Hi there,
we recently observed the following situation.
We are sending a Confirmed Uplink starting at SF7. The gateway correctly tries to respond to the same channel/freq and the device fails to receive the ACK (that’s actually done on purpose). Then the device correctly moves to the next SF. Everything works as expected until we reach SF9 when the LoRa Server starts replying in Window 2 without even trying RxWin1 (notice the freq is 869.525). Even when we get to SF10+ zone, the server keeps responding with win2 settings
JSON up: {"rxpk":[{"tmst":1198057243,"chan":0,"freq":868.100000,"datr":"SF7BW125",
JSON down: {"txpk":{"imme":false,"tmst":1199057243,"freq":868.1,"datr":"SF7BW125",
JSON up: {"rxpk":[{"tmst":1206002979,"chan":1,"freq":868.300000,"datr":"SF7BW125",
JSON down: {"txpk":{"imme":false,"tmst":1207002979,"freq":868.3,"datr":"SF7BW125",
JSON up: {"rxpk":[{"tmst":1214025604,"chan":2,"freq":868.500000,"datr":"SF8BW125",
JSON down: {"txpk":{"imme":false,"tmst":1215025604,"freq":868.5,"datr":"SF8BW125",
JSON up: {"rxpk":[{"tmst":1228258332,"chan":3,"freq":867.100000,"datr":"SF8BW125",
JSON down: {"txpk":{"imme":false,"tmst":1229258332,"freq":867.1,"datr":"SF8BW125",
JSON up: {"rxpk":[{"tmst":1242222804,"chan":4,"freq":867.300000,"datr":"SF9BW125",
JSON down: {"txpk":{"imme":false,"tmst":1244222804,"freq":869.525,"datr":"SF9BW125",
JSON up: {"rxpk":[{"tmst":1270708436,"chan":5,"freq":867.500000,"datr":"SF9BW125",
JSON down: {"txpk":{"imme":false,"tmst":1272708436,"freq":869.525,"datr":"SF9BW125"
JSON up: {"rxpk":[{"tmst":1299296916,"chan":6,"freq":867.700000,"datr":"SF10BW125",
JSON down: {"txpk":{"imme":false,"tmst":1301296916,"freq":869.525,"datr":"SF9BW125"
JSON up: {"rxpk":[{"tmst":1349707820,"chan":7,"freq":867.900000,"datr":"SF10BW125",
JSON down: {"txpk":{"imme":false,"tmst":1351707820,"freq":869.525,"datr":"SF9BW125",
We also tried different scenarios such as starting from SF8 or SF10. The moment our SF is equal or larger than SF9, the server is responding with Window 2 settings.
Does anyone see an issue here or is this a TTN feature we have been missing?