Interfacing the Mini Reed sensor with Bharat PI board

 

INTERFACING MINI REED SENSOR USING BHARATHPI

 

Introduction of BHARATPI:

A single board architecture with compute, network and storage designed to build any IoT idea into a product. The board comes with a ESP32 Wroom 4MB memory + WiFi + Bluetooth + SD card slot. You can program the board using Arduino IDE or microPython. All ESP programs are compatible with Bharat Pi boards.

Introduction of Mini Reed Sensor:

The KY-021 Magnetic Reed Switch module is a switch that is normally open and gets closed when exposed to a magnetic field, sending a digital signal. Commonly used in mechanical systems as proximity sensors.

Compatible with Barathpi,Arduino, Raspberry Pi, ESP32 and other microcontrollers.

STEP 1:How Mini Reed Sensor Works?

 

In a presence of a magnetic field, the two contacts of a reed switch act as opposite magnetic poles. Therefore they attract each other and join together. When the magnetic field is not present, the contacts return back to their initial positions. In that state, a reed switch is said to be open. It does not conduct electricity during that phase. However, in the presence of a magnetic field, the reed contacts join together and electricity flows through.

 

 

STEP 2: Mini Reed Sensor Pinout

·       Vcc - Connect to the 3.3v or 5v

·       Gnd - Connect to the gnd

·       Out – Any GPIO pin (pin 33)

 

STEP 3: Requirements

 

·       Mini Reed Sensor

·       Connecting wires

·       Bharathpi board

      Arduino IDE

 

 

STEP 4:Interfacing Mini Reed Sensor with Bharathpi

 

Step-by-Step Guide:

• Connect Mini Reed Sensor:
• The Mini Reed Sensor typically has three pins: VCC (Power), GND (Ground), and OUT (Output).
• Connect the VCC pin of the Mini Reed Sensor to a 5V output on the Arduino.
• Connect the GND pin of the Mini Reed Sensor to the GND (Ground) on the Arduino.
• Connect the OUT (Output) pin of the Mini Reed Sensor to one of the digital pins on the Arduino .
• Connect Bharat Pi Board:The Bharat Pi board should be connected to the Arduino through the GPIO pins. Make sure to connect the necessary GPIO pins on the Bharat Pi board to the corresponding pins on the Arduino. This may vary depending on the specific board and pins available. Refer to the Bharat Pi board's documentation for pin mapping information.
• You'll need to write Arduino code to read the state of the Mini Reed Sensor and send the information to the Bharat Pi board.
• Upload the Arduino code to your Arduino board using the Arduino IDE.
• Testing:
• After uploading the code, test the setup by placing a magnet near the Mini Reed Sensor. The sensor's state should change (usually from HIGH to LOW) when a magnet is close, and this change should be reflected on the Bharat Pi board.

 

STEP 5:Source Code and Programming

 

const int reedPin = 33; // Define the GPIO pin to which the Reed sensor is connected

 

void setup() {

  pinMode(reedPin, INPUT_PULLUP); // Set the pin as an input with a pull-up resistor

  Serial.begin(115200);

}

 

void loop() {

  int reedState = digitalRead(reedPin); // Read the state of the Reed sensor

 

  if (reedState == LOW) {

    // Reed sensor is triggered (magnet is near)

    Serial.println("Reed sensor triggered!");

  } else {

    // Reed sensor is not triggered (magnet is away)

    Serial.println("Reed sensor not triggered.");

  }

 

  delay(1000); // Add a delay to avoid rapid readings

}

 

GitHub link:https://github.com/PuneeethG/Sensor-Interfacing/blob/main/minireed/minireed.ino

STEP 6:Application

Security Systems: Detecting unauthorized entry by monitoring doors and windows.

Industrial Automation: Monitoring the position of machinery components in manufacturing and assembly processes.

Home Automation: Integrating with smart home systems to monitor doors, windows, and garage doors.

Liquid Level Sensing: Measuring liquid levels in tanks or containers.

 

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