ethernet+2 arduino

Projects Networking, Protocols, and Devices
1

Hello,

I am from Spain and I started recently with arduino and I need your help. I want to control arduino by ethernet by another arduino: the first arduino has a temperature sensor and I want to activate a pin in the second arduino when the temperature is 20ºC. Like Master and Slave if I use SPI.
The second arduino is going to be in other place.

Is it possible???

thanksssssssss

2

Is it possible???

Yes, it is...

Assuming,,, of course,,, that both Arduinos have Ethernet shields... Do they???

Multiple punctuation marks look silly,,, don'''t they???

3

Both have ethernet shield. So I think I need 2 IP, gateway, subnet, 2 MAC, my router public IP and I have to open a port in my router.

What would be the reading code for the digital pin?

client.read(digitalRead(3));

I know its bad, what I have to change?

thanks!

4

client.read(digitalRead(3));

I know its bad, what I have to change?

Everything you need to make it compile. The digitalRead() will, presumably, be done on the Arduino that acts as a server, so the data is sent to clients using client.print(), not client.read(). The client.read() method takes no arguments, and is used on the client to read what the server sent.