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Christopher Stapels


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MathWorks

115 total contributions since 2017

ThingSpeak Documentation Writer
and LCH enthusiast

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Answered
csv upload fails "...contains invalid location fields"
There were two recent changes to csv upload. Position validation: the Latitude must be from -90 to +90, and Longitude from -...

3 days ago | 0

| accepted

Answered
Can't import csv file into thingspeak.
The enforcement of time stamps seems to have become more strict. I will look into what changed. I was able to upload this file...

4 days ago | 0

Answered
Insert the fields into a web site
If you just want the field value from a channel field, you can use the Read Data API call to get the data and embed it in your s...

7 days ago | 0

Answered
Thingspeak, Delete channel with HTTP DELETE, webwrite
Make the api_key a querry string parameter. url = ['https://api.thingspeak.com/channels/' channelID '.json?api_key=<userAPIKey>...

16 days ago | 0

| accepted

Answered
Sending data from TTN
What TTN server are you using? I was having trouble with the meshed server in Australia.

18 days ago | 0

Answered
MQTT Connection keep alive time value
Ive used 15 second sucessfully for a log time now. Its the default for the arduino mqtt pubsub library. I havent detected any ...

21 days ago | 0

| accepted

Answered
Passing data from ThingHTTP to IFTTT Webhook send email
I reccomend you use the new alerts feature in ThingSpeak. You wont need IFTTT at all! you can pass data in the subject and the...

23 days ago | 0

| accepted

Answered
Uploaded data is not appearing in Imported data function
I've found it easier to do a POST for update requests, since there is more control. I would recomend using the ThingSpeak Libr...

28 days ago | 0

Answered
Uploaded data is not appearing in Imported data function
Are you using the data export on the web site, or an HTTP call? If so, can you show the format of your HTTP call? ( you dont n...

29 days ago | 0

| accepted

Answered
How to simultaneously publish the data to multi fields of thingspeak channel from a raspberry pi via code generation deployment using MATLAB code(not via Simulink) .
Have a look at the Write Data page. You can append &fieldX=value to add additional fields to an update.

1 month ago | 0

Answered
Sending data from another cloud provider to ThingSpeak
ThingSpeak will most likely be able to accept your data. I would suggest you start with the Get Started tutorial. Its a really ...

1 month ago | 0

Answered
IOT4SH01DS problem Thingspeak-automatic parameter reset
While we apprciate the app, MathWorks does not make or support the ThingViewer app, or the IOT4SH01DS device. I would suggest...

1 month ago | 0

Answered
Error 401 Arduino ESP8266
Are you able to update your channel from a web browser? Use the format https://api.thingspeak.com/update?api_key=xxxxxxxxxxxx...

1 month ago | 0

Answered
Unable to post to Thingspeak channel via TCP
No problem. If you look at the code in the doc examples, the way I generally do it is to check the connection for each loop, bu...

1 month ago | 0

Answered
Creating email alert using Matlab, but getting error
change avg_temperature to aveTemp.

1 month ago | 0

Answered
Unrecognised function or variable 'avg_temperature' on Matlab
Change avg_temperature to aveTemp.

1 month ago | 0

Answered
How to use new feature of sending alerts on thingspeak?
There is a terrific overview at the Alerts API doc page, and you can see all the links to the specific pages for the functions a...

1 month ago | 0

Channel


sko
temperature monitor

1 month ago

Solved


Generate a vector like 1,2,2,3,3,3,4,4,4,4
Generate a vector like 1,2,2,3,3,3,4,4,4,4 So if n = 3, then return [1 2 2 3 3 3] And if n = 5, then return [1 2 2...

1 month ago

Answered
Why feeds on your request API only contains few fields?
Have a look at the Read Data doc page. You can use the timezone parameter to control the time format for the response. Are a...

1 month ago | 0

Answered
How does IFTTT works in conjunction with your email notification?
ThingSpeak now has its own alerts service! You wont need IFTTT to do the integration. Have a look at Vinods response in this p...

1 month ago | 0

Answered
Unable to write data to ThingSpeak , HTTP error 400
Can you try to update your channel from a web browser? Use the format https://api.thingspeak.com/update?api_key=xxxxxxxxxxxxxx...

2 months ago | 0

Answered
How to edit ThingSpeak data gathering script
When you are logged in to ThingSpeak, click on apps, and choose MATLAB analysis. The script should appera in the list of MATLAB...

2 months ago | 0

Answered
How to use React to send threshold and email to your thingspeak?
There is a demonstration in the documentation for using a time control to trigger an email via the IFTTT service. There is a si...

2 months ago | 0

Answered
How to use date range for your timezone in thingspeak?
You can use the timezone or offset parameters. They are documented in the Read Data documentation page. Be sure to change the ...

2 months ago | 0

Answered
Sampling rate of accelerometer data
It may be difficult to update accelerometer data to ThingSpeak if your sampling rate is very high. If the data are collected in ...

2 months ago | 0

| accepted

Answered
mqtt via ESP8266 connected but not subscribing
My monitor channel seems is consistently publishing messages with none lost. I have two subscriptions. I would say perhaps your...

2 months ago | 0

Answered
Thingspeak - Public Channel - Viewer Counter
Thank you for this request. I agree that this would be interesting information. I will add it to our list of enhancement request...

3 months ago | 0

Answered
Display daily values at a certain time
Is the field you want to plot the one called "brennerlaufzeit"?

3 months ago | 0

Answered
Geographic plot: plotting a third variable other than lat and long in geoscatter
Here is a ThingSpeak example showing how to use geoscatter to plot some additional variables. You can also use the same code in...

3 months ago | 0

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