https://devzone.nordicsemi.com/f/nordic-q-a/76239/controlling-nrf-52840-sdk-leds-using-pygatt-ble-terminalHello, I am ble to connect with nRF 52840 using pygatt bluetooth command. sudo gatttool -b E5:3B:A6:E1:58:86 -I. [LE]:connect [LE]:Connection Successful. Even I am able to read some parameters using [LE]: Primary [LE]: Characteristicsen-USTelligent Community 13Thu, 10 Jun 2021 13:26:21 GMThttps://devzone.nordicsemi.com/thread/314724?ContentTypeID=1Thu, 10 Jun 2021 13:26:21 GMT137ad170-7792-4731-bb38-c0d22fbe4515:9aabf1ea-b8de-403c-a7e0-83ed3a37c60dawneil[quote userid="103804" url="~/f/nordic-q-a/76239/controlling-nrf-52840-sdk-leds-using-pygatt-ble-terminal"]Can anyone suggest which nRF program or commands can be used for this[/quote] <p>Have you looked at the SDK examples to seem which sound suitable?</p> <p>eg,&nbsp;<a href="https://infocenter.nordicsemi.com/topic/sdk_nrf5_v17.0.2/ble_sdk_app_blinky.html">https://infocenter.nordicsemi.com/topic/sdk_nrf5_v17.0.2/ble_sdk_app_blinky.html</a>&nbsp;?</p><div style="clear:both;"></div>