Hi, I am following the instruction here,
http://wiki.rapiro.com/page/installing_distance_sensor/

I loaded oga's firmware. (it is confirmed because the "#M00" - "#M10" commands are working)
From raspberry pi's python console (With sudo), I will the following

{{{
import sys
import time
import serial
import colorsys

# config
SENSOR_PIN = 6
RAPIRO_TTY = '/dev/ttyAMA0'
rapiro = serial.Serial(RAPIRO_TTY, 57600, timeout = 10)
value = 0

# version check
rapiro.write("#V")
time.sleep(0.05)
version = ""
while rapiro.inWaiting():
version += rapiro.read(1)

print(version)
}}}
it prints nothing.

If I run a "$ sudo last -f /dev/ttyAMA0" in another terminal,
I got a error message right after the rapiro.write("#V")
last: seek failed!

Any idea?