How do you manipulate the Tx power in the beacon app?
If I understand you correctly, you want to change the Tx-power of the beacon using the nRF Beacons app on your phone? Could you also tell me what device you are using? The nRF51822 Smart Beacon kit?
No, I want to set the tx power in the beacon-app code example in the SDK.
Use the sd_ble_gap_tx_power_set() function
So sticking this in ble_init() should do the trick with one of the accepted tx power values
