It Works! Wireless Thermostat Using ESP-NOW Protocol

Celebrating the success here on the wireless thermostat experiment.

The purpose of this effort was simply to get a wireless protocol working to send/receive sensor data from one ESP32 MCU to another, and display the data on a screen attached to the receving MCU. The protocol selected for this communication was ESP-NOW which was developed by Espressif – the makers of the ESP32. I chose a DHT22 thermostat module for the sensor because I had one available and had not used one in a project before. It made sense to try it out with this project.

For this experiment, I relied heavily on details form the dronebotworkshop website which was extremely helpful in acquiring the knowledge necessary to get it done.

After shooting the above video, i slapped a battery pack on the remote MCU and put it outside.

Before moving outside, the temperature registered at 70.88 degrees and a humity of 60.9%

After moving the sensor outside, we saw 68.36 degrees and a humidity of 77.90%.

So now I need to make a decision. I have a few different directions I can go with this.

1. Set up a second receiver and have the sensor transmit data to both receivers
2. Set up a second transmitter and sensor and update the receiver to process data from multiple transmiters.
3. Ghange the sensor to a GPS sensor and update the receiver to receive and process GPS data.

I’m not sure what I’m going to do at this point. Leaning towards breaking out the GPS module and seeing what I can get going….