Join timeout

[cjhdev]

Join timeout

[cjhdev]

Hi

Single channel gateways are a problem for many reasons. I am surprised you are able to get a join request to the server.

Setting LDL_System_eps() is usually enough to ensure you will hit the RX window. LDL_System_advance() simply opens the window n ticks earlier than it otherwise would.

Events LDL_MAC_RX1_SLOT and LDL_MAC_RX2_SLOT will indicate a missed window if rx_slot.error > rx_slot.margin.

Other potential problems:

1. TTN might not be delivering the downlink at the right time
2. If you are using SF12, it doesn't work reliably unless you have a temperature compensated oscillator (This is why LDL_DEFAULT_RATE defaults to 1)
3. The radios might be too close together (I'm usually a couple of metres away from my gateway)

EDIT:

And I assume you are using the latest code :-)

[cjhdev]

I'm closing this issue because I've not been able to reproduce the issue.

The error compensation method has been updated recently to make it easier to apply "fudge factor" to try to get around window timing problems. I've written a section in porting.md about it.