Strictly speaking, a Theremin uses a pair of antennae that act as capacitors in a specific R/C circuit. Looking at [aritrakdebnath2003]’s MIDI THEREMIN, we see it works differently, but it does play ...

An Arduino library for the u-blox SARA-R5 LTE-M / NB-IoT modules with secure cloud, as used on the SparkFun MicroMod Asset Tracker, the SparkFun LTE GNSS Breakout - SARA-R5, and the SparkFun MicroMod ...