Drone News & Drone Directory

Flyver – Drone Apps

The First Flyver Drone Meetup

On Thursday, March 26th, we hosted the first Flyver Drone Meetup. We are proud to say we consider it a success. A lot of friend were made, a lot of questions asked and answered, but most importantly, we set the foundations of a community. Flyver will host more of these events in the future in order to strengthen the drone enthusiast movement in Bulgaria and provide people with all the information they need in order to get involved in the drone revolution. If for some reason you didn’t manage to attend the event, but have some burning questions about drones in general, ask away in the comments below!

Some highlights of the evening:

The Phoenix RC Simulator was available to play around with all sorts of drones on a large screen. What a pleasure it is to fly a drone and crash without fear of consequences.



Trifon Mihaylov, one of the most experienced drone pilots in the country and president of the Bulgarian UAV Association, gave a lecture on drone safety, explaining to us all why drones need to be taken seriously.




For more photos from the event check out our facebook page.

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Flyver Explains: How to Add Additional Hardware

In Flyver all sensors and outputs are connected to the Flyver Message Queue. This makes the system very flexible and scalable, allowing for all kinds of devices to work with the SDK

Flyver Configuration I

IOIO OTG Sensors

Android / Java

Adding new IOIO sensors requires basic knowledge about input/outputs. This article assumes familiarity with the topic and that the user will be able to select the right pins.

Wire your sensor to the IOIO OTG board.

  1. Add a new class under FlyverCore -> statedata -> IOOISensors
  2. Extend the IOIOSensor class.
  3. Register pins under setup(). Details could be find under the IOIO OTG documentation
  4. Write your input data gathering under the loop of process(). Details could be find under the IOIO OTG documentation
  5. Send data thorough the message queue with sendData(Object); This data follows the selected topic and could be obtained back from anywhere though the consumer interface of the message queue.
  6. Initialize sensor under FlyverCore -> BaseApp.java

Existing sensor implementations There are already implementations of few sensors which could be used and modified easily. FlyverCore -> statedata -> IOIOSensors


public class UsRangeFinder extends IOIOSensor{

private int triggerPin;
private int echoPin;
float distance;
private PwmOutput trigger; // Ultrasonic range finder trigger
private PulseInput echo;  // Ultrasoni range finder echo

public UsRangeFinder(String TOPIC, int triggerPin, int echoPin) {
    this.triggerPin = triggerPin;
    this.echoPin = echoPin;


public void setup(IOIO ioio_) throws ConnectionLostException {

    echo = ioio_.openPulseInput(echoPin, PulseInput.PulseMode.POSITIVE);
    trigger = ioio_.openPwmOutput(triggerPin,16);


public void process(IOIO ioio_) throws ConnectionLostException, InterruptedException {

    distance = (echo.getDuration() * 1000 * 1000 ) / 29f / 2f;
    if (distance>2 && distance < 700){

Getting the sensor data example

public class FloorDistanceSensor implements FlyverMQConsumer {

float distance; 

/* Constants */
public static String TOPIC = "distance";
/* End of */

public LocationServicesSubsciber(){
    MainController.getInstance().getMessageQueue().registerConsumer(this, TOPIC);
public void dataReceived(FlyverMQMessage message) {
    distance = (Float) message.data;

IOIO OTG Outputs

  1. Add a new class under FlyverCore -> microcontrollers -> IOOIOutputs
  2. Extend the IOIOOutput class.
  3. Register pins under setup(). Details could be find under the IOIO OTG documentation
  4. Write your output data under the loop of process(). Details could be find under theIOIO OTG documentation
  5. Initialize output under FlyverCore -> BaseApp.java

Android USB Devices

Android naturally supports many USB devices which could be used. At this moment Flyver SDK does not have support for devices which are not supported by Android. Support of depth cameras, infrared cameras and more is expected.


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