display a graph with sensor values.

[yawns]

Yes, of course. There are several ways to do so. First important thing to know is how you get and store your data. Do you want to collect the data and store it in a csv/xml/json/… file? Do you have an interface to retrieve data from, maybe a little webserver for the sensors?

[icripps]

@yawns my sensors will upload the sensor values to thingspeak.com. do you know how I can get the values from the thingspeak.com and make a graph out of it on the magic mirror ?

[sdetweil]

@icripps says has api to read data

https://www.mathworks.com/help/thingspeak/read-data-from-channel.html

[icripps]

@sdetweil thats Great, but how do I use the api? With magic mirror

[sdetweil]

@sdetweil i have an arduino device collecting samples from a water well system (2 flow sensors and 1 volume sensor)… I use Blynk to post the data to a cloud server, and then I use their data api to retrieve the data and a charting tool to present 2 sensors of data on MM.

i wrote my own module

i also use the blynk mobile app to display the data in near realtime…

[sdetweil]

@icripps api definition says data can be returned in json format… and you might be able to use the MMM-Chart module

https://github.com/Snille/MMM-Chart