Output power using ESB with '840

[henryh]

I am developing an application to replace the nRF24LU01 with a nRF52840 and found that the SDK RF config does not support RF output power to +8dB (+4dB seems to be the max.).  Is this intentional or can I force it by writing the register directly to increase the power?

[Simonr]

Hi Andy

This seems like a documentation bug, and not something in the SDK. As of NCS v2.2.0 the TX power was changed to be an int8, so you should be able to set the TX power to whatever you'd like. +8dBm was never actually implemented in ESB on NCS, but should be possible to set if required.

Best regards,

Simon

[agoessling-magpie]

Thanks Simon,

I see that you can just input an arbitrary int8 for tx power.  The examples still use ESB_TX_POWER_NEG20DBM etc. from esb.h which does not contain a ESB_TX_POWER_8DBM definition, but if you just pass a raw int8 it works as expected.

Andy

[Simonr]

Hi Andy, glad to hear you got it working. The library was designed in a pretty bare bones way, so that's why it doesn't include every possible TX power define in the header file.

Best regards,

Simon