Hello Mikael.
Thanks to your help, I am getting closer to my final solution for a heating control project of my appartment. I am thinking in choosing a location for my esp8266 gateway in a room close to some of my sensors and actuators which could then be wired directly to this esp8266 circuit. This gateway will also have a RF component attached "nRF24L01+" and this will allow RF communication with the rest of the nodes.
for any temperature sensor nodes which I cannot wire to the gateway I found very interesting the sensebender micro you mentioned in other post.
For the radiator valve actuator I find very interesting a video on using a relay posted by petewill. I am also trying to understand the section about "AC-DC double solid state relay module" posted by Aproxx and Hex. I guess that module is meant to be used by lights rather than a water valve actuator which is more like a motor. My valve actuators require 230v, uses a maximum of 5 wats and they just have on/off possition. I hope I could use something like this AC-DC double solid state relay.
I am looking forward to receive the pieces I ordered and start playing around. :-)
Thanks again
Carlos
depending on distance, another option (instead of NRF24) is to use RFM69, which is sub-ghz, which in general has a better radio coverage, than 2.4Ghz, like the NRF24 operates on.
RFM69 can be combined with both arduino and esp8266.
