mqttEventHandler() not called for PUBACK Event when MQTT publish with QOS 1 (LTE/GPS USE)

[billy1418]

I try to use GPS and LTE together in the nRF9160DK.

To do so I turn LTE on, connect to MQTT broker and send a message which got PUBACK handled in mqttEventHandler().

Then I turn GPS ON and then turn OFF (after a delay MAX of KeepAlive with nrf_setsockop(...,...,NRF_SO_GNSS_STOP,...,...)) before publishing a new message on broker.

Issue happen when GPS is OFF (after turned off) and I send a message to the broker with QOS 1.

The message arrived well on the broker but no PUBACK is got from the mqttEventHandler().

When GPS is OFF from the beginning, PUBACK is each time well handled from mqttEventHandler().

[Martin Lesund]

Hi Billy,

Which modem firmware version and NCS version are you using?

Could you check if this works OK on the latest master version on NCS?

Also it would be interesting to know which network and SIM card you are using? (I assume LTE-M technology is used here)

If you could, a modem trace would be really helpful in this case as well.

Best regards,

Martin L.

[billy1418]

Hi Martin,

this issue was fixed by clearing the RAM and now have enough space to receive the PUBACK.