[Problem] Arduino and MeshConnect™ EM357 module to make one PCB

I want to make one PCB use ATMEGA328 and MeshConnect ZICM357SP2 module like smartthings shield

MeshConnect ZICM357SP2 buy from Digikey can connect to Smartthing Hub?

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Since ST has stopped selling the ThingShield, why not ask them for a copy of the firmware from the ThingShield for the CEL Zigbee processor? If you had that, you’d just need to flash the SP2 Zigbee chip and you’d be very close to being done.

That would be my suggestion. I asked for the firmware on the dev slack channel but they didn’t know if they were going to release it. It would be very nice to release a tiny chip that allows ST zigbee integration…