Test LoRaWAN LinkCheck & DeviceTime

[HeadBoffin]

Discussed in #967

^{Originally posted by michapr February 13, 2024}
Hi,

using the LoRaWAN_End_Device_Reference.ino I cannot get valid results for the LinkCheck and DeviceTime values.
Connection itself is ok, I can see the transferred data in TTN console.

code (from examples file):

    uint8_t margin = 0;
    uint8_t gwCnt = 0;
    if(node.getMacLinkCheckAns(&margin, &gwCnt)) {
      Serial.print(F("[LoRaWAN] LinkCheck margin:\t"));
      Serial.println(margin);
      Serial.print(F("[LoRaWAN] LinkCheck count:\t"));
      Serial.println(gwCnt);
    }

    uint32_t networkTime = 0;
    uint8_t fracSecond = 0;
    if(node.getMacDeviceTimeAns(&networkTime, &fracSecond, true)) {
      Serial.print(F("[LoRaWAN] DeviceTime Unix:\t"));
      Serial.println(networkTime);
      Serial.print(F("[LoRaWAN] LinkCheck second:\t1/"));
      Serial.println(fracSecond);
    }

Result:

LoRaWAN] LinkCheck margin:	0
[LoRaWAN] LinkCheck count:	0
[LoRaWAN] DeviceTime Unix:	0
[LoRaWAN] LinkCheck second:	1/0

What maybe wrong here?

Thanks!

EDIT:
another interesting detail:
If add the request
node.sendMacCommandReq(RADIOLIB_LORAWAN_MAC_LINK_CHECK);
I will get an answer for
node.getMacDeviceTimeAns(&networkTime, &fracSecond, true)
(with same results as above...)

[HeadBoffin]

Will test and respond by Thursday pm GMT latest.

[HeadBoffin]

It isn't working as expected, code has been identified, unexpected meeting has been scheduled so this is likely to be fixed early next week.