Design of an environmental monitor based on STM32 microcontroller

With the increasingly serious environmental problems, more and more environmental monitors equipped with multiple sensors are being developed. This paper reports an environment monitor that uses multiple sensors. It is based on a stm32f103 microcontroller unit (MCU) as the core, using a highly efficient design. The use of both Beidou navigation and Global Positioning System (GPS) can help improve the precise of the geographic information, with the temperature sensor, humidity sensor, noise sensor, Dust and other sensors to get multi-functional environmental parameters. These parameters can be read on a Liquid Crystal Display (LCD) and this product also supports linking with the phone, the data can be transferred to the phone via the General Packet Radio Service (GPRS) module. The author also tries to make it more portable, so it uses a battery to power it. It also adopts a modular design. Users can add or decrease any module for various goals. It also has a phone Application (APP) that can transfer text messages that contain all parameters, they are sent by the GPRS module to the phone app, in this app it invokes map Application Programming Interface (API), so parameters are shown on the map. After the test, results show that the system has good environmental monitoring capability. With good testing accuracy and robustness, it can fulfill the requirements of the design.