Arduino with Ethernetshield: Get temperature via telnet

You can use Arduino with Ethernetshield to fetch temperatures over network.

I have created an little sketch for Arduino. This sketch has got an "telnet" server. If you connect to the IP address of the arduino, you will get the temperature from all connected DS1820 sensors.



The DS1820 sensor is build in the 6.2 inch female plug. I have only two sensors connected, but you can connect more sensors to the One Wire Bus. It works like the old digitemp system. But digitemp needs an serial connector. My Arduino works via Network - that's really cool!

I also created an munin plugin for this Arduino system. If you edit /etc/munin/plugin-conf.d/munin-node you can supply alias names for the hex address of the sensor.

[arduino_ds1820_192.168.1.3]
env.101f9dca18020 Jonas desk
env.105269ca180a6 PC power supply
timeout 60

You have to insert the timeout 60 because the system fetches the temperature from the sensors just in time, this needs some time