Outdoor solar automatic irrigation system

Background story: Once upon a time, TJR was a freshman in high school. The school was near a mountain and there was a large open space. One day, the leader had a sudden idea to engage in labor education and let TJR and his classmates grow vegetables. TJR saw that the ground was very dry and needed frequent watering, so he wanted to build an automatic irrigation system, so he came up with this project.

(1) Project details:

Function

1. Soil moisture is detected every 30 minutes. When the number of probes reaching the humidity threshold is greater than or equal to the minimum number of probes to start watering, the watering program is started.
2. Before watering, a sound will be played to warn people around you to stay away.
3. When the watering time reaches the length of a single watering, watering will automatically stop
4. If you stay on a non-main page (time page) for a long time without any operation, you will automatically switch to the main page.
5. If there is no operation for a long time, the digital tube will automatically turn off (press the menu button to wake up)

Time setting method

1. Before powering on, press and hold the setting button until the system self-test is completed (relays, etc. are turned off) and then let go.
2. Enter the hour setting page and press the plus key to increase the hour.
3. Press the setting key to enter the minute setting page, press the plus key to increase the minute
4. Press the Set button to enter the save page, and press the Add button to save the time setting.

(2) Describe the challenges faced by the project and the problems solved:

Problems encountered:

1. A servo was used to drive the ball valve, but during actual verification, it was found that if the system was powered off during watering, the water valve would not be able to be closed, resulting in an accident.
2. When the water valve opens automatically, someone is in the watering area and gets wet.
3. During the verification, only a single soil moisture probe was used, and it was found that part of the soil was dry, but only the area where the probe was located was wet, resulting in no watering solution:
4. Change the ball valve to an electric ball valve. When watering, if the system is powered off, the ball valve can still close automatically to avoid accidents.
5. Start the music module before watering to remind people around you to avoid it
6. Add additional soil moisture probes and place them as far apart as possible

(3) Describe the key points involved in the hardware and software parts of the project

1. Avoid watering at high temperatures such as noon and afternoon to avoid killing the plants.
2. Prevent the soil moisture probe from being corroded by electrolysis if it is inserted into the soil for a long time.
3. Starting from power saving, ensure that the system can work normally for 3 consecutive days without light.
4. Prevent rainwater from penetrating into the system and causing system short circuit failure.

(4) Project material list display

(5) Upload project pictures

(5.1) If the competition logo picture is printed on the PCB, it will be deemed as giving up the participation.

(5.2) Other pictures of the project

(6) Demonstrate your project and record it as a video for uploading

(6.1) Video upload contest official website (6.2) B station video title and link

Notes: ①: Video requirements: Please shoot horizontally, with a resolution of no less than 1280×720, format Mp4/Mov, and the size of a single video is limited to 100M; ②: Video upload: please upload to the official website of the competition and Station B simultaneously ( www .bilibili.com ), the top 10 most popular projects at Station B will receive 1,000-5,000 yuan in cash rewards, and other uploaded projects will receive 100 yuan Lichuang Mall no-threshold coupons; ③: Video title: The 5th Lichuang Electronic Design Competition: {Project Name }-{Video module name}; such as the 5th Lichuang Electronic Design Competition: "Autonomous Driving" project - team introduction.

(7) Whether it is released to the public for the first time

No (7.1) Whether the project has been published or won awards before, please indicate no (7.2) If the project is optimized on the original basis, please indicate that the optimization part is not

(8) Open source documents

Library files and source code downloads

(9) References

none

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