Send a GetBatteryLevel message.
This method sends a GetBatteryLevel direct command to the device on the specified connection.
- Parameters:
-
| _conn | The connection slot (0..4). Connections 0 through 3 are for bluetooth connections. Connection 4 refers to the RS485 hi-speed port. See Remote connection constants. |
| _value | The battery level value. |
| _result | A char value indicating whether the function call succeeded or not. |