SPP AT Commands
BTM-222 SPP AT CommandsThe default settings of the BTM-222 bluetooth module are as follows:
Baud rate: 19200, 8 data bits, none parity, 1 stop bit, PIN: 1234, module is set as a slave device, the module is discoverable by other bluetooth devices.
AT commands should be sent character by character (with a delay at least tens of ms). Please keep in mind that after each AT command you have to send character!.
| Checking the status of the module: |
| AT - in reply we get "OK" if it is working properly |
| ATI1 - displays all the settings of the BTM-222 module |
| Command? - display the value stored in a memory (relating to the given command) e.g. ATL? - display the current baud rate |
| Name: |
| ATN=BTM222 - sets the name of the module |
| ATN? - returns the name of the device |
| PIN: |
| ATP=12345 - sets a new PIN to "12345" |
| ATP0 - turn off the PIN code authorization |
| ATP? - returns the current PIN number (default is "1234") |
| Baud rate of COM port: |
| ATL0 - 4800 bps |
| ATL1 - 9600 bps |
| ATL2 - 19200 bps (default) |
| ATL3 - 38400 bps |
| ATL4 - 57600 bps |
| ATL5 - 115200 bps |
| ATL6 - 320,4 Kbps |
| ATL7 - 460,8 Kbps |
| ATL? - return the current baud rate |
| Echo: |
| ATE0 - turning off the echo |
| ATE1 - turning on the echo (default) |