes of the mac-address in hex and used to generate the MQTT topic.

host	device	broker	thing	mDNS
ESPURNA_3B6F59	POW	sensorcity.io	Dinky heater	Y
ESPURNA-8E010B	POW_R2	mqtt.local	VR computer	Y
ESPURNA-8E30FD	POW_R2	mqtt.local	Sophia laser	Y
ESPURNA-??????	POW_R2	mqtt.local	Gerald laser
ESPURNA_4EAD1D	POW	mqtt.local	Coffee machine
ESPURNA_8DF40E	POW_R2	mqtt.local	Coffee machine (2)	Y
ESPURNA-A7A42B	BASIC	mqtt.local	Electric Hob
ESPURNA-547CD9	POW_R2	mqtt.local	Ultimaker Felicity	Y
ESPURNA-8DFE16	POW_R2	mqtt.local	Ultimaker Adam	Y
ESPURNA-5483B8	POW_R2	mqtt.local	CNC Machine	Y
ESPURNA-6821B6	POW_R2	mqtt.local	Fridge	Y
ESPURNA-B1DB1E	POW_R2	mqtt.local	Creality CR10_S	Y
ESPURNA-32B7B9	POW_R2	mqtt.local	DoES Dishwasher	Y

Operating through a webpage or MQTT

All devices are set to log on to the "DoESLiverpool" wifi network and connect to the "mqtt.local" broker. You can verify these ip-numbers with the command:

mosquitto_sub -v -h mqtt.local -t "+/ip"

Commands to set the LED and relay are of the form:

mosquitto_pub -t ESPURNA_A6F5FA/[relay|led]/+/set -m [1|0]

The standard release builds for espurna do not enable mDNS (which is required to convert "mqtt.local" into the ipnumber of the broker on our network.

See also Sonoff provisioning