Development of Wireless Magnetic Field Sensor Node Based on Programmable System on Chip Microcontroller

Abstract

Wireless magnetic field sensor node is a magnetic field sensor that is integrated with microprocessor, wireless communicationsystem, and a small voltage source. That architecture makes it has improvement capability and functionality in order makingsensing process. Magnetic field sensor plays a very important part in many application and embedded system. In a wide rangeof embedded and wireless sensor application, combining a magnetic filed sensor with programmable system on chipmicrocontroller and wireless system will build a wireless sensor node. Thus that configuration technology inside offer anattractive and low-cost alternative for many intelligent system applications. This paper presents development of wirelessmagnetic field sensor node prototype. The node prototype built with the low power and a low noise magnetic field sensorbased on the Anisotropic MagnetoResistive (AMR) effect, the Programmable Single on Chip (PSoC), a 2,4 GHz radiofrequency as wireless communication, and 2 AAA batteries as 3.3 V DC voltage source. Comparing with a conventionalimplementation, it is smaller and has lower power and costs. Integration of PSoC microcontroller technology in this designallows the developer to rapidly create solutions for any wireless applications, and has unique capabilities that are not presentwhen designing with other microcontrollers. The simple experiment result show that designed wireless magnetic filed sensornode can acquire experiment data (magnetic fileds), and send data processing to the computer monitor over radio frequencycommunication. Another important aspect is related to the decrease in energy consumption due to the use of fewer and lowpowerconsumption components.