1.1 Insert the 0.28 inch voltmeter in its slot (you may need to force a little bit) and a 3V CR1220 battery in the battery holder. For 3 wires version voltmeter, solder the Black wire to the GND, the Red wire to the +5V and the remaining wire is your measuring testpoint (it’s also recommended to replace this wire by a jumper wire).
1.2 Plug the board on a 830 tie-points breadboard.
1.3 (Optional step) Solder 2 pins in 2.54 mm on the board to connect your +5V and GND to the power rails.
2. Install Arduino IDE
2.1. Go to arduino.cc
2.2. Download latest Arduino IDE Installer. (Release 1.8.5 or higher – Donations are highly encouraged!)
2.3. Install Arduino IDE.
2.4. Launch Arduino IDE so you can get something like this:
2.5 Go to File>Preferences and activate “Display line numbers”
3. Connect your DevDuino
3.1. Connect your DevDuino to your computer with a USB cable (Micro-B) and make sure it is powered on by selecting the slider to ON.
You should normally get the following screen:
3.2. On your Arduino IDE: Go to Tools>Board and select Arduino Leonardo.
3.3. Then go to Tools>Port and select the COM Port connected to: (Arduino Leonardo).
4. Installation DevDuino Library
4.1. Download the DevDuino Library: DevDuino Library (do not extract it)
4.2. On your Arduino IDE: Click on Sketch>Include Library and add the downloaded ZIP Library.
4.3. Check that the library has been successfully added.
5. Upload Examples
5.1. Go to File>Examples>DevDuino and select one of the examples
5.2 Upload your Example:
RX LED and TX LED should be blinking while uploading:
5.3 Wait until your example has been successfully uploaded:
5.4 See the result
6. Set the Real Time Clock
6.1 Place a 3V CR1220 battery in the battery holder.
6.2 Open the DevDuino example called: “rtc”
6.3 Edit line 34 the affected value to SET_RTC from “false” to “true” and update the date and time in the 24hours format:
6.4 Upload the example
Note: Unless you edit the affected value to SET_RTC from “true” to “false”, it’s gonna reset the date and time every time you are going to upload this example.