https://devzone.nordicsemi.com/f/nordic-q-a/9000/send-write-characteristic-command-data-to-all-connected-peripheralHello,I use s120 and I wnat to send data(write charactheristics value) to all connected peripheral when I receive a character from uart(in uart event handler)?(I use ble_app_multilink_central_s120) Can I do this using sd_ble_gattc_write() ?If yest,whaten-USTelligent Community 13Wed, 02 Sep 2015 06:28:58 GMThttps://devzone.nordicsemi.com/thread/33137?ContentTypeID=1Wed, 02 Sep 2015 06:28:58 GMT137ad170-7792-4731-bb38-c0d22fbe4515:9b025190-74ce-4ca1-b0ae-b5103ca4d44eJohn<p>Thanks a lot,Hung Bui!</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/33136?ContentTypeID=1Tue, 01 Sep 2015 10:38:02 GMT137ad170-7792-4731-bb38-c0d22fbe4515:30d2e096-7c29-44ce-96c8-be8f055c5c53Hung Bui<p>Hi John,</p> <p>As you can find in the description of sd_ble_gattc_write() description, there is a conn_handle parameter to identify the connection (peripheral). So if you have to send write command to several peripherals you would need to keep track of the active connection handles and call sd_ble_gattc_write() for each peripheral.</p><div style="clear:both;"></div>