Home Flower Intelligent Watering System Based On Raspberry Pi

Aiming at the problems of low security,low intelligence,high cost,network security vulnerability,poor performance in current irrigation system of family flowers,a security and reliable intelligent irrigation system of family flowers based on Raspberry Pi and Aliyun IoT platform is developed.In this research,DHT11 sensor,soil moisture sensor,HC-SRC04 sensor,Raspberry Pi and other hardware modules are used to realize the accurate collection of corresponding data,and Wi-Fi,MQTT(Message Queuing Telemetry Transport)protocol are applied to transmit the data to Aliyun IoT platform in real time.In the transmission process,SM2(elliptic curve public key cryptography)algorithm is used to encrypt the data,so as to achieve the security transmission of data.The information collected by sensors can be stored in Aliyun IoT platform and Raspberry Pi development board,at the same time,and the communication between IoT platform and user are realized.The application layer is divided into two parts as follows,remote monitoring and control backend and the alarm information real-time push backend.At the monitoring backend,users can obtain the environmental information about flower growth of the current status through the remote monitoring terminal APP,set the environmental parameters the most suitable for a certain kind of flower growth,set the minimum water level values of the container,complete the closed-loop control,conduct automatic monitoring of environmental factors and automatic adjustment of water content.Users can use the Dingtalk APP to monitor the water level status of the container in real time on the push APP,so as to avoid water shortage of irrigation.The test results show that all of the functions can work well.The range of soil moisture is controlled reasonably,and the flowers can grow healthily.In addition,the system has small transmission delay,strong stability and high security,which can satisfy the function of the automatic irrigation of family flowers.Last but not the least,the system has good adaptability and security in the unreliable network condition.