Thanks a lot Felix for your advices. I checked every suggestions you’ve made. No success.
Point 1 : service & characteristic : done,
Point 2 : done, with
const uint8_t indicationOn = {0x2,0x0}; pRemoteCharacteristic->getDescriptor(BLEUUID((uint16_t)0x2902))->writeValue((uint8_t*)indicationOn,2,true);
pRemoteCharacteristic->registerForNotify(notifyCallback, false);
Point 3 : done with the latest ESP32/BLE library
Point 4 : tried with something like : uint8_t arrayFV = {0x01,0x00,0x03,0x00,0x27,0xA7}
→ and pRemoteCharacteristic->writeValue(arrayFV, 6);
Did I miss something ?