About frequency hopping

RE: About frequency hopping

wzszzxj — Mon, 09 Nov 2020 03:02:09 GMT

Thank you for your reply,Pls close this topic.

RE: About frequency hopping

Kenneth — Thu, 05 Nov 2020 11:05:09 GMT

The radio will use the frequency configured, but make sure that you are in idle mode when changing frequency. You can also set and readback the value, just to make sure it is configured right. You may try to add some timing delays in your code for test to see if that impact you issue.

Best regards,
Kenneth

RE: About frequency hopping

wzszzxj — Thu, 05 Nov 2020 02:09:32 GMT

Yes,My setting hopping channel is channel37 3 21 14.When frequency is changed from channel 37 to 3,it alway jumps to channel 21 instead of channel 3.And that is not my design intent. If I change sequence as 37,25,21,14, that would be right.It means there is difference between changing channel37 to 3,and cahnging cahnging cahannel 37 to 25?

RE: About frequency hopping

Kenneth — Wed, 04 Nov 2020 14:43:26 GMT

For a receiver you would need to call nrf_esb_stop_rx(), wait for nrf_esb_is_idle(), and then you can call nrf_esb_set_rf_channel().

RE: About frequency hopping

wzszzxj — Wed, 04 Nov 2020 12:59:03 GMT

If i do not call the fuction nrf_esb_diable() before change the channel,it would return failure in calling the fuction nrf_esb_set_rf_channel().

RE: About frequency hopping

Kenneth — Wed, 04 Nov 2020 12:51:59 GMT

To change channel you must go to idle mode first as described here (you don't need to disable):
https://infocenter.nordicsemi.com/topic/sdk_nrf5_v17.0.2/group__nrf__esb.html#gaeac65f947f1be24719a40f5968c9d34b

When you receive a packet you may want to wait some time before going to idle, to ensure that the acknowledge is sent from the receiver to the transmitter.