Keyboard and mouse simulation using Digispark Attiny85 USB microcontroller.
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Install Arduino IDE
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Install Digispark Board
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Goto File -> Preferences -> Settings -> Additional boards manager URLs: https://raw.githubusercontent.com/digistump/arduino-boards-index/master/package_digistump_index.json
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Goto Tools -> Board -> Boards Manager
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Search using keyword "Digi": Install "Digistump AVR Boards"
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Select Board
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Tools -> Board -> Digistump AVR Boards -> Digispark (Default - 16.5mhz)
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Open sketch Mouse.ino in Arduino IDE -> File -> Open
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Click on top left icon "Verify"
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Uploading Firmware
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Make sure the USB device is disconnected
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Click on "Upload"
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Insert USB device within 60 seconds
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You should see the following log
Sketch uses 2908 bytes (48%) of program storage space. Maximum is 6012 bytes. Global variables use 93 bytes of dynamic memory. Running Digispark Uploader... Plug in device now... (will timeout in 60 seconds) > Please plug in the device ... > Press CTRL+C to terminate the program. > Device is found! connecting: 16% complete connecting: 22% complete connecting: 28% complete connecting: 33% complete > Device has firmware version 1.6 > Available space for user applications: 6012 bytes > Suggested sleep time between sending pages: 8ms > Whole page count: 94 page size: 64 > Erase function sleep duration: 752ms parsing: 50% complete > Erasing the memory ... erasing: 55% complete erasing: 60% complete erasing: 65% complete > Starting to upload ... writing: 70% complete writing: 75% complete writing: 80% complete > Starting the user app ... running: 100% complete >> Micronucleus done. Thank you!
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https://github.com/chris408/digispark-usbkey-board
https://www.youtube.com/watch?v=eW9WgPlcPAw
https://forum.arduino.cc/t/digistump-avr-boards-not-available-in-arduino-ide-2-2-1/1189049