Krish Raj in Discussions
上次活动时间: 2024-5-24

Hi Helpdesk, I urgently seek assistance with an issue that has persisted for a week. I am using Node-RED to interface my gateway and vibration sensor. The sensor sends 960 packets of X, Y, and Z data every 5 minutes. I retrieve and send this data through my Thingspeak42 node to my Thingspeak channel. I am subscribed to the Thingspeak Student paid plan (see attached "12.png"). Despite this, Thingspeak is inconsistently snipping my data. For example, my X-field sometimes receives only 78 out of 960 points, and similar inconsistencies occur with the Y and Z fields. Attached is "vibration data node red.png," showing an attempt to send just 120 packets to my Thingspeak channel. However, only 93 data points are received. Also attached is a JSON snapshot of field 2 - X_values, showing only 93 points ("JSON Field 2 data.png"). This is disappointing given that I am paying for the student plan, which should support 33 million points/year per unit (~90,000/day per unit). I urgently require an explanation and resolution for this issue. Please provide immediate assistance. Kind regards, Krish Troubleshooting Data Loss in High-Frequency IoT Sensor Data with Node-RED and ThingSpeak Each field can contain up to 255 characters. See the the Configure accounts and channels page for more information. In order to fit all your data, you will need to split it into multiple fields, or multiple feed entries. node red thingspeak channel not recordi
Marco in Discussions
上次活动时间: 2024-5-13

I isolated a var that I'm interested in, and I want to connect Node-RED to thingspeak to show the values on the graph. The problem is the node "mqttout": I connected it to the server mqtt3.thingspeak.com and the port 1883, and with the device with right username and password. It shows "connected", but the graph is still the same, I can not upload the varabiles. mqtt connection problem Have you created an MQTT device in ThingSpeak and given permissions for MQTT to write to the channel? See the instructions in the MQTT Basics. Yes I have it, I don't know why it doesn't work I reccomend troubleshooting using the desktop client. You can see instructions in the help link I send above. Also , a common casue of not seing data on the field plots is sending non numeric data by accident. Make sure to export the recent data in your channel to be sure its not there but in an unexpected format. mqtt connection node-red upload
Pierre de Wet in MATLAB Answers
上次活动时间: 2023-7-11

I'm currently busy with a project in which I use a wearble device that uses an accelerometer to track a worker's motions. I'm using Node Red to develop the system and from there I send the data to a ThingSpeak channel. There is however latency issues between these two platforms. It takes a few seconds for measurements to pop up on the ThingSpeak channel after the captured data has been displayed on Node Red. Additionally, only a quater of the data displayed on Node Red can be accounted for on ThingSpeak. Any adivce would be greatly appreciated.

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