La Machine: The Useless Box reloaded with Erlang and AtomVM

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