https://devzone.nordicsemi.com/f/nordic-q-a/15558/how-to-change-to-channel-frequency-on-nrf51822Hello. I test nrf51822 central and peripheral. I want to change radio channel frequency about nrf51822. I test source code as below. nRF51_SDK_10.0.0_dc26b5e\examples\ble_central\ble_app_uart_c\pca10028\s120\arm4 how to change to channel frequencyen-USTelligent Community 13Mon, 08 Aug 2016 08:52:15 GMThttps://devzone.nordicsemi.com/thread/59390?ContentTypeID=1Mon, 08 Aug 2016 08:52:15 GMT137ad170-7792-4731-bb38-c0d22fbe4515:0556ad66-5d23-4e5e-b44b-64e87889a4b4Yoojin.Jang<p>thank you for your comment. I will confirm after modify channel map.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/59389?ContentTypeID=1Fri, 05 Aug 2016 09:09:38 GMT137ad170-7792-4731-bb38-c0d22fbe4515:3cdc2538-9d62-42c4-a096-bc0fb71f9472Hung Bui<p>Hi Yoojin,</p> <p>I assume that you know about the frequency hopping mechanism using a channel map that BLE using on.</p> <p>To change the channel map, you can ues the option api sd_ble_opt_set and set a ble_gap_opt_ch_map_t to enable channels that you want in the channel map.</p> <p>You can have a look <a href="https://infocenter.nordicsemi.com/index.jsp?topic=%2Fcom.nordic.infocenter.s130.api.v2.0.0%2Fstructble__gap__opt__ch__map__t.html">here</a> and <a href="https://devzone.nordicsemi.com/question/77302/how-to-change-channel-map-for-exchanging-data/">here</a></p><div style="clear:both;"></div>