Can the fport value be changed at the gateway? (No)

[bluejedi]

@robertlie

is there a document or link where I can find this information?

You won’t find these ports in any of the current LoRaWAN v1.x specifications.

See the following topic:

LoRaWAN frame port (FPort) numbers

From the LoRaWAN v1.0.3 specification (v1.0.4 and v1.1 will show similar information): 4.3.2 Port field (FPort) If the frame payload field is not empty, the port field MUST be present. If present, an FPort > value of 0 indicates that the FRMPayload contains MAC commands only; see Chapter 4.4 for > a list of valid MAC commands. FPort values 1…223 (0x01…0xDF) are application-specific. > FPort value 224 is dedicated to LoRaWAN Mac layer test protocol However in the “FUOTA Process Summary Techn…