Saving a text send by the hc-05 using arduino nano to record in mobile app for bad posture

[John_Denver_Cruz]

// Define pins
const int flexSensorPin = A0;  // Analog pin for the flex sensor
const int motorPin = 9;        // Digital pin for the vibration motor

// Variables
int flexValue = 0;              // Variable to store flex sensor value
int sensitivityThreshold = 300; // Threshold to activate the motor
unsigned long lastSendTime = 0; // Last time a message was sent
const unsigned long sendInterval = 60000; // 1 minute interval in milliseconds

void setup() {
    // Initialize Serial for Bluetooth communication and debugging
    Serial.begin(9600);

    // Set pin modes
    pinMode(flexSensorPin, INPUT);    // Flex sensor as input
    pinMode(motorPin, OUTPUT);        // Motor as output
}

void loop() {
    // Read the flex sensor value
    flexValue = analogRead(flexSensorPin);
    
    // Print the flex sensor value to the Serial Monitor for debugging
    Serial.print("Flex Sensor Value: ");
    Serial.println(flexValue);

    // Check if the flex sensor value exceeds the threshold
    if (flexValue >= sensitivityThreshold) {
        // Turn ON the vibration motor
        digitalWrite(motorPin, HIGH);
        Serial.println("Vibration Motor ON");

        // Check if it’s time to send a Bluetooth notification
        unsigned long currentTime = millis();
        if (currentTime - lastSendTime >= sendInterval) {
            // Send "Bad posture detected" message over Bluetooth
            Serial.println("Bad posture detected");
            lastSendTime = currentTime;  // Update the last send time
        }
    } else {
        // Turn OFF the vibration motor
        digitalWrite(motorPin, LOW);
        Serial.println("Vibration Motor OFF");
    }

    // Small delay for stability
    delay(500);
}

[ABG]

Here is a simple BlueTooth text receiver sample, for single value per line:

...

You need a Clock from the Sensors Drawer.