How To Swtich FSC-BT909 Bluetooth Module To AT Command Mode ?

- Nov 21, 2019-

1.When FSC-BT909 module is disconnected.

   At this status you can send ''TPMODE=0'' to enter ''AT Command''.

2. When FSC-BT909 module establish connection, then it will auto enter throughput mode.
    At this status, you can draw pin 9 to high level, then it will work at AT mode.


For more details about FSC-BT909 module: