# Display-o-tron 3000 Raspberry Pi 2 Errorno 2 **URL:** \ **Category:** Support\ **Created:** [July 5, 2015, 10:24pm UTC](https://forums.pimoroni.com/t/display-o-tron-3000-raspberry-pi-2-errorno-2/737 "2015-07-05T22:24:00Z")\ **Posts on this page:** 5\ **Page:** 1
**Author:** ![Tricky](https://avatars.discourse-cdn.com/v4/letter/t/d6d6ee/32.png) [@Tricky](https://forums.pimoroni.com/u/Tricky)\ **Post date:** [July 5, 2015, 10:24pm UTC](https://forums.pimoroni.com/t/display-o-tron-3000-raspberry-pi-2-errorno-2/737/1 "2015-07-05T22:24:00Z")
Hi, Tried to install the DOT3K on Raspberry Pi 2 and having no joy running the example code: pi@raspberrypi ~/Pimoroni/dot3k/basic python2 hello\_world.py Traceback (most recent call last): File "hello\_world.py", line 3, in \ import dot3k.lcd as lcd File "/usr/local/lib/python2.7/dist-packages/dot3k/lcd.py", line 3, in \ lcd = st7036.st7036(register\_select\_pin=25) File "/usr/local/lib/python2.7/dist-packages/st7036.py", line 20, in \_\_init\_\_ self.spi.open(0, spi\_chip\_select) IOError: [Errno 2] No such file or directory pi@raspberrypi ~/Pimoroni/dot3k/basic I’ve run the installer (curl [get.pimoroni.com/dot3k](http://get.pimoroni.com/dot3k) | bash) and enabled SPI I2C etc I’ve tried the update and upgrade on apt-get running a i2cdetect -q 1 gives me: pi@raspberrypi ~/Pimoroni/dot3k/basic $ i2cdetect -q 1 WARNING! This program can confuse your I2C bus, cause data loss and worse! I will probe file /dev/i2c-1 using quick write commands. I will probe address range 0x03-0x77. Continue? [Y/n] 0 1 2 3 4 5 6 7 8 9 a b c d e f 00: – -- – -- – -- – -- – -- – -- – 10: – -- – -- – -- – -- – -- – -- – -- – -- 20: – -- – -- – -- – -- – -- – -- – -- – -- 30: – -- – -- – -- – -- – -- – -- – -- – -- 40: – -- – -- – -- – -- – -- – -- – -- – -- 50: – -- – -- 54 – -- – -- – -- – -- – -- – 60: – -- – -- – -- – -- – -- – -- – -- – -- 70: – -- – -- – -- – -- Whereas i2cdetect -y 1 pi@raspberrypi ~/Pimoroni/dot3k/basic $ i2cdetect -y 1 0 1 2 3 4 5 6 7 8 9 a b c d e f 00: – -- – -- – -- – -- – -- – -- – 10: – -- – -- – -- – -- – -- – -- – -- – -- 20: – -- – -- – -- – -- – -- – -- – -- – -- 30: – -- – -- – -- – -- – -- – -- – -- – -- 40: – -- – -- – -- – -- – -- – -- – -- – -- 50: – -- – -- – -- – -- – -- – -- – -- – -- 60: – -- – -- – -- – -- – -- – -- – -- – -- 70: – -- – -- – -- – -- Can anyone help as I am starting to think I have a faulty unit? ---
**Author:** ![gadgetoid](https://sea2.discourse-cdn.com/flex016/user_avatar/forums.pimoroni.com/gadgetoid/32/13_2.png) [@gadgetoid](https://forums.pimoroni.com/u/gadgetoid)\ **Post date:** [July 6, 2015, 8:54am UTC](https://forums.pimoroni.com/t/display-o-tron-3000-raspberry-pi-2-errorno-2/737/2 "2015-07-06T08:54:42Z")
Ahoy! What you’re seeing is an SPI error, rather than an I2C one. Can you post the output of: `ls /dev/spi*` `lsmod` It might also be worth enabling SPI again through raspi-config. Also, how up-to-date is your Raspbian install? SPI/I2C issues seem to crop up a lot and are almost always fixed with a fresh Raspbian image- I still haven’t figured out why, though. ---
**Author:** ![Tricky](https://avatars.discourse-cdn.com/v4/letter/t/d6d6ee/32.png) [@Tricky](https://forums.pimoroni.com/u/Tricky)\ **Post date:** [July 6, 2015, 6:30pm UTC](https://forums.pimoroni.com/t/display-o-tron-3000-raspberry-pi-2-errorno-2/737/3 "2015-07-06T18:30:24Z")
pi@raspberrypi ~ $ ls /dev/spi\* ls: cannot access /dev/spi\*: No such file or directory lsmod has: pi@raspberrypi ~ $ lsmod Module Size Used by cfg80211 395318 0 rfkill 16651 1 cfg80211 i2c\_dev 6027 0 snd\_bcm2835 18850 3 snd\_pcm 75388 1 snd\_bcm2835 snd\_seq 53078 0 snd\_seq\_device 5628 1 snd\_seq snd\_timer 17784 2 snd\_pcm,snd\_seq snd 51667 11 snd\_bcm2835,snd\_timer,snd\_pcm,snd\_seq,snd\_seq\_device joydev 8903 0 i2c\_bcm2708 4990 0 evdev 9950 8 uio\_pdrv\_genirq 2958 0 uio 8119 1 uio\_pdrv\_genirq Tried the reenable SPI … raspi-config --\> " The SPI interface is enabled " Raspbian install is the latest image from the website. ---
**Author:** ![Tricky](https://avatars.discourse-cdn.com/v4/letter/t/d6d6ee/32.png) [@Tricky](https://forums.pimoroni.com/u/Tricky)\ **Post date:** [July 6, 2015, 7:31pm UTC](https://forums.pimoroni.com/t/display-o-tron-3000-raspberry-pi-2-errorno-2/737/4 "2015-07-06T19:31:50Z")
OK Took the original image I had for Raspbian (05-05-2015) Wheezy Wrote a new memory card 1st Book - Expanded File System, changed user passwd, enabled SPI Rebooted and I now have /dev/spidev0.0 and spidev0.1 Installed the DOT3K via Curl including demo files and it works! need to run python2 via sudo otherwise I get No access to /dev/mem? Will try work out what was stopping it as the only thing I’d done with previous install was amend font size in terminal via dkpg-reconfigure console-setup and installed Kernel for a 4DPi LCD Screen which was subsequently disabled. ---
**Author:** ![gadgetoid](https://sea2.discourse-cdn.com/flex016/user_avatar/forums.pimoroni.com/gadgetoid/32/13_2.png) [@gadgetoid](https://forums.pimoroni.com/u/gadgetoid)\ **Post date:** [July 7, 2015, 12:46pm UTC](https://forums.pimoroni.com/t/display-o-tron-3000-raspberry-pi-2-errorno-2/737/5 "2015-07-07T12:46:02Z")
You were running an alternate Kernel? ( IE: The LCD screen was disabled but not the kernel itself? ) From my own experience building Kernels it’s really easy to botch up SPI/I2C/GPIO functionality in a custom build. If you were running a custom, then that’d almost certainly be what went wrong :(