HMC5883L 3-Axis Compass Magnetometer Module GY-271
Price in Sri Lanka

GY-271 Compass Module is designed for low-field magnetic sensing with a digital interface and perfect to give precise heading information. This compact sensor fits into small projects such as UAVs and robot navigation systems. The chipset which is use in this module is HMC5883L The sensor converts any magnetic field to a differential voltage output on 3 axes. This voltage shift is the raw digital output value, which can then be used to calculate headings or sense magnetic fields coming from different directions.

Specifications:

• Name: HMC5883L module (three-axis magnetic field module).
• Use the chip: HMC5883L (Read the special note below on the usage of new IC QMC5883L)
• Power supply: 3-5V.
• Communication modes: I2C
• Measuring range: ±2mG to ±8G

Special note: Since the production of the IC HMC5883L had been discontinued by Honeywell in 2016, a more improved IC QMC5883L which is manufactured by QST Corp are mostly present on these modules unless the manufactures used an old stock. Some of the valuable details can be found in following articles.

Discontinuation notice: Honeywell HMC5883L Notice

Arduino library and guide: https://electropeak.com/learn/interfacing-gy-271-hmc5883l-compass-magnetometr-with-arduino/

Feature comparison: https://www.best-microcontroller-projects.com/hmc5883l.html