https://devzone.nordicsemi.com/f/nordic-q-a/45618/write-without-responseIs there a way to configure the nRF51822 to support writewithoutResponse? I&#39;m using the Adafruit Feather 32u4 with the nRF51822 ble chip. My iOS app works fine with the older Adafruit BLE4.0 nRF8001, but does not work with the Feather. The problem seemsen-USTelligent Community 13Wed, 03 Apr 2019 12:23:43 GMThttps://devzone.nordicsemi.com/thread/179990?ContentTypeID=1Wed, 03 Apr 2019 12:23:43 GMT137ad170-7792-4731-bb38-c0d22fbe4515:64a046a6-7400-4dd2-86d6-aa3e71b22d50run_ar<p>Not familiar with the adafruit libreries. But seems there is an option for writewithoutResponse here at least: <a href="https://learn.adafruit.com/adafruit-feather-m0-bluefruit-le/ble-gatt">https://learn.adafruit.com/adafruit-feather-m0-bluefruit-le/ble-gatt</a></p> <p>See at+gattaddchar</p><div style="clear:both;"></div>