IoT Central Ready cookbook to add a new sensor?

indatafarm you might want to look at this doc: https://docs.microsoft.com/en-us/azure/iot-central/concepts-connectivity

it describe how to handle authentication then explains how Telemetry, Device Twin a Direct Methods are to be implemented on the device side, then points to some samples. Note that IoT Central is using IoT Hub under the hood, so all samples for IoT Hub apply as well as long as telemetry format is using the right JSON syntax (see samples mentioned above) and the device twin properties are dealt with according to the convention established in IoT Central device template.

Hope this helps