I need to connect Cover Earpiece with BT radio. Please can you advice me which of your Development Kits suit me the best? I assume to use CC2640 or maybe bigger chip. I have available three wires from Cover Earpiece with signal from MIC, speaker and ground and need to connect it through CC2640 with BT radio. To be able to key up the BT radio I need additionally to add PTT button to CC2640 and remote BT PTT.