I am not too sure, it is for work and we got a custom board. My co worker who is more the hardware guy set it up. I did notice it is thin before 3.0 kernal. I saw in the 3.0 kernal they have more support. So we are basically up the creek without a paddle with the device and kernal 2.6. Would a RS-485 to RS-232 converter possibly fix the problems? On Sat, Nov 8, 2014 at 4:49 PM, John R Pierce <pierce at hogranch.com> wrote: > On 11/8/2014 1:36 PM, Jason Ricles wrote: > >> Hi, I am trying to make a program in C to communicate with a temperature >> sensor over my serial port that uses RS-485 and is a half duplex. I am >> however having trouble getting the device into RS-485 mode, is it possible >> to use RS-485 mode in Centos 6.5 or does it only support RS-232 mode? >> > > standard legacy PC serial ports are strictly RS232C. RS485 is a 120 ohm > balanced line specification. What host-side serial port are you using > that has RS485 support? > > re: linux support, I found this: http://retis.sssup.it/~ > scordino/code/rs485.html which suggests '485 support is pretty thin > in Linux. > > > > -- > john r pierce 37N 122W > somewhere on the middle of the left coast > > _______________________________________________ > CentOS mailing list > CentOS at centos.org > http://lists.centos.org/mailman/listinfo/centos >