Q: I am looking for a zigbee stack for nrf52840 that I can manage via the UART. All the logic is on the main mcu and the wireless soc just listens to the uart and does whatever is asked as a coordinator. Do you have such a stack?
Nordic suggest ZBOSS NCP as a part of their SDK https://developer.nordicsemi.com/nRF_Connect_SDK/doc/latest/nrf/protocols/zigbee/architectures.html#ug-zigbee-platform-design-ncp-details
