dropController Arduino Sketch

dropController V2 Arduino Sketch 2019_V2_001. For use on the version 2 device.
dropController V3 Arduino Sketch 2019_V3_003. For use on the version 3 device.


2019_V3_001 New version release
2019_V3_002 Corrected the pins used for the Bluetooth module
2019_V3_003 Added !Serial for Leonardo & Micro
Changed the non-connected blink rate



The Arduino sketches requires the digitalIOPerformance library. This is actually outdated but still works with all 328 based Arduinos like the Nano. I have tried in Arduino IDE 1.6.3 and 1.8.5 and the sketch compiles fine. The library does not work with newer non 328P based Arduinos such as the Arduino Micro & Leonardo which are based on the ATmega32U4 chip.

Arduinos are fairly slow at switching pins on an off and digitalIOPerformance speeds things up by cutting out a lot of unnecessary functions the Arduino normal performs. It only works on older Arduinos though. On Arduinos that it does not support the code defaults to the regular Arduino way. In practice I am not sure this makes a difference when using solenoid valves.


Android App

The new Android app is not yet available on the Play Store so for now please side load. The download contains the apk file and also the App Inventor 2 aia file.
dropController Android app version 2019_001_001
dropController Android app version 2019_001_003


2019_001_001 Adapted the version 3 app. Initial release.
2019_001_003 Added flash trigger 3.
Added a drop data graph. This adds a visual representation of the drop times.
Minor bug fix.


Windows Program

dropController Windows App version 2019_004 Build
The Windows program does not need to be installed and is run directly from a folder. It requires the .net framework, minimum version 4.0, available at Microsoft .net 4.0 download page and will run on Windows XP SP2 and above.


Windows Program Source Files

dropController Windows App version 2019_004 Build source files
The Windows app was written in Visual Basic 2017 using the Visual Studio 2017 Community IDE.

Visual Studio 2017 Community is free to use for students, open source contributors and small development teams and it is available for download at The download is just the installer which will download the main program from the internet. An offline installer is not available for Visual Studio 2017 Community.


dropController V1 – Original Version

The original version used a keypad and LCD and was far more complex and inconvenient to use. For those interested see dropController Original version. The page includes a download link for the Arduino sketch. The sketch is heavily commented so you should be able to follow what it does.
This version is no longer supported and I may not be able to answer questions about it.