https://devzone.nordicsemi.com/f/nordic-q-a/13109/getting-error-for-data-transfer-from-peripheral-over-air-bleWhen i am trying to transfer data over air using sd_ble_gatts_hvx() function every time i am getting err_code 12 ( NRF_ERROR_DATA_SIZE ) error. Here i can send data from my Android phone to my Peripheral succesfully, But when i try to send data fromen-USTelligent Community 13Mon, 11 Apr 2016 13:55:35 GMThttps://devzone.nordicsemi.com/thread/49978?ContentTypeID=1Mon, 11 Apr 2016 13:55:35 GMT137ad170-7792-4731-bb38-c0d22fbe4515:dbda2840-3303-41ef-a3bd-bb5f44dd8dbePetter Myhre<p>I recommend you to use SDK 11, not SDK11.0.0-2.alpha. Then you will also use S130 2.0.0, not S130 2.0.0-7.alpha. What example are you using? What have you set the maximum length of the characteristic value to? The max_len field of the ble_gatts_attr_t struct you give to sd_ble_gatts_characteristic_add().</p><div style="clear:both;"></div>