adigyran

my opinion is methods in Pneumatic craft only active when CC is installed. Try just install CC,Open computer and Open components. OpenPeripherals and rest i think you don`t need (this just example, i even have access to computer craft peripherals in OC if i have CC) (Sorry for grammar mistakes, English is not  my native language)

http://minecraft.curseforge.com/mc-mods/224125-pneumaticcraft/files

just install CC, and don`t use, what`s problem with that? 

proof that works

ComputerCraft1.64

Computronics-1.7.10-1.0.5

OpenComponents-MC1.7.10-0.2.0.20-universal

OpenComputers-MC1.7.10-1.3.4.63-universal

OpenPeripheralAddons-1.7.10-0.2.0-snapshot-122

OpenPeripheralCore-1.7.10-0.5.0-snapshot-142

PneumaticCraft-1.7.10-1.2.8-15-universal

all this stuff works both in CC and OC for me through adapter block

Ok, Then your in the wrong forum, I'm in Opencomputers forum. You should have posted your info in the cmputercraft forum. I need help using Opencomputers. No wonder I couldn't find any thing.

and i have ComputerCraft1.64pr5

OpenPeripheralAddons-1.7.10-0.2.0-snapshot-122

OpenPeripheralCore-1.7.10-0.5.0-snapshot-142

maybe this not work, because you don`t have computer craft? Try to install.

OpenComponents-MC1.7.10-0.2.0.20-universal

OpenComputers-MC1.7.10-1.3.4.63-universal

PneumaticCraft-1.2.6

updated to

PneumaticCraft-1.7.10-1.2.8-15-universal, works well

this method works well

you need connect pressure gauge faced to the adapter

you can use many adapters, but you need to use proxy address to access.

you need adapter, place compressor  to adapter (or adapter to compressor), 

component = require("component")

compressor = component.air_compressor

local pressure = 0

while true do

pressure =  compressor.getPressure()

end

cycles or anything else completely the same  

please explain how use this with railcraft.