Change/Select BLE channels

[Ih3b]

Hello everyone,

We are using the NUS service to transmit some data. To comply with certain CEM tests and regulations, we need the ability to configure BLE to publish on specific frequencies for some test purposes.

Since BLE has 40 channels—3 for advertising and 37 for data transmission—we would like to know if it is possible to manually select these channels, deactivate certain ones, etc..

PS: We are using NUS BLE service 

Thanks in advance for your help! 

Best regards 

[Emil Lenngren]

I think what you want is docs.nordicsemi.com/.../README.html. Then you can test to send various patterns on various channels. When you are done with testing, reflash your device with your normal firmware.

[Kenneth]

The Direct Test Mode example can be used, but also the radio test example can be used for regulatory testing. Some pointers in this case:
RE: Example code for fixed frequency for CE certification 

Kenneth

[Ih3b]

Thanks for these examples that I will definitely look into in details. For info, The test that we would like to do are directive RED : fr.m.wikipedia.org/.../Directive_RED