For ESPs I recently had quite some fun prototyping using MicroPython. REPL directly on the controller so I can try things out, a mechanism to "mount" a local di

For ESPs I recently had quite some fun prototyping using MicroPython. REPL directly on the controller so I can try things out, a mechanism to "mount" a local directory on controller so larger things can be tested easily etc. and then support for many of the features (I2C, SPI, Wifi, BLE, ... all work, one can even send binary for the low energy core on the ESP32, while some things weirdly are missing, like support for the temperature sensor on the ESP32-C2)