1. First, use the Hummingbird Firmware Burner to put your Hummingbird Duo into Arduino mode.
2. Install the Arduino IDE.
3. Run the Arduino IDE one time – simply open and close it. This may seem odd, but the first time Arduino launches it creates a number of folders that are necessary for our installation utility to operate properly.
4. Download the Hummingbird Arduino files.
5. Unzip and open the download.
6. Inside, there should be 3 folders: hardware, libraries and WindowsDrivers (Ignore the WindowsDrivers folder)
7. Locate your Arduino Sketchbook folder. Open the Arduino IDE and go to File > Preferences (Arduino > Preferences on a Mac). In the resulting menu, make note of the path to the Sketchbook IDE:
8. If there is already a hardware folder, copy the contents of the downloaded hardware folder into it. If there is already a libraries folder, copy the contents of the downloaded libraries folder into it.
If there is no hardware folder, move the downloaded hardware folder into the Arduino folder. If there is no libraries folder, move the downloaded libraries folder into the Arduino folder.
Here is what it should look like:
9. WINDOWS-ONLY. Go into the WindowsDrivers folder and double click runDriverInstall.bat.
10. Restart the Arduino IDE.