I want to make 100 useful IOT projects. This is the first one.
I was inspired by Mick Make’s IOT mailbox project but it was a bit too complicated for my liking with a MQTT message broker required. My project consists of:
- Wemos ESP8266 mini
- External antenna
- Plastic box
- Power supply (18650 battery powered)
- Line follow sensor (simple light sensor)
I created the project is a few hours. The largest time consumer was troubleshooting WiFi connectivity. The free IFTTT service is fantastic but it is very slow. Up to 30 mins to get a notification.
The largest limitation is the notifications continue as it does not track state.
Source code is here.Source code is here.