I am using ATSAMD10c14A processor to pair with HC-05Bt module.
First, I connected my SERCOM pins to UART->USB module and tested the connectivity with my PC. I was able to send/receive data from pc.
Then I connected the SERCOM pins to HC-05BT
Tx ---------- Rx
Rx ----------- Tx
Now when I power up my board having KEY pin of HC-05BT LOW, I see the HC-05 Bluetooth is shown in my Mobile and i could even pair with.
However while power on if I pull the KEY pin HIGH (to enter to command mode) I see the HC-05 Bluetooth profile in my mobile but unable to pair with.
Is it so that HC-05 can not be paired in command mode?
Is the Tx-RX (cross) connection right? or it should be Tx--->Tx and Rx---Rx (looks illogical but :()