My First project an esp32 Remote Compost temp sensor that works with iot sim
A friend needed to remotely gather temperature reading of his composting and it was located 15km from any wifi, in rural ireland, so I took on the task. and I've never made anything with an esp 32 before, and bought my first soldering iron etc, and had the most fun ever.
Hardware
Walter ESP32 LTE board
DS18B20 temp sensor(s)
18650 batteries (1S2P)
tp4056 charging
external USB port and a switch
Simbase IoT SIM
3D printed PLA case + silicone seal and painted it with epoxy
Software
I used my cloud flare tunnel and my domain I already had to set up a website and coded it end to end with codex. The Walter wakes every hour and takes a reading and sends it to my website api that I have running on my webserver on a raspberry pi, stored in a small Sql lite Db.
I have all the code on my git hub repo if anyone wants to use it and can give you the stl files also.
I came across so many hurdles in it so if anyone is thinking of doing the same please ask. I settled on the water board because I tried the lilygo A7670G sim board before and it didn't work out.
tomato for scale
The enclosure was made with pla and i covered it ina layer of epoxy to seal it from the rain but it will be kept covered when used anyway