2.2inch Flex Sensor

2.2inch Flex Sensor Documentation

Overview

The 2.2inch Flex Sensor is a flexible potentiometer that changes its resistance value when bent or curved. It is commonly used in various IoT applications, such as gesture recognition, robotics, and wearable devices, to measure bending or displacement. This documentation provides a comprehensive guide on how to use the 2.2inch Flex Sensor with Arduino and Raspberry Pi platforms.

Technical Specifications

Operating Voltage: 5V
 Resistance Range: 10k - 30k
 Sensitivity: 1k/mm
 Flexibility: Up to 180 bend
 Dimensions: 2.2 inches (55mm) x 0.25 inches (6.3mm) x 0.01 inches (0.25mm)

Connecting the Flex Sensor

To connect the Flex Sensor to your microcontroller board, follow these steps:

1. Connect the VCC pin to a 5V power source.
2. Connect the GND pin to a ground pin on your microcontroller board.
3. Connect the SIG pin to an analog input pin on your microcontroller board.

Code Examples

### Example 1: Arduino - Read Flex Sensor Value

In this example, we will read the Flex Sensor value using an Arduino Uno board and display it on the serial monitor.
```c
const int flexPin = A0;  // Connect SIG pin to analog input A0

void setup() {
  Serial.begin(9600);
}

void loop() {
  int flexValue = analogRead(flexPin);
  flexValue = map(flexValue, 0, 1023, 0, 180);
  Serial.print("Flex Sensor Value: ");
  Serial.print(flexValue);
  Serial.println(" degrees");
  delay(50);
}
```
### Example 2: Raspberry Pi - Flex Sensor with Python

In this example, we will read the Flex Sensor value using a Raspberry Pi and Python, and display it on the console.
```python
import RPi.GPIO as GPIO
import time

GPIO.setmode(GPIO.BCM)

flex_pin = 17  # Connect SIG pin to GPIO 17

GPIO.setup(flex_pin, GPIO.IN)

while True:
    flex_value = GPIO.input(flex_pin)
    flex_angle = (flex_value / 1023)  180
    print("Flex Sensor Value: {:.2f} degrees".format(flex_angle))
    time.sleep(0.05)
```
### Example 3: Gesture Recognition using Flex Sensor and Arduino

In this example, we will use the Flex Sensor to recognize three different gestures: up, down, and neutral. We will use the Arduino Uno board and the `if-else` statement to determine the gesture based on the Flex Sensor value.
```c
const int flexPin = A0;  // Connect SIG pin to analog input A0

void setup() {
  Serial.begin(9600);
}

void loop() {
  int flexValue = analogRead(flexPin);
  if (flexValue < 300) {
    Serial.println("Gesture: Up");
  } else if (flexValue > 700) {
    Serial.println("Gesture: Down");
  } else {
    Serial.println("Gesture: Neutral");
  }
  delay(50);
}
```
Troubleshooting

Ensure that the Flex Sensor is properly connected to the microcontroller board.
 Use a multimeter to measure the resistance value of the Flex Sensor when bent or curved.
 Adjust the sensitivity of the Flex Sensor by adjusting the voltage supply or using a voltage divider circuit.

Conclusion

The 2.2inch Flex Sensor is a versatile component that can be used in a wide range of IoT applications. By following the examples and guidelines provided in this documentation, you can easily integrate the Flex Sensor into your projects and start measuring bending or displacement with ease.