La Machine: The Useless Box reloaded with Erlang and AtomVM - Paul Guyot | Code BEAM Europe 2024

CodeSync · May 21, 2025, 1:00pm

This talk was recorded at Code BEAM Europe in October 2024. If you’re curious about our upcoming event, check https://codebebeameurope.com

Why and how Erlang and AtomVM were used to develop the personality of a lovable IoT device while maximizing its battery life.

The session includes video demos of La Machine (https://la-machine.fr/) and most importantly the Erlang journey towards the product:

hardware prototyping including a small ESP32c3 board powering it

usage of rebar3 to flash Erlang code on it

usage of console

usage of AtomVM API for GPIO and servo (PWM)

usage of CI with dialyzer and tests, including qemu

specific AtomVM API for ESP32 deep sleep

how a C library was ported as an AtomVM NIF for audio decoding, with a glimpse on AtomVM SMP builds (even if ESP32C3 is single core)

quick overview of memory management on AtomVM

Comments welcome! View the code-sync tag for more Code Sync talks!