I have two nodes and a things gateway.
Some days ago I got this issue :
- first node try to join netwok, gateway get packets but do not send any koin accept
- second nodes uses ABP, it sends some frame, but it never gets hacks
In both cases, I can send join and uplink packets received on gateway side.
Only downlink is KO.
GW logs :
LORA: Accepted packet
MQTT: Sending UPLINK OK
LORA: Accepted packet
MQTT: Sending UPLINK OK
MON: SYS Stack size: 2837
MON: heap usage: 262KB (263KB), free: 76KB
LORA: Accepted packet
MQTT: Sending UPLINK OK
LORA: Accepted packet
MQTT: Sending UPLINK OK
MQTT: Sending status packet
MQTT: Sending status succeeded: 29
LORA: Accepted packet
And corresponding console logs!
My gateway is very near from my nodes (some meters), but I also tried to move it farther.
Some time ago I experienced this problem on my vlan because of incoming UDP traffic. But now I’ve checked UDP filtering, I tested with gateway connected to my phone configured as access point : GW could not send any downlink!
And now, after some testing : downlink is back.
How can we explain this behavior? How can we check TTN server are ok?