It seems that the folks at Espressif are doing their best to produce chips to fit every possible niche in the microcontroller ... in IEEE 802.15.4 to support ZigBee 3.x and Thread 1.x. The ESP32 ...

With that background, converting them from Bluetooth to Zigbee is not a huge leap. All that’s needed is the Zigbee firmware from [Ivan Belokobylskiy] aka [devbis] and to follow the steps put ...