[Resource Download] The download address is as follows:
https://docs.qq.com/doc/DTlRSd01BZXNpRUxl
Function description and design principle:
The design uses STM32F103C8T6 single-chip microcomputer as the main controller, using one serial port to collect formaldehyde sensor information, another serial port to send the formaldehyde information to the Bluetooth module, and the Bluetooth module to the mobile app for viewing. Then use a serial port to control the GSM module and send alarm messages.
An IO controls the triode switch, and then controls the buzzer and light-emitting LED, and performs sound and light alarm control.
Three buttons can be used to set the formaldehyde concentration alarm value, which are set, plus and minus buttons. The alarm value is stored in the internal flash of the microcontroller and will not be lost after power failure.
System composition = STM32F103C8T6 + GSM module + formaldehyde ZE08 module + serial port Bluetooth module + 0.96 inch OLED screen + buttons + buzzer + light-emitting diodes.
Information description:
The STM32 program is written in C language, compiled by Keil5 software, and the file is the project source code.
The circuit diagram is an AD format schematic diagram PCB project file, which is opened with altiumDesigner.
Tips:
This design has been verified in kind. The source files and source programs of the circuit diagram are successfully verified and usable. It can be said that it is a good material for learning the design and production of MCU! Hope this sharing is helpful to everyone!
