• pedestrian traffic light, already hacked to run on regular AC power socket
• 1 webduino
• 2 relay module 3V
• wires (Dupont and electric cables for 220V AC)
• USB 5V charger

1. install esp and relays to control each light individually
2. secure connections using veroboard or custom-made PCB
3. flash webduino using Arduino IDE
4. make it blink
5. make it blink according to received MQTT messages
6. enable wifi OTA upgrades
7. add wifimanager
8. make MQTT parameters configurable at runtime (prampec/IotWebConf? see this reddit thread also)

Code: https://git.interhacker.space/jeanjack/piedthon

The eps listens to a MQTT channel at sonic.fuz.re, described in mqtt.

For testing, using mqttcli: while :; do for I in {0..3}; do mqttcli pub --host sonic.fuz.re -m "$I" -t piedthon/input; sleep 0.5; done; done

(Describe pinout here, components…)