comparison of multiple thing speak fields with mat lab

Is it possible to set up Matlab to compare thing speak field values.

Field 4 = 1 and Field 5 = 1 and Field 1 > 4 then

delay 30 secounds

Alert message " xxxxxxxxx"

[avram alter]

are you talking about using the function thingspeakread()? you can probably use logical evaluators within the paramteters you discussed like so

field1 = % setr these variables to the appropriate channels/value/etc
field2 =
field3 =
field4 = 
field5 = 
if field4 == 1 && field5 == 1 && field1 > field4
    disp('XXXXXXXXX')
end

[Dayne Gilleland]

Thanks

I am now having trouble using Thingspeak Alert API consistantly to generate email message when conditions are correct with the MATLAB code. The code does not fault but I get the error message, " Failed to send alert: The server returned the status 429 with message "Too Many Requests" in response to the request to URL https://api.thingspeak.com/alerts/send. sometimes, not everytime.

[avram alter]

According to the thingSpeak alert documentation in MATLAB, Under limitations:

"Users are limited to 2 alerts every 30 minutes. The rate limit is applied when the request is made, not when the email is sent. If you exceed the request limit, the API returns the response code 429."

you can read more about that here:

https://www.mathworks.com/help/thingspeak/sendalert.html

Answer 1

[avram alter]

you can set your fields to variables, and use logical evaluators under your personal parameters:

field1 = %set this to equal the appropriate channel/value/etc
field2 =
field3 =
field4 =
field5 =

if field4 == 1 && field5 == 1 && field1 > field4
    disp('XXXXXXXXX')
end