To make the Pro Micro a mouse, you only need to include the head file 'mouse.h', which is already included in the Arduino Library. The heading angle and tilting angle is used to control the position of the cursor on the screen. Mpu.dmpGetYawPitchRoll(ypr, &q, &gravity) If the sensor works just fine, you can read and calculate the orientation information from DMP using the following code: mpu.dmpGetQuaternion(&q, fifoBuffer) Next, you need to declare a sensor object, and initialize the sensor and its DMP function: MPU6050 mpu Here we use MPU 6050's file: #include 'I2Cdev.h' To get this information, first you need to include the library file that defines the sensor class.

In this project, the orientation information is a direct output from MPU 9250's Digital Motion Processor (DMP), which is accurate enough for mouse application. The second is to make Pro Micro a mouse device and translate the motion information to control mouse cursor position on screen. One is to acquire motion measurement data from the IMU. The code essentially has 2 major functions. Move the bread, and push the left and right button to check its function.īefore we go, let us understand the code. Now, you have completed the air mouse development.

Open the code in Arduino and download the code to the Pro Micro. Next step, we will develop the code for the mouse.ĥ. At this moment, you have built the hardware. Use a micro USB cable to connect the Pro Micro to your computer. Therefore, when the button is not pushed, the signal detected by Pro Micro is low when the button is pushed, a high level signal is detected by Arduino Pro Micro. The other end of a button is connected to VCC. It is connected between GND and one end of a button, which is also connected to digital detection pin of Arduino Pro Micro (D9 and D10). For each button, a 10k Ohm resistor is used as a pull down resistor. Two buttons are used as left and right buttons of the mouse. There are 2 short white wires beneath the 9DOF IMU on breadboard (shown in Figure 1).

Pay attention to the SCL and SDA connection. Connect 4 corresponding pins from the Pro Micro and 10DOF IMU using copper wires on the breadboard, as shown in Figures 1 & 2. Solder a 6-pin connector to the 10DOF IMU (MPU9250+BMP280) and insert it into breadboard ģ. Solder a pair of 11-pin connectors onto the Arduino Pro Micro and insert it into the breadboard.Ģ.

Following the a step-by-step description of the schematic along with its realization on breadboard.ġ.

Arduino micro schematic