Utilize Zephyr PWM capabilities to drive a simple piezoelectric speaker to play notes. Golioth did this on the Nordic Semiconductor Thingy91 and can play selected songs over a cellular connection.
Try out the Golioth platform without writing or compiling any code. The newly released Thingy91 binary showcases the entire platform and guides users on how to structure their programs for success.
Here's how to control the nRF9160 cellular modem, and what to do about your connection to Golioth when the modem is turned off. When building cellular IoT devices, the modem is often the most costly component in terms of power budget. Connecting to an LTE network also takes time. In both cases, manual control of the LTE connection means you make all the decision on when and how the radio is used.
You can use VScode when working with Golioth's ESP-IDF SDK. This guide walks through the process of setting up the ESP-IDF extension for VScode, then shows how to build, flash, and run the golioth-basics example application.
