Solved

Generate N equally spaced intervals between -L and L
Given N and L, return a list of numbers (in ascending order) that divides the interval [-L L] into N equal-length segments. F...

3 years ago

Answered
I want to display negative temperature on channel view
Here are a few ways to get negative numbers into ThingSpeak or to plot them in MATLAB. https://api.thingspeak.com/update?api_ke...

3 years ago | 0

Solved

Getting the indices from a matrix
Inspired by Problem 645. Getting the indices from a matrix. Given a matrix A (or a vector), return the indices (always in row...

3 years ago

Answered
Is thingspeak free version account expire after one year
See the licensing FAQ. Free ThingSpeak licenses will renew yearly in the month you created the license assuming you meet the log...

3 years ago | 0

Solved

Matlab Basics - Rounding III
Write a script to round a large number to the nearest 10,000 e.g. x = 12,358,466,243 --> y = 12,358,470,000

3 years ago

Solved

Matlab Basics - Rounding II
Write a script to round a variable x to 3 decimal places: e.g. x = 2.3456 --> y = 2.346

3 years ago

Solved

Check that number is whole number
Check that number is whole number Say x=15, then answer is 1. x=15.2 , then answer is 0. http://en.wikipedia.org/wiki/Whole_numb...

3 years ago

Discussion

Community contests to help you improve your MATLAB coding skills
Hopefully you are aware that MATLAB is built into ThingSpeak. Right now, MathWorks is hosting two contentsthat can help you lea...

3 years ago | 0

Solved

MATLAB Basic: rounding IV
Do rounding towards plus infinity. Example: -8.8, answer -8 +8.1 answer 9 +8.50 answer 9

3 years ago

Solved

MATLAB Basic: rounding III
Do rounding towards minus infinity. Example: -8.8, answer -9 +8.1 answer 8 +8.50 answer 8

3 years ago

Solved

MATLAB Basic: rounding II
Do rounding nearest integer. Example: -8.8, answer -9 +8.1 answer 8 +8.50 answer 9

3 years ago

Solved

MATLAB Basic: rounding
Do rounding near to zero Example: -8.8, answer -8 +8.1 answer 8

3 years ago

Answered
App designer table handling
Thanks for showing the result Karol. Im taking your solution and adding it to the answers to help others find it. Solved by ...

3 years ago | 0

Answered
Can't send data to Thingspeak from Microbit DFRobot kit
Are you able to update the channel using the GET command in your browser address bar? Click on your channel view and use the A...

3 years ago | 0

Answered
Unable to write data by bulk update *csv method [ESP8266, Arduino framework]
I havent tested this recently, but I found it in an old folder and I expect that it works. I had to escape some values. Please ...

3 years ago | 0

Answered
Unable to write data by bulk update *csv method [ESP8266, Arduino framework]
The arduino client should take care of url encoding your data. I would use the raw text in the value of char csv_feed Perhap...

3 years ago | 0

Answered
How can I upload and plot temperature values that are both above zero (e.g., ambient) and below zero (e.g., in a freezer)?
I think the library answer seems best. Here is an example using the dallas one wire (that has some other dependancies built in ...

3 years ago | 0

Answered
Will generating an alert API key reset the USER API key?
The alert API key and user API key are seperate. Genenrating an alert API key wil not change your user API key.

3 years ago | 0

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How to check DataPlugin in MATLAB
This pagedesribes how you can read MATLAB files into labview witha dataplugin and this answer describes some ways to import l...

3 years ago | 0

Answered
HOW TO CLEAN NULL FROM MY GET QUERY
We reccomend using multiple channels to record your data in the case of multiple devices or sensors with different frequencies. ...

3 years ago | 0

Answered
ThingSpeak Channel stopped receiving data since April 13th 2022
We strongly reccomend using the thingSpeak library for arduino and esp if possible. I dont see the problem directly. I would r...

3 years ago | 0

Answered
Why arduino send data to thingspeak only once?
Your device will continue to send data once disconnected from the USB port, as long as it is powered and within the WiFi range. ...

3 years ago | 0

Answered
Thingspeak REST API READ results in data from wrong timezone
Check out the timezone and offset parameters in the read data endpoint.

3 years ago | 2

Discussion

Secure ThingSpeak communications and security certificate
The ThingSpeak certificate was updated recently. If you are using secure communication for your devices, you may need to update...

3 years ago | 0

Answered
MQTT via esp8266 suddenly stopped connecting giving mqttClient.state() = -2 error!?
ThingSpeak recently updated the security certificate. Can you try reprogamming with the new cert? The ESP8266 MQTT example co...

3 years ago | 0

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Answered
In thingspeak , how can I visualize two or more channels on one page so I can view different fields from different nodes at a time ?
In the tabs on the top of the ThingSpeak site, Click on Apps > MATLAB Visualizations then click the green 'New' button, and you ...

3 years ago | 1

Answered
The graph couldn't be seen on the chart although the code ha been run correctly
We strongly reccomend using the ThingSpeak library for arduino, it takes care of a lot of code issues for you. Troubleshooting ...

3 years ago | 0

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Answered
Contents of Channel Status Updates disappears
I thnk the idea was to remove noise if you had a system that reports everytime (like the system on the channel in the code I sha...

3 years ago | 0

Answered
Contents of Channel Status Updates disappears
Is this true after refreshing the page? The channel status updates widget shows onlu the last 24 hours of status. You could c...

3 years ago | 0

Answered
Need to increase more fields in Free ThingSpeak account?
You can use the status and location field, use multiple channels per device, or pack more inforamtion into a single field (they ...

3 years ago | 1