Revolution Pi PiControl

How can I read out several variables at once?

You can do this in two steps.

ask for offsets and length of the variables

pi@RevPi99988:~ $ piTest -d
Found 1 devices:

Address: 0 module type: 136 (0x88) RevPi Connect 4 V1.0
Module is present
     input offset: 0 length: 6
    output offset: 6 length: 7

then output them - here we read out all inputs of the RevPi Connect 4

pi@RevPi99988:~ $ piTest -1 -r 0,6,h
01 00 00 00 2d 96

Looking at PiCtory the values can be decoded as follows