https://devzone.nordicsemi.com/f/nordic-q-a/58561/gatt-connection-writing-via-nrf_connect-app-only-receiving-a-single-byteHi, I have a modified template of the ble_app_template example from sdk 15 NRF58240-dk pca 10056 s140. I have written a custom function as per this tutorial : https://github.com/bjornspockeli/custom_ble_service_example I am using the onwrite functionen-USTelligent Community 13Tue, 03 Mar 2020 13:49:10 GMThttps://devzone.nordicsemi.com/thread/237784?ContentTypeID=1Tue, 03 Mar 2020 13:49:10 GMT137ad170-7792-4731-bb38-c0d22fbe4515:cc5863a1-c876-408c-9b6a-829e14feef88Thomas<p>The data was not wrong it was just always empty. I recreated it again in another example and it now works. I am not specifically sure why it did not. Could be the data I was passing into the function was not the correct size. I changed it to a uint32_t and am now passing in integer values.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/237721?ContentTypeID=1Tue, 03 Mar 2020 12:28:05 GMT137ad170-7792-4731-bb38-c0d22fbe4515:2a0f262e-4b69-48d3-a3ed-259215405b08Mttrinh<p>Hi,</p> [quote user=""]But when I change my variable from a uint8 to anything bigger it does not read the data.[/quote] <p>Can you give more details on what you mean by &quot;does not read data&quot;? Is the data wrong? No data? Any error codes?&nbsp;</p><div style="clear:both;"></div>