MQTT BASIC Last Will & Testament

Ewon Support Ewon Flexy
, , , ,
#1

Hello,

I am getting an ‘Invalid Parameter’ for any ‘Will’ parameters with the MQTT SETPARAM function.

I either get a (5) - invalid parameter or (28) - operation failed

The parameters in question are WillTopic, WillPayload, and WillRetain

Thanks!!

#2

Make sure that you are on firmware 14.5PR as support for LWT was just added.

#4

Well that was silly. You are correct. My mistake :slight_smile:

#5

I do still get the ‘Invalid Parameter (5)’ on the ‘WillRetain’ parameter though, after firmware upgrade.
Any insight how to get this to work with a Mosquitto broker? I am receiving “No will message specified” on the broker when the Flexy connects.

Relevant Code:

TopicToWill$ = EwonName$ + “/” + SerNum$ + “/sts”
//MQTT “SETPARAM”, “WillRetain”, 1
MQTT “SETPARAM”, “WillTopic”, TopicToWill$
MQTT “SETPARAM”, “WillPayload”, “Not Connected”

Thanks

#6

I have not tested this yet, but according to the release notes, only WillTopic and WillPayload parameters were added:

ADDED [FLEXY] MQTT: Last will & testament parameters added (WILLTOPIC, WILLPAYLOAD parameters added)

I will have to check with the developers on this. Have you posted this question on the Ewon Developer Forum?

#7

No, but I can do that.

Also, for any future lurkers, I had to make “WillRetain” have a string value of “1”, not integer of 1.

Thanks

#8

Thank you for sharing this!

I’m going to open a case for this in our ticketing system as well to get some more info from the devs, so you will get an email stating that a case has been opened. I’ll let you know when I hear back.