This Micro-controller controlled geomagnetic magnetic field measurement device uses a triaxial sensor based Anisotropic Magneto Resistance (AMR) effect, and can measure magnetic field values with all three axes, namely X, Y, and Z. This device consists of HMC5883L sensor, nodeMCU with ESP8266 wifi module and LCD display. It can also update the measurement data to google sheets for remote access and analysis.