I don't use Zephyr on ESP32. I try to use it on the nRF91. And there is a lot more to it if you actually want to build a device that has a few sensors, does a

I don't use Zephyr on ESP32. I try to use it on the nRF91. And there is a lot more to it if you actually want to build a device that has a few sensors, does a bit of mobile networking AND you need to develop this over time and upgrade the SDK from time to time.