I try to do this project, but with DHT sensors, and i've got this error. Any help? https://flows.nodered.org/flow/00e8c4223c3a4e6539b75a7541abfef2 [Function] [2020-06-23-193626_800x480_scrot] I use MQTT.fx broker (With thingspeak) and all settings (pub/sub) in the broker are ok.Now i want to us…

It looks like you are passing the message from the DHT node to the MQTT Function. Can you show the Debug output for the message coming out of the DHT node? The error is because either msg.payload.object or msg.payload.ambient doesn't exist. If you can share what the message coming out of the DHT no…

msg.payload.object andmsg.payload.ambient exist in the MQTT Function node. I pass the message from the DHT node through MQTT Function node to the mqtt out node. This pic shows dht debug [2020-06-23-221212_800x480_scrot] This pic shows the mqtt debug [2020-06-23-221218_800x480_scrot]

In the first post, your screenshot showed an error of Cannot read property toString of undefined coming from the MQTT Function node that would have been caused by either msg.payload.object or msg.payload.ambient not existing. In your more recent post, you've shared a completely different error - …

Sorry for the error [2020-06-23-223323_800x480_scrot]

Your msg.payload seems to be just "26.00", so it does not have msg.payload.object or msg.payload.ambient. (Sorry if I misunderstood the discussion on a quick read).

msg.payload.object and msg.payload.ambient exist in the MQTT Function node.

No they don't exist. The debug shows your message doesn't contain those properties.

In the first pic i show the Function node content, may be they are not write properly ?

You might have written them in a function node but they don't exist in the message. Look at your debug output. There NO msg.payload.object or msg.payload.ambient in the msg That's why you get an error in the function (as Nick said)

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knolleary 26 June 2020 12:37 13

Closing this thread because it has be continued here: MQTT. Thingspeak

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