I've played with LoRaWAN and I think that it has one major problem. Limited ack frames. In such case you can not be 100% sure about your data. Symphony link cla

I've played with LoRaWAN and I think that it has one major problem. Limited ack frames. In such case you can not be 100% sure about your data. Symphony link claims that they have every frame acked, and firmware uploads, but I didn't test it. LoRaWAN could work with custom channels (private freq), not limited to 1% of air time.