good day. I have developed a device using arduino uno. this device consists of several sensors. gives the values of the sensors to the computer. I’ve done it but for a single device, multiple devices to a computer that will use and how to take data from all thedevices you need to install a communications network which need to use auxiliary equipment. max 100 and 300 meters betweendevices may be computers. I want to find solutions to the wired and wireless. I would be glad if you help. good work.
How many sensors ? How much data ? How often ? Is there a latency requirement ? What bit rates ? What error rates are tolerable ?
Have you looked at USB extenders or using an Ethernet sheild on the Arduinos ?
temp,humidity,gas and water sensor delay(1000) 
9600 baundrate. there is a computer near devices and take data from devices. how can I connect all devices peer to peer from computer.
http://www.sparkfun.com/products/9026
… and use repeater for the longer runs if needed.
Or port from the Uno to …
for wireless, look at wifly.
Xbee.
Zigbee Mesh.
Created for sensor networks.
etrbet:
good day. I have developed a device using arduino uno. this device consists of several sensors. gives the values of the sensors to the computer. I’ve done it but for a single device, multiple devices to a computer that will use and how to take data from all thedevices you need to install a communications network which need to use auxiliary equipment. max 100 and 300 meters betweendevices may be computers. I want to find solutions to the wired and wireless. I would be glad if you help. good work.
You could use an Ethernet Shield. Once the data is on a network it can even be routed over the Internet or plugged into a WiFi router used as a bridge. A wired Ethernet also allows you to send power over the cable if you need that.
The network solution allows for any number of Arduino data loggers and does not requires special equipment on your computer.