get_tx_power
Description:
Warning: get_tx_power is deprecated since 1.2.
Average power of the last burst transmitted by the device, in units of 0.5 dBm.
Note: 
      
        
    
    WiMAX is no longer supported.
i.e. a TxPower of -11 represents an actual device TX power of -5.5 dBm. Has no meaning when the device is not connected.
Parameters:
| this | 
Returns:
| the TX power in dBm, or 0 |