Best way to change gain in example: ble_app_hrs_pca10056_s140

[B4Me]

Hi everyone I'm doing some basic test to verify the correct platform for a future project, we need ble long range, therefor we are testing the NRF52840-PDK I have loaded the ble_app_hrs_pca10056_s140 example, through SES. I can understand the default gain should be 0 dbm. Where is the best location to set the set_tx_power function, so I can test it with max gain on PA and LNA

[Joakim Jakobsen]

Hi B4Me!

You are correct, the default transmit power is 0 dBm. We can see that from the TX Power register.

You can use the sd_ble_gap_tx_power_set() function to set the radio's transmit power.
My suggestion would be to set the tx power as soon as the device is advertising.

Best regards,
Joakim.

[B4Me]

Thanks for the replay, I will try to set it. Can I just write sd_ble_gap_tx_power_set(9); in the first of main maybe ?

[Joakim Jakobsen]

Hi!
You wont be able to set the tx power before the softdevice is enabled. You can put the tx power set function after the ble_stack_init().
Best regards.

[B4Me]

Thanks, it worked :D

[Joakim Jakobsen]

That's great! Happy to help :)