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CC2541: Problems Connection CC2541 KeyFob with Smartphone Android

Part Number: CC2541

Hello,

I am designing a circuit with the CC2541 that connects to SmartPhone using Android. I succeeded in connecting the Android  app "Sensor Tag Thing" with "Sensor Tag CC2541".

But, I was not successful with testing using the KeyFob CC2541 hardware with Sensor Tag's adapted firmware.

Does anyone know what it takes to run a firmware on KeyFob that connects the Android App?

Thanks!