Christopher Stapels

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Usin Thingspeak to control a remote device?
Good examples, @Vinod Also, this example shows specifically remote physical control though unfotunately uses esp8266. Still, I ...

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Laws of motion 1

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Laws of motion 2

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Laws of motion 3

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Laws of motion 4
Given the initial velocity 'u', final velocity 'v' and acceleration 'a', find the distance travelled.

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Laws of motion 5
Calculate the force is u are given mass and acceleration.

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Laws of motion 6

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Make roundn function
Make roundn function using round. x=0.55555 y=function(x,1) y=1 y=function(x,2) y=0.6 y=function(x,3) ...

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Sum the 'edge' values of a matrix
Sum the 'edge' values of an input matrix (the values along the perimeter). Example [1 2 3 4 5 6 7 8 9] Output = ...

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Find the Oldest Person in a Room
Given two input vectors: * |name| - user last names * |age| - corresponding age of the person Return the name of the ol...

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Chaîne

NatickFrizz
Natick high School signup page

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The twelve days of Christmas
Traditionally there are twelve days of Christmas to celebrate ("Twelvetide"), typically starting with Christmas Day (25 December...

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How to fetch and visualise live data from thingspeak fields in Matlab app designer
This is a terrific application. App designer can really give customizable control the main web UI cant offer. I wrote this fil...

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Cannot display the map and mapdata correctly
Locations are not automatically filled in. If your device writes data to the fields Latitude and Longitude then they will exist ...

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How can I make simulink model of Integrated control and monitoring system with digital electronic board, sensor and wireless sensor to send data to thingspeak ?
We have a great support package for Arduino, which will allow ou to use the ThinkSpeakRead block in your model and deploy to the...

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How to access files on Matlab Drive from Thingspeak Analysis App
Unfortunately at present you cannot access MATLAB drive content via ThingSpeak analysis or visualizations. I will add your requ...

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Historial en los charts
It is not clear what app you are using to view your ThingSpeak data, but I do not think the app you show it is specifically supp...

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thingspeak server closing connection immediately
Usually that means an authentication issue. Can you ensure the device is set up correctly and it is allowed to publish to the c...

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Confusion using thingsspeak in MATLAB(How to turn on relevant lamps depending on signal recieved from thingsspeak)
Have a look at this video series, especially in the fourth video, where we talk about remotely controlling objects. https://mat...

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data stops after 6-7 transmissions
I recomend using the ThingSpeak library - it takes care of much of the network connectivity for you. Are you sure its not one o...

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String Logic 19
Examples: 'DIG' --> 'I' 'IMPORTANT' --> 'MOTN' 'DEAL' --> 'EL' 'LIMB' --> 'IB' 'MOSTLY' --> 'OTY'

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Binary numbers
Given a positive, scalar integer n, create a (2^n)-by-n double-precision matrix containing the binary numbers from 0 through 2^n...

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Find out sum and carry of Binary adder
Find out sum and carry of a binary adder if previous carry is given with two bits (x and y) for addition. Examples Previo...

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Convert given decimal number to binary number.
Convert given decimal number to binary number. Example x=10, then answer must be 1010.

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Create a cell array out of a struct
Create a cell array out of a (single) struct with the fieldname in the first column and the value in the second column: in: ...

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Can't send data from ChirpStack to TS
You don't seem to have included any data, at least in what you have shown above. If you are including data and you see the numb...

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401 error code when trying to bulk-write to Thingspeak using AT-COMMAND
The bulk endpoint requires a somewhat complex syntax. Check out the bulk JSON update page here. You aren't providing all the c...

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Error sending data to ThingSpeak - Data Intervals??
Generally I'd look at the code. ThingSpeak will only reject your data if you send it too fast or format it wrong, but it seems ...

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How do I display all the data, not just the last 30 minutes or so
You can use the pencil icon in the upper right of the standard field plots on your ThingSpeak channel to show more data, assumin...

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The write channel is same as read channel data. Why the data is not processed?
a = 1:5 for i = 1: length(a) out = i * a(i) end If you read more then one value from your channel at a time, then length...

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Christopher Stapels

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