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Packet Forwarder uplink problem

Test environment:

Gateway:
Platform:Raspberry pi + SX1301 with 1257.
SW:gps_pkt_fwd

IF0~IF7:
Multi-Datarate
125K


Node:
SX1276 (demo kit)
Frequency:868.5Mhz,codeing rate:4/5, SF7, Payload size:16 Bytes

Q:
TX (node) sent one packet each 200ms to Lora gateway (SX1301) but it looks like lost some packets on RX side.
How to solve this problem?

For example:
TX (Node sent to Gateway:SF7,4/5,125K):
Time Payload
0ms 00 11 22 33 44 55 66 77 88 99 AA BB CC DD EE FF <-packet 1
200ms 01 11 22 33 44 55 66 77 88 99 AA BB CC DD EE FF
400ms 02 11 22 33 44 55 66 77 88 99 AA BB CC DD EE FF
600ms 03 11 22 33 44 55 66 77 88 99 AA BB CC DD EE FF
800ms 04 11 22 33 44 55 66 77 88 99 AA BB CC DD EE FF
1000ms 05 11 22 33 44 55 66 77 88 99 AA BB CC DD EE FF
1200ms 06 11 22 33 44 55 66 77 88 99 AA BB CC DD EE FF
1400ms 07 11 22 33 44 55 66 77 88 99 AA BB CC DD EE FF
1600ms 08 11 22 33 44 55 66 77 88 99 AA BB CC DD EE FF
1800ms 09 11 22 33 44 55 66 77 88 99 AA BB CC DD EE FF <-packet 10


RX (Gateway receive):
I can see log from raspberry pi console mode each 30 seconds (default config setting)

Payload
00 11 22 33 44 55 66 77 88 99 AA BB CC DD EE FF <-packet 1
05 11 22 33 44 55 66 77 88 99 AA BB CC DD EE FF <-packet 6
06 11 22 33 44 55 66 77 88 99 AA BB CC DD EE FF <-packet 7
09 11 22 33 44 55 66 77 88 99 AA BB CC DD EE FF <-packet 10

Thanks!
Avatar
Hello,

I would first make sure that there is no inconsistency in the channel plan, between the gateway and the device.
Then, I would reduce the pace to one packet every 5 seconds, and see if there is any difference.
Another test, make sure that the Public vs. Private network setting is consistent between the packet forwarder and the device.
Also, please confirm the RSSI and SNR on the packets you have successfully received, that will give a clue.

Best regards