Using one temp sensor and a channel with one field worked with the write API key created and inserted at the sensor IP adress (works over wifi).
I then added a dual sensor for temp and humidity on another IP address in the LAN and gave that sensor a new write API key. This does not display correctly although I named two more fields.
There hiatus in my understanding of how Thingspeak field charts work and connect to a specific API key.
Lets assume that the sensors are TempRoom1 (with one write API key), TempRoom2 and HumRoom2 (these share another write API key that i created in that channel with the API creator, i.e. the sensor web page only has a field for a common API key for temp and humidity). I create three charts and name them as the sensors.
Did I do it wrong? Should there only be one API key for both sets of sensors? How is sensor data communicated to a specific chart since there is no logical link between a specific sensor and a chart. Does the name of a chart have any role?
If I fouled up my channel, is it enough to create a new channel and give the sensors one or two new API keys?
Is there any link between the note that can be saved and the name of the Field chart?
I'm a total beginner with this and would appreciate your help.
(Case: I rent a basement studio. During the summer while I'm absent for weeks, there is a risk that humid summer air will condense on the walls of the studio creating mold and discoloration. I can activate a heater fan remotely if relative humidity rises to risky levels. )