require "i2c"
ADRS = 0x5c          # LPS25H
NODE = "/dev/i2c-1"  # I2C device node

i2c = I2C.create(NODE)
res = i2c.read(ADRS, 1, 0x0f)
printf "RESULT: 0x%02x\n", res.getbyte(0)