Here's how easy it is to add a Bluetooth device to the cloud. In just a few minutes, we built a BLE-GATT example for the Arduino Nicla Sense ME board and had it sending data to the cloud.
Guest Timon Skerutsch writes about building a tank level sensor using Zephyr from start of his prototype, eschewing tools like Arduino and CircuitPython.
This experiment combines Golioth with Arduino and PlatformIO. The project builds on ESP-IDF, including Arduino as a component. It's not meant for production devices, but may be useful for those migrating from Arduino to ESP-IDF.