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https://www.thingiverse.com/thing:2398231
Otto DIY+ Arduino Bluetooth robot easy to 3Dprint by cparrapa is licensed under the Creative Commons - Attribution - Share Alike license.
http://creativecommons.org/licenses/by-sa/3.0/

# Summary

Who is Otto DIY+ (PLUS)?
===========
Otto DIY+ is the improved and advanced version of original #OttoDIY, have the same base features DIY robot + Bluetooth control and programming + metal gear servo motors MG90S + optional rechargeable + changing modes by touch sensors + sound sensor + your unlimited imagination
<div style="position:relative;height:0;padding-bottom:56.25%"><iframe src="https://www.youtube.com/embed/gaYQBl3HJb0?ecver=2" width="640" height="360" frameborder="0" style="position:absolute;width:100%;height:100%;left:0" allowfullscreen></iframe></div>
Otto DIY+ is a forever open for improvements!, developed by a broad international and diverse community of Otto builders, 

buy our full kits!
=======
Visit http://www.ottodiy.com/

List of parts:
===============
1. Arduino Nano;
2. Arduino Nano Shield I/O Extension Board Expansion XD-212
3. Mini usb cable.
4. HC-SR04 Ultrasound sensor.
5. Mini servo MG90 9g x4 (each one should come with 2 pointed screws and one small screw also arm keys to attach legs and feet).
6. passive Buzzer 12mm 5V
7. Female to Female breadboard connectors cable 10cm x24.
8. 4 AA Battery case
9. 1.5V AA batteries x4.
10. Phillips screwdriver (important magnetized)
11. micro Switch 8x8mm
12. Touch sensors x3
13. Sound sensor
14. Bluetooth module HC-05 or HC06 or BLE

And then you only need to 3D print 6 parts in total:
15. 3D printed head.
16. 3D printed body.
17. 3D printed leg x2.
18. 3D printed right foot.
19. 3D printed left foot.



How to build your own Otto?
===========
Recommended to first check all documentation for Otto DIY if you are a beginner and then you can try to play with more advanced features with Otto DIY+

use the Mini USB cable to power your circuit from your computer or a USB socket.

Codes, Bluetooth & APP
===========
Codes for Bluetooth already here:  https://github.com/OttoDIY/PLUS
The APP is ready! 
get the .apk here https://github.com/OttoDIY/PLUS/tree/master/APP
and you can make your own using our app inventor template

You can use MBlock for simple an easy graphical programming

Otto builder group
===========
So for any issue or question please follow this topic
https://www.thingiverse.com/groups/ottodiy/topic:16553

Thanks to Brandon Bowles we have a Thingiverse customizer, so you can change easily the size and parameters as you desire 
https://www.thingiverse.com/thing:2457865