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--- a5:octopi-zero [2018/02/19 02:39] – created cedric
+++ a5:octopi-zero [2018/02/19 03:24] – cedric
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 (work in progress Sam :) )
 ====== PIZERO OCTOPI ======
 This quick guide is an example of how you can you a **Raspberry Pi ZERO W** as an Octoprint controller.
@@ Line 7: / Line 6: @@
 The recommended setup is still to use a Raspi3, as it has more CPU power and full width USB ports, however I do believe a PiZero setup works quite well, and has the benefit to be extremely small, non invasive, and can even fit on the A3S/A5 screws in an elegant way.
-{{:a5:ced_2018-02-18_16h26_img_0684.jpg?400|}}
+{{:a5:ced_2018-02-18_16h26_img_0684.jpg?800|}}
 Detail
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 {{:a5:ced_2018-02-18_16h09_img_0683.jpg?400|}}
-SERIAL PORT
+What I do like about my own setup is that I can see not only the material beeing printed (to check if all is good), but also the spool moves, which **looks great when doing timelapses** with OctoPrint.
+Additionnally, on the PWM and IO ports of the ZERO ; you can easyly add lighting LEDs and/or a button to cancel prints (topics not covered here)
+==== Stuff you'll need ====
+  * Raspberry Pi official pizero case (comes with short camera cable https://www.kiwi-electronics.nl/image/cache/data/products/raspberry-pi/zero/cases/KW-1824-2-1000x667.jpg )
+  * Raspberry **Cam V2** (comes with long camera cable : we don't need it here https://www.kiwi-electronics.nl/image/cache/data/products/raspberry-pi/camera/KW-1703-1-1000x667.jpg )
+  * Raspberry **PI ZERO W** ( W for wireless )
+  * 1x USB cable ( **USB2 to Micro USB** : for power - https://www.modmypi.com/image/cache/data/rpi-products/accessories/usb/microUSB-800x609.jpg )
+  * 1x micro USB OTG adapter (http://img.dxcdn.com/productimages/sku_221801_1.jpg) ( to adapt the blue "data" cable to micro USB )
+  * or alternatively, if you found one, a direct **MicroUSB to USBtypeB 2.0 cable** (not easy to find but exists)
+Everything can be put together in the case
+  - The Pi
+  - The Camera
+  - The little cable
+You should end up with this
+{{:a5:raspberry-pi-zero-w-840x485.jpg?600|}}
+Now - as covered in multiple other tutorials, simply find an image of Octoprint for Pi (https://octoprint.org/download/) flash it on a MicroSD card ( 16 GB or more recommended )
+As the PIZERO doesn't know your network settings yet, mount the flash drive in a PC and edit the network config for your SSID and password.
+Then put it in the PIZERO and verify it gets an ip adress (eg : in your router)
+Try connecting to it with it's ip, or maybe http://octopi.local if proper dns resolution is in place.
+==== Serial port ====
 You should setup the Octoprint to use /dev/ttyAMA0 if the "auto" setting does not work.
 You should hardwire the data rate at 250,000
-CAMERA
+As Samuel points out, it is important you disable some error handling
+{{:a5:octo1.png?400|}}
+The communication between the LCD panel and the REPRAP board can spit out error message that could be interpreted by Octoprint as a print problem (which they are not) and would cancel a print.
+==== Camera ====
+You can of course put your camera wherever you see fit. I did put it next to the extruder, as it gives me a nice view of the current printing process, and it's not obstructing access to the printer.
+{{:a5:octo2.png?800|}}
 You should use the 4:3 setting in Octoprint.
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 However, I don't recommend you go much higher than that, as Octopi is already streaming at a ridiculous 10Mbps for that resolution. Also, the focus of the V2 is not very sharp anyway, so it's a bit of a waste of bandwidth. YMMV.
-Should you wish to change the resolution of the cam, edit
+Should you wish to change the resolution of the cam,
-/boot/config.txt
+edit /boot/config.txt
 Here are some settings you can try
+<code>
 #default : 640x480 10fps. Streams at 10Mbps which is already a lot.
 camera_raspi_options="-fps 10"
@@ Line 47: / Line 90: @@
 # Notes: Using 16:9 aspect crops your field of view so you will see less
 #camera_raspi_options="-x 1280 -y 720 -fps 30 -quality 95"
+</code>
+Don't listen to tutorials saying you to reboot the box after editing this file (?) simply do a
+**service restart webcamd** (as root)
+Then reload you browser window.
+==== Hardware setup ====
+in progress
+==== Final comments ====
+The Octoprint website is not very clear ; they "do not recommend" the PiZERO for a setup, but the related bug ( https://github.com/guysoft/OctoPi/issues/318#issuecomment-284762963 ) has been closed since a long time, and many people report this works fine for them.
+And so do I.
+**As long as you limit the bandwidth of the webcam**, which makes sense anyway for such a small and wifi device, I've never seen more than 17% cpu usage for streaming. You can even go lower than that by limiting FPS.
+My experience has been very positive so far with a PizeroW setup as an octopi, it's also great to use with smartphone apps ( like "octoprint remote" and others ) by scanning the qR code.
+I hope you enjoyed this little tutorial and that it inspired you to **think "out of the box"** and try things by yourself. :)
+**--CEDRIC**

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