Thanks Mike,
I know about the 3 default channels, they are 868.1, 868.3, 868.5 MHz, but I can’t use this to communicate. I can only communicate with the 868.1 MHz channel and not all of time (the gateway don’t received all my message).
You talk about 5 channels, but on the web UI, I can configure only the field for “Additional Channels” (I set it on 869,5 MHz). I don’t know how I can determine the frequency for each of the 5 channels.
I’m using the TTN API, it is perhaps my problem, but the TTN community told me : “Our API works on all LoRa network”. So I didn’t know where is my problem.
A.F