Arduino can be built with C20/C++20 or C17/C++17 by switching to the latest gcc-arm-none-eabi. Below shows 2 different ways one using arduino-cli and the other using a Makefile included in this repo.

// Example sketch showing how to periodically poll a sensor and send the data // to a LoRaWAN network. // Based on simple_sensor_bme280.ino with the following modifications: // MCCI Arduino ...