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)

Node-RED

Node-RED Forum

MQTT.FX Thingspeak

General

knolleary 26 June 2020 12:37 13

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

Topic		Replies	Views
MQTT. Thingspeak General	17	2275	26 June 2020
Problems to "read out" mqtt Payload from DHT11 General	5	806	7 April 2021
DHT Sensor Values not populating Gauge General	3	182	20 May 2023
MQTT into function cannot read message General	24	1574	2 August 2021
Python node passing data to mqtt/debug General	14	2282	4 February 2020

Copyright OpenJS Foundation and Node-RED contributors. All rights reserved. The OpenJS Foundation has registered trademarks and uses trademarks. For a list of trademarks of the OpenJS Foundation, please see our Trademark Policy and Trademark List. Trademarks and logos not indicated on the list of OpenJS Foundation trademarks are trademarks™ or registered® trademarks of their respective holders. Use of them does not imply any affiliation with or endorsement by them.

MQTT.FX Thingspeak

Related topics