Bluetooth temperature and humidity monitoring system

Design of temperature and humidity monitoring system based on bluetooth communication

China is a large agricultural country, and agriculture has played an important role in national production since ancient times. As our country enters a new era, the rapid development of various industries in our country, especially the increasing input costs of the country in agriculture, has prompted the rapid transformation of our country from traditional agriculture to precision agriculture. Modern greenhouses have realized the monitoring of greenhouse environmental parameters through science and technology, better realized the control and use of greenhouses, and changed the current situation of relying on the sky for food in the past. Although the greenhouse technology has achieved rapid development, there are still some limitations in the monitoring of the greenhouse environment, which limits the long-term development of greenhouse agriculture in my country. Under such a background, the temperature, room temperature and humidity monitoring system based on Bluetooth communication is based on the research of the greenhouse monitoring system in line with my country's national conditions, and has certain research value and practical significance.

1. Overall scheme design of temperature, room temperature and humidity monitoring system

The main key components of the temperature, room temperature and humidity monitoring system based on Bluetooth communication include the following modules: temperature and humidity acquisition module, temperature and humidity display module, and Bluetooth communication transmission module. Next, we will focus on the selection and design of the functional scheme of this system.

(1) The selection of single-chip microcomputer as the core control system is one of the key points, considering its system design cost performance, work stability, ease of development and power consumption and other factors. Based on the above requirements, the system uses 51 series single-chip microcomputers as the hardware core, represented by STC89C52. This series of single-chip microcomputers has the advantages of low power consumption, dual DPTR, simple C language code writing, and strong versatility.

(2) The display module is the most direct communication window between man and machine. In order to display the status and operating status of the temperature, room temperature and humidity monitoring system in real time, the system is usually designed with a display module. The display modules usually used include LCD12864 display and LCD1602 display. Since the system does not need to display rich content, it only needs to display the temperature value, so the system chooses LCD1602 display.

2. Selection and design of the main control chip of the temperature and humidity monitoring system

The temperature, room temperature and humidity monitoring system based on Bluetooth communication adopts STC89C52 single-chip microcomputer. This single-chip microcomputer can not only meet the basic requirements, but also has a simple memory storage function, and the price is relatively cheap. Both can be used as I/O ports, either as output ports or input ports.

3. Selection and design of temperature and humidity sensor

DHT11 digital temperature and humidity sensor is a temperature and humidity composite sensor with calibrated digital signal output. It applies special digital module acquisition technology and temperature and humidity sensing technology, which has high reliability and excellent long-term stability.

4. LCD1602 display module design

In the single-chip microcomputer control system, LCD1602 is used to display temperature, upper limit value and lower limit value of temperature. The liquid crystal display module is a slow display device, so before executing each command, it must be confirmed that the busy flag of the module is low, indicating that it is not busy, otherwise the command will be invalid. When you want to display characters, you must first input the display character address, which is to tell the module where to display the characters.

5. Bluetooth communication module design

In order to be able to monitor the temperature and humidity of the greenhouse air in real time, the system uses the Bluetooth communication module to connect with the mobile phone, and can intuitively observe the corresponding values of dust and temperature and humidity in the air at any time and make decisions. The temperature, room temperature and humidity monitoring system based on Bluetooth communication uses the SPP-CA Bluetooth module, which supports the UART interface and the SPP Bluetooth serial port protocol. It has the advantages of low cost, small size, low power consumption, and high sensitivity for sending and receiving. A small number of peripheral components can achieve powerful functions.

Summarize

Due to the complexity of greenhouse environment monitoring, my country still has certain limitations in greenhouse environment monitoring. It is under this background that a temperature, room temperature and humidity monitoring system based on Bluetooth communication is designed. The system sends the measured values of temperature and humidity in the air in the greenhouse to the mobile phone APP through the Bluetooth communication module, which can monitor the temperature, room temperature and humidity in real time, and provide basic data for real-time control of temperature, room temperature and humidity and control of the greenhouse environment. significance. It has certain research value and practical significance.

The above are the design details of the temperature, room temperature and humidity monitoring system based on Bluetooth communication introduced by Shenzhen Zuchuang Microelectronics Co., Ltd. for you. If you have Bluetooth product design and development needs, you can trust us. We have rich experience in custom development of smart electronic products. We can evaluate the development cycle and IC price as soon as possible, and can also calculate the PCBA quotation. We are a number of chip agents at home and abroad: Songhan, Yingguang, Jieli, Ankai, Quanzhi, realtek, with MCU, voice IC, BLE Bluetooth IC, dual-mode Bluetooth module, wifi module. We have hardware design and software development capabilities. Covering circuit design, PCB design, single-chip microcomputer development, software custom development, APP custom development, WeChat official account development, voice recognition technology, Bluetooth development, wifi technology, etc. It can also undertake the research and development of smart electronic products, the design of household appliances, the development of beauty equipment, the development of Internet of Things applications, the design of smart home solutions, the development of TWS earphones, the development of Bluetooth earphone speakers, the development of children's toys, and the research and development of electronic education products.