User manual

A possible tweet may look like this:
Testing my #cheerlights project on my #NanoESP with the
color blue #ThingSpeak #IoT
This way, you can recolour the world.
The query for the current colour is implemented in the function getCheerlight-
Color()
. The parameters needed are the host, i.e. api.thingssspeak.com, and the URL, in
this case /channels/1417/field/1/last.txt. This is a simple TCP client query of the
known kind. Again, the server response is shortened again to the relevant text and
returned. The comparison with the keywords returns the desired colour, which is
then displayed with the Crossfade Library. A comparatively simple experiment with
a great learning effect.
5.6 | Twitter fire alarm with TalkBack function
This fire alarm project combines two elements that you have learned in the course
of your work with the learning package. The board is also used, among others, for
long-term monitoring of the temperature. At the same time, the board is used to
emit an alarm sound when the temperature exceeds a specific value, e.g. because
there is a fire. Monitoring when the threshold is exceeded is not the board's task
here, but that of the ThingSpeak-App React.
The fire alarm uses the NTC (Negative Temperature Coefficient) that is otherwise
presented only as light sensor alternative as a sensor now. It changes its resist-
ance depending on the temperature. You can switch it well against a 10-kOhm
resistor. However, in this case, the potentiometer
was used, since this permits further adjustment of
the measurement.
Required parts
1 x pinboard, 1 x NanoESP, 1 x potentiometer, 1 x piezo,
1 x NTC, 1 x RGB-LED, circuit wire