M5Atom Voice Intercom - Walkie Talkie

UPDATE 01.2023: Took all components inside an M5Stack Atom Proto Kit. Now it just looks like a real walkie talkie...

I was looking for a DIY in house voice intercom system. If you have a teenager living with you in a 3 levels house, you should have strong lungs and a sergeant voice to call him shouting for dinner or to tell him take out the trash; otherwise a hide and seek takes place inside the house to find him. Instead of calling him on the cellphone which he will never answer, I tried to find an intercom project to install in each room. Unfortunately alexa, google home mini etc are not in my native language and therefore are not sold in my country.

Searching on the internet, I came upon https://github.com/atomic14/esp32-walkie-talkie by atomic14 and that was exactly what I was looking for. Instead of using ESP32, I decided to go for the compact M5Atom Lite.

About the work mentioned here, all credits and thanks goes to @atomic14. I merely made some small changes to make it compliant to M5Atom.

Using longer jumper cables spend too much of my time; it creates enormous amount of noise on the microphone; so I needed to shorten all of it. I guess using a PCB like atomic14 and some capacitors to make a stable feed will be a lot better.

The good thing is you can either use UDP on WiFi or ESPNow. I decided to use ESPNow for protocol in order not to put an additional UDP stress on the local WiFi, ESPNow communicates directly to each other without usig WiFi (as far as I understand...)

Next Steps Needed:

• Prepare a PCB which also stabilizes power for less noise.
• Home Assistant interface (Possibilities are endless).
• Batteries ?