Hello friends, I hope you all are doing great. Today, I am going to share the new HMC5883L / QMC5883L Compass Library for Proteus V1.0 . The GY-271 is the small blue compass module that you find in robots, rovers, drones and digital compass projects. It measures the Earth's magnetic field on three axes, and from two of them the Arduino works out the heading : how many degrees the board points away from north. There is a catch: GY-271 boards come with two different chips, the HMC5883L and the QMC5883L , and a sketch written for one does not work on the other. Now you can build and test both in Proteus. Behind the parts sit our own models , not parts that show a number. Each chip answers the Arduino exactly as its datasheet says, with its own address, its own registers and its own byte order ...