This is a ESPHome based device which can interact with voice assistants configured in Home Assistant.
Initially, I thought about this kind of project when I saw $13 voice remote for Home Assistant article.
I tried to buy one M5Stack ATOM Echo Development Kit, but at that time it was out of stock almost everywhere I looked and it was pretty hard to source in my country. As a result, this idea transitioned to PENDING state until I manage to get an M5Stack or find a different approach.
Some time later, thanks to the gods of youtube algorithms 😄, I found a video where the author describes very well an alternative for the M5Stack ATOM kit using ESP32 based development board called Adafruit Feather v2 ESP32 board, which again was not very easy to find and source from my country.
So I decided to make my own adaptation of the project using plain ESP32 module and a custom PCB, because I like to design PCBs and I like when my projects are nice and tidy.
- ESP32-WROOM Module
- INMP441 I2S MEMS Microphone Module
- MAX98357A I2S Amplifier
- TPS63020 Buck-Boost Converter Module
- WS2812 Addressable LED
- A tactile switch that you like (I used B3F-4055)
- A small speaker of your choice (I used AS02008MR)
- TP4056 Li-Ion Charging Module
- A Li-Ion battery (I used one from an old iPhone due to the form factor)
- Other miscellaneous components like SMD Resistors, Capacitors, etc.
The case can be printed on a 3D printer without using any support, the files are attached in the "Case STL" folder.
Also here is the link to the OnShape project. Anybody can make a copy and edit it if you want to make some changes to the case that will better suit your use-case.
The printed circuit board was designed by me and I manufactured it using JLCPCB services and it turned out amazing.
And here is it assembled.
- Design a case adaptation for 18650 Li-Ion battery
- Remove the strapping pins (12, 15) to please my internal perfectionist and ESPHome code checker.
- Add Links to BOM