1. Send ''AT+PROFILE=83'' swtich to master transmit mode.
2. Send AT+SCAN=1 to scan for nearby bluetooth devices.
3.Send AT+HFPCONN=MAC to connect to target BT device.
4.Send AT+HFPAUDIO=1 to activate HFP protocol
- Jul 20, 2020-
1. Send ''AT+PROFILE=83'' swtich to master transmit mode.
2. Send AT+SCAN=1 to scan for nearby bluetooth devices.
3.Send AT+HFPCONN=MAC to connect to target BT device.
4.Send AT+HFPAUDIO=1 to activate HFP protocol