Serial Communication - 10KM range

[Sobakava]

I need to form a serial communication between two points and looking for a solution. First I thougt convert my uart Rs232 to RS485 but this is limited with 1.2KM without repeaters. I can not use repeaters because the wires will be buried into ground with a pipe with 2.5m radius.

I also thought about wireless connection but the nodes are not in line of sight.

Any recommendations? Is there a transceiver which is capable of transmitting 9600bit/s serial data over regular / twisted pair wires?

This connection is very cost sensitive so I do not want to use expensive and special devices etc.

Thanks

 

[IanP]

For that distance (10km) you have to consider optical fibre (Single-Mode) ..
Not only it provides noiseless, reliable data link but it is also cost effective ..
And 9600 baud is not a problem ..

eg.
https://www.ucs.co.uk/index.php?pid=943

Rgds,
IanP

 

[Sobakava]

Edit after I got price quotation for wires and wire mounting service costs :

I want to do this with wireless communication. The points are not in line of sight, there is a small peak between nodes. How can I form reliable wireless serial communication between those two points? 9600bps is fairly enough...

 

[angelote]

Learn about WiMax.

It is similar to WiFi, but in theory allows 48km links at 70Mbps, and doesn't need direct sight.

I don't know about cost, and you'll need some intelligent devices.

You will need two serial to ethernet converters, an two WiMAX access points to establish the link.

 

[wf_car]

Transfer RS485 to CAN?

 

[dani]

Why not GSM/GPRS/SMS ...?

Also Normall telephone line with 56K Fax modem is another option if you dont want to go for wirless...



Dani

 

[TekUT]

You can try with serial to Ethernet embedded device (like the TIBBO EM200) and use external repeater, but I've no idea about the overall cost.

Bye
Pow