@maxdorable do you see any message received from the gateway? Keep in mind that NRF24 use quite some peak power during transmission so not all boards can supply enough power and a capacitor is needed on the VCC and GND near the radio. Quite some people got it sorted out (me included=ì) by using one of those adapters with voltage regulator from 5v to 3.3V + capacitor (if not included already in the adapter)