I would like to connect 8 arduino's together and I dont know how to do it.
7 of them are thermometers (1 per room in my house) and the last one is the thermostat collecting all temperatures and managing the central heating system.
I dont want to use expensive devices like wireless Xbee, bluetooth or wifi. Is it possible to do it with single wires using the RX-TX pins ?
- wich cables and how to connect ?
- wich arduino library and wich code ?
- how variables are moving from the code of one device to another ?
If not possible
- do you have another cheap solution ?
Many thx to all of you
John from Belgium