jgromes/RadioLib

LoRaWAN, uplink fails when no downlink on previous uplink

Closed this issue · 6 comments

MortenGuldager commented

LoRaWAN Uplink fail if previous uplink didn't respond with a downlink.

I have an ESP32C3 wired to a RFM95 module. Keys are installed on a chirpstack server and communication initially flows fine, uplinks are seen on server and downlinks are processed too. I can see ADR is doing its thing.
Then when ADR is completed and no more downlinks are sent, the following uplinks fail with -1108 (RADIOLIB_ERR_UPLINK_UNAVAILABLE)

I can delay this lock-up by keep queuing downlink messages.

I notice this is only a problem if I dont enter deep-sleep between cycles.

Mainloop is simple (the increasing fPort is just to make it easier to track on the LNS):

void loop()
{
    static int fport = 50;
    
    String str = "ABCDEF";
    int16_t rl_err;

    rl_err = node.uplink(str, fport);

    Serial.print(fport);
    Serial.print(" : tx res: ");
    Serial.println(rl_err);

    node.downlink();

    delay(30000);
    fport++;
}

the full example code is attached if anybody want to try it out
main.txt

My environment is: ESP32, Arduino framework (Platform.io), RFM95, jumperwires, chirpstack, EU868, RadioLib:jgromes/RadioLib@^6.6.0

MortenGuldager commented

I have just reproduced the error on a different set of hardware:

  • different RFM95 module
  • an esp32 wroom dev kit

Code is the same except for new pin mappings

HeadBoffin commented

I'll replicate your setup to reproduce, will be easier to comment then.

MortenGuldager commented

New observation:
I upgraded from 6.6.0 to "master" and after making minor changes to get my application to build, it now seems to keep going downlinks or not.
My platformio.ini

lib_deps = 
    ; jgromes/RadioLib@^6.6.0
    https://github.com/jgromes/RadioLib.git#master
StevenCellist commented

As a new RadioLib version is upon us (as in: a few hours, likely), I was honestly waiting for the release and would then ask you to upgrade ;)
Glad to hear that upstream resolves this issue. Those are the easiest issues to fix!

@HeadBoffin I wouldn't bother testing it.

  • 👍2
StevenCellist commented

Resolved with RadioLib 7.0 being released.

MortenGuldager commented

And I can confirm that it indeed also works with an official 7.0.0.

  • ❤️1