Technical barrier to target low cost micro controllers can be too high for many developers already used to high level API. But did you know that those devices can support many operating systems like NuttX inspired by POSIX (same for Linux), but it goes even behind than C APIs, even JavaScript runtimes like IoT.js can be supported too. IoT.js can also support JS community modules such as Generic-sensor-lite to support sensors and actuators or webthing-iotjs to enable REST API for embedded applications.