Arduino Project with Sensors and Threema

Threema is a messaging service with a focus on privacy and security. I have recently created a very simple C/C++ project for the Arduino Nano 33 IoT which will detect an open sensor and then after some configured delay, send a Threema message to recipients to let them know. It will also message when the sensor has closed again. This project uses a local WiFi access point and communicates with the Threema Gateway using HTTPs.

Check out the project (experimental stage) here.