Official Losant + Particle Setup Tutorial

[RWB]

This post explains how to format webhook data using the snprintf function:

Storing very infrequent data while Photon offline (not cloud connected)

@charrold303 The C-String used to confuse me also but after playing around a bit I now see how simple they are to work with to format data before sending it in a Particle Publish. Here is how I setup a C-String (Char array) in my code to send GPS Data & Battery Voltage to Losant. First define your Char Array and change publishStateString to what ever you want it to be: [image] The 256 is the max byte size of the array which is the max size of a Particle Publish payload +1 Now I use the sn…