You need to have custom distribution. Prebuild image may not come with the latest version of ev3 module so make sure you follow instuction below to update it.
Once you have a working environment, connect to EV3 brick and launch Python (executed on EV3RSTORM):
$ ssh root@10.0.1.1
root@python-ev3:~# python
[GCC 4.6.3] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> import ev3
>>> ev3.open_all_devices()
>>> ev3.get_battery()
(6911.138911088911, 46.41822823641005, 0.0)
>>> ev3.set_led(ev3.LED_GREEN)
>>> ev3.close_all_devices()
Reading sensors:
>>> import ev3
>>> from ev3.sensor.lego import EV3TouchSensor
>>> ev3.open_all_devices()
>>> touch_sensor = EV3TouchSensor(ev3.SENSOR_1)
>>> while True:
... if touch_sensor.is_pressed(): print "pressed"
...
pressed # I've pressed touch sensor
(ctrl+c to break the loop)
Generated documentation available at readthedocs.org.
You may encounter the following problem:
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "/usr/local/lib/python2.7/dist-packages/ev3/__init__.py", line 72, in open_all_devices
analogdevice.open_device()
File "/usr/local/lib/python2.7/dist-packages/ev3/rawdevice/analogdevice.py", line 16, in open_device
_analogfile = os.open(lms2012.ANALOG_DEVICE_NAME, os.O_RDWR)
OSError: [Errno 2] No such file or directory: '/dev/lms_analog'
In such a situation please invoke:
# /etc/init.d/lms2012-driver.sh
Some parts are still not implemented or lack high level API - pull requests are welcome.
Configuring key based authorisation. This step is required only once:
$ ssh root@10.0.1.1 mkdir -p .ssh
$ cat ~/.ssh/id_rsa.pub | ssh root@10.0.1.1 'cat >> .ssh/authorized_keys'
Whenever you want to update ev3 module just invoke:
$ ./update.sh
Note: this may take a while.