Hi guys, I´ve RESOLVED my problem.
Debuging the node side and the server side, JOIN REQ/RESP loop, I realize the NS and the JS, were working fine.
But the downlink wasn´t received by the node. So, all the process started again and again. Sometimes, at begining (first packet) I got a succesful JOIN in the node at specific band, but then the next packets did not received the ACK downlinks, and the JOIN process started again.
That conducted us to focus in the subbands the node and the gateway were working(we have two: a Kerlink IfemtoCell and a Raspberry RAK-831). Finally we noted, we had a bad configuration in the loraserver configuration file. It was working in 868, and we were working in the AU915. (Begginer error)
Changing this configuration, the node join quickly and “Join Req” packet are not sent anymore.
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