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Christopher Stapels


MathWorks

94 total contributions since 2017

ThingSpeak Documentation Writer
and LCH enthusiast

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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 ...

environ 12 heures 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 ...

environ 12 heures 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...

3 jours 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...

6 jours ago | 0

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

10 jours 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...

15 jours ago | 0

Answered
Can't export all channel's feed from Thinsgspeak - HTTP time out error 504
This is a known problem and we are developing a fix. In the meantime, you can use the read data API call to read up to 8000 poi...

20 jours ago | 1

Answered
how to write to a ThingSpeak field from an iphone
If I understand what you would like to do, the REST API is exactly what you need. Click the API keys tab on your channel view...

21 jours ago | 0

| accepted

Answered
How do I get Field_ID in Thingspeak?
Field ID's are numeric 1-8. The label for the fields can be seen if you read https://api.thingspeak.com/channels/<channel_id>...

22 jours ago | 0

| accepted

Answered
ESP8266 Wifi error code -301
For simplicity, perhaps you could try to write single field example in the thingSpeak library under esp8266. Im a big fan of th...

23 jours ago | 0

Answered
Thingspeak "data export" button not working
We are able to reproduce this issue and we are working on a fix. In the meantime, if you need access to the data from this chan...

24 jours ago | 0

Answered
How to add a timestamp to body?
You should also be able to call the THingHTTP with React and the replacement key will work. So have the device write data (for ...

24 jours ago | 0

Answered
Reading from Thingspeak: Daily averages are easy. How do I get a monthly average?
I also like the look of your result. But I am afraid that it makes a bunch of API requests to the server in a big burst. Its f...

24 jours ago | 0

Answered
mqtt via ESP8266 connected but not subscribing
You can have up to three simultaneous MQTT connections with a free license. Thanks for posting that you got it working again.

25 jours ago | 1

Answered
mqtt via ESP8266 connected but not subscribing
The mqtt server should reset the count when your devces disconnect, though there may be a short delay. Are you still having thi...

25 jours ago | 1

| accepted

Answered
ThingSpeak Communications Library - how to read multiple fields with one fetch
Yes its on the enhancement request list, but unfortunately has been for some time. I hope it isnt too much longer.

25 jours ago | 0

| accepted

Answered
Thingspeak "data export" button not working
If your channel is public, can you share the channel number so someone else can try it? Are you sure there is data in the chann...

25 jours ago | 0

Answered
Getting -310 error on simple MathWorks ThingSpeak get temperature example
I got a -301 error when I didnt have the Ethernet cable plugged in, but now it is working fine on an arduino Uno with ethernet S...

27 jours ago | 0

| accepted

Answered
Getting -310 error on simple MathWorks ThingSpeak get temperature example
What hardware you are using? We will try to reproduce the error. EDIT I am sttempting to verify the error with an arduino Uno w...

27 jours ago | 0

Answered
Reading from Thingspeak: Daily averages are easy. How do I get a monthly average?
There are built in template codes to help you develop MATLAB code. If you go to the MATLAB analysis or MATLAB Visualizations ap...

27 jours ago | 0

| accepted

Answered
Channel ID doesn't matter during upload data
You are correct. It is better for security reasons to provide both the API key and channel ID. Additionally it makes tracking yo...

29 jours ago | 0

| accepted

Answered
How to add a timestamp to body?
Yes this is the expected behavior. As described above, you need to call the thingHTTP with TimeControl or React to use the date...

29 jours ago | 0

Answered
How to add a timestamp to body?
What time would you want to see in the response? I would have guessed you want to see the time it was called. It might help fo...

29 jours ago | 0

Answered
How to test for thing speak plugin using user input's?
Can you rephrase your question? It does not seem to be clear what you are asking.

30 jours ago | 0

Answered
How to add a timestamp to body?
Can you take screen shots of the thingHTTP and TimeControl settings? Make sure you blur out the api keys if you want to keep th...

30 jours ago | 0

Answered
How to add a timestamp to body?
You need to trigger the request with a TimeControl or React. I just tested it with a TimeControl, I'm sure I've tested with a R...

30 jours ago | 0

Answered
how to export data in time range using thingspeak?
You can see the documentation for the read data API call. There is a dateRange parameter you can use. Just be extra careful a...

environ un mois ago | 0

Answered
Bulk upload working on arduino. But thingspeak graph update only shows last data entry, unless i refresh the page
ThingSpeak plots on your channel view should update in the interval defined in the plot settings (as fast as 15 seconds I think)...

environ un mois ago | 0

Answered
How to change state of a message to be true or false in jquery?
Perhaps you could try this jquery forum? Are you trying to chnage the status field in your channel feed? if so have a look at ...

environ un mois ago | 0

Answered
assign variable for the data read from channel
If you have a time control set for a specific time, that should take care of the running at a specific time. You could probably...

environ un mois ago | 1

| accepted

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