I’m currently experiencing the problem, that confirmed uplinks with more than 17 bytes are not working with TTN when sending with a dr of sf12 or sf11.
The following tests are working fine:
- Sending uplinks with < 17 bytes
- Sending unconfirmed
- Sending with a dr <= sf10
- Sending to another LoRaWAN network server (ChirpStack)
But as soon as I increase the uplink payload to 18 bytes or more, and send them to TTN, I see the following behavior:
The antenna is in the same room. The RSSI of the uplinks are at around -40dBm. Join (OTAA) and uplinks are sending with sf12, cnf = true, adr = true, send trials = 3.
As much as I know, sending uplinks up to 51 bytes shouldn’t be a problem with sf12.
Anyone experiencing/ed the same or something similar?
Thanks in advance for your help.