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Christopher Stapels

MathWorks

Last seen: Today Active since 2016

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Answered
[RESOLVED] How to send data from my Arduino to Thingspeak using a GSM SIM800c ?
Seems like you have made a nice start on your first project! You seem pretty close to the goal. Since you shared the API key, I...

6 días ago | 0

| accepted

Answered
Displaying dates instead of minutes in 3 day comparison
The temperature example you used is a way to compare three different ranges of times onthe same plot. You can read the timestam...

7 días ago | 0

Answered
Connecting to ThinkSpeak With Esp8266 and FireBeetle board Errors
Why not try the ThingSpeak library for Arduino and ESP and others ? I think its a lot easier than using the AT command set.

8 días ago | 0

Channel


ShakeFreq
15 second moving mean of the shake data

13 días ago

Answered
How to retrieve data from thingspeak to unity using rest API ?
You can use the Read Data endpoint to get data from ThingSpeak along with UnityWebRequest in Unity. You can also use the MQTT...

14 días ago | 0

Answered
Receive Notification when Data not Coming
Yes, this definitely possible. Have a look at the no data check section for the React App help. Also you could write a MATLAB...

18 días ago | 0

| accepted

Answered
Can someone help me with this coding? When I run it always says No data read, it should be show the result I write there because it already passed the conditions
I just read your channel and there is no data in the past day. NumDays ,1 privides the data from the last day starting now. Yo...

alrededor de 2 meses ago | 0

| accepted

Answered
Can someone help me with this coding? When I run it always says No data read, it should be show the result I write there because it already passed the conditions
Channel 1517893 is not public. In this line: temperatureData = thingSpeakRead(channelID,'NumDays',1,'Fields',1); you wil need...

alrededor de 2 meses ago | 0

Answered
HTTP Post - No data at receiver
Instead of thingHTTP, I would reccomend you use a MATLAB analysis. You can use the webwrite command to create a POST. There is ...

3 meses ago | 0

Answered
Show value from thingspeak in excel
Here is one example.

4 meses ago | 1

Channel


DataTarget

4 meses ago

Answered
Send message or command to BBC Micro Bit
I think MQTT is the best way to acheive this. I havent used a micro bit, but I found some examples showing how to connect to an...

4 meses ago | 0

Answered
Two graphs in one ThingSpeak window
Have a look at this example. It does some manipulation to make sure the x axis are the same, you may not need to do that in your...

4 meses ago | 0

| accepted

Answered
Why I can't sent emails with Matlab Analysis? (Having error 429).
See Error Codes. 429 is too many requests. You can see the limits on the send alert page in the limitations section. I recco...

5 meses ago | 0

Answered
ThingSpeak Communications Library - how to read multiple fields with one fetch
The latest version of the library supports multiple reads! See this post.

5 meses ago | 0

| accepted

Answered
Things Stack (TTN v3) howto write lorawan message information to ThingSpeak stream
Right now that data is not available directly from the ThingSpeak integration. We will consider it an enhancement request, than...

5 meses ago | 0

| accepted

Channel


Shake
Shake Data

5 meses ago

Answered
Can I use One ESP32 Device to update 2 ThingSpeak Channels?
Yes you can but the code you wrote wont do it. I would start with the ThingSpeak library for Arduino, ESP8266 and ESP32. Use t...

5 meses ago | 0

| accepted

Answered
Daily average of a temperature
You can use the pencil icon on the top of the ThingSpeak plot to make the timeScale Daily. Also, you can write the output fro...

5 meses ago | 0

Answered
How to insert a .m file from matlab into ThinkSpeak matlab?
You can run a MATLAB file that does not produce a visual output in the MATLAB analysis app. For visualization outputs, use the ...

6 meses ago | 1

Answered
Daily sum in bar chart is wrong
I tried this in one of my channels and it seems to work fine. I wonder if there is something different about your data. Can yo...

6 meses ago | 0

| accepted

Answered
New User Thingspeak data
Can either of you share your channel ID if they are public? Then we can have a look at the data you are sending and see what is...

6 meses ago | 0

Answered
Bar Graph legend & x axis
This looks like an interesteing application. Can you tell us more about what you are monitoring?

6 meses ago | 0

Answered
Getting -401 error code when using WritingMulitpleFields
There are two calls to writefields in your code, I don't see a delay between them. I see a delay at the end of 20 seconds. I wo...

8 meses ago | 1

| accepted

Answered
Raspberry Pi - MQTT Publish & MQTT Subscribe- Updating Multiple Fields In one MQTT publish request and vice versa
Your message needs to be of the form 'field1=value&field2=value2' etc. If you use the update single field topic instead of the ...

9 meses ago | 0

Answered
Sometimes not receiving email alerts from Thingspeak
See the limitations section on the send alerts page. The resrictions can be a bit tight especially when you are debugging. If ...

9 meses ago | 0

Answered
My public channel signs me out and I have to login every time I view my public channel.
We aplogize for the inconvienience. Please see this post for more information. Public View is no longer public

9 meses ago | 0

Channel


Environmental Monitor
For demonstrating writing to a channel in presentations

9 meses ago

Answered
Sometimes not receiving email alerts from Thingspeak
You can look at your alerts history here, but it does not record failed attempts. I suggest that you can change your MATLAB ode ...

9 meses ago | 0

| accepted

Answered
how to read channel status using thingSpeakRead in Matlab?
Our up time is really high, there is no reason the channel should be unavailable. Can you show the format of the command you ar...

9 meses ago | 0

| accepted

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