https://www.facebook.com/ottodiy/
https://www.facebook.com/groups/1185986408211522/
https://www.youtube.com/channel/UC3ER5xv3Nlmiv26anXU9Nwg/featured
https://www.instagram.com/explore/tags/ottodiy/
https://www.thingiverse.com/groups/ottodiy/
https://www.tinkercad.com/search/?q=otto
https://www.hackster.io/ottodiy
http://www.instructables.com/id/Otto-DIY-Arduino-Bluetooth-Robot-Easy-to-3Dprint/
http://www.mblock.cc/extensions/
http://www.mblock.cc/docs/create-extensions-for-mblock/
http://download.makeblock.com/mblock/mblock_extension_guide.pdf
https://github.com/arduino/Arduino/wiki/Library-Manager-FAQ
https://create.arduino.cc/projecthub?f=1
https://create.arduino.cc/projecthub/search?q=otto
https://github.com/sushicodeur/OttoOnEsp
https://github.com/FelixLinSY/IoTTo
https://github.com/jarsoftelectrical/OTTO-DIY---app
https://github.com/ramsoni08/Otto-Robo
https://github.com/OttoDIY/Matrix_hands
https://github.com/MexRoboTics/OttoDIY-MXR
https://github.com/patolinlp/OttoRemoteControl-Arduino
https://github.com/jarsoftelectrical/OTTO-Wheeled
https://github.com/dlevstek/Otto
https://github.com/TrendonixNetwork/Totto
https://github.com/jarsoftelectrical/My-OTTO
https://github.com/cmmakerclub/OTTO
https://www.youtube.com/watch?v=_1j03H7cwnY&list=PLM8mB7UZ2USdlarFKv-UfXQbgmiuqSqAN&index=10
https://github.com/OttoDIY/DIY
https://github.com/OttoDIY/PLUS
https://github.com/overdrivemachines/OttoIFL
https://github.com/sfranzyshen/OttoIFL_WiFi
https://github.com/stembotvn/OttoDIY_mBlock_Extension
https://github.com/OttoDIY/OttoDIY_mBlock_Extension
https://github.com/stembotvn/OttoDIY_XYZ_Examples
https://github.com/martin2250/ADCTouch
https://github.com/earlephilhower/ESP8266Audio - AudioOutputI2SNoDAC
https://github.com/plerup/espsoftwareserial - SoftwareSerial