Hello everybody, I am Shafin, a member of Aiversity. I am going to share how to build a water level sensor with an Oled display for water tanks with a Raspberry pi. The OLED display will show the percentage of the bucket filled with water.
Materials:
- Raspberry Pi Model 3B
- Ultrasonic Sensor
- Oled Display (4 pins)
- Jumper Wires
- Buzzer
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Ultrasonic Sensor:
Ultrasonic Sensor is a sensor that can measure the distance between the sensor and the object using echolocation i.e the principle which bats use.
Buzzer:
A buzzer is a small component that gives out a sound wave when is switched on. We are going to use this to alert if our water tank is full
In addition to these, we will need a bucket and a jug
Oled Display:
OLED Display is a component that can display images and words clearly. I have used a 128 x 64 display.
In addition to this, we need:
A bucket
A water jug
Connections:
Ultrasonic sensor VCC to 5v of Raspberry Pi
Ultrasonic sensor Gnd to Gnd of Raspberry Pi
Trigger to GPIO 2
Echo to GPIO 3
Buzzer + to GPIO 4
Buzzer – to Gnd
Structure:
Structure
· Attach a scale to the bucket.
· Next attach the buzzer and ultrasonic sensor to the scale
Code:
Now you know the connections and the structure, let’s build the code.
1. Open the Thonny Python IDE
2. Download the Github code below or from the end of the page:
. Run the code
You will have to add your distance from the ultrasonic sensor to the base of the bucket on the line :
Line 25. dist_from_base = #Write the distance from the sensor to the base of the bucket
Testing
Fill water in the bucket. When the distance of the ultrasonic sensor from the water is around 4 centimeters, the buzzer will beep, alerting the bucket is almost full.
If you have any queries, please ask at hello.aiversity@gmail.com
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