I’m a newbie at this hardware stuff so I’m going to ask what most feel is a simple stuff but I don’t want to fry my Cobra.
I’m trying to connect the serial port on the back of a Crestron controller to COM1 of my Cobra. The Crestron controller’s serial port has pins 2,3, and 5 connected. I’m using 50 ft of Cat5e to connect to my Cobra. Can someone tell me how to connect this to my Cobra.
Remember I’m a complete newb and still getting my head around all this serial stuff
I’m confused why I need the 232 level converter IC. I’ve connected the serial port on the back of the Crestron controller to other equipment such as home security systems and AV receivers without issues. Can you explain this?
Also what kind of generally available wire would work best for serial communication over moderate distances (less than 100 feet). I’ve used Cat5e between this processor to my AV reciever without problems but if there is something better I’ll sure listen.
External rs232 ports (and I suppose on the crestron too) are using levels of up to -15v to +15v, while the com ports on the fez use TTL levels between 0 and 3v3 (and because the fez is 5v tolerant you can use a 5v converter).
I mostly use shielded liycy cable with .5mm wire section.