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Topic: Inconsistent Sensor Readings with PIC16F877A and DHT22 (Read 816 times) previous topic - next topic
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Inconsistent Sensor Readings with PIC16F877A and DHT22

I'm working on a project with a PIC16F877A microcontroller and a DHT22 sensor, but I'm getting inconsistent readings. Here are the details:

Setup:
Microcontroller: PIC16F877A
Sensor: DHT22
Connections:
VCC to 5V
GND to Ground
Data to RA0 (10k pull-up resistor)
Code:
c

#include <xc.h>
#define _XTAL_FREQ 20000000

// Configurations
#pragma config FOSC = HS, WDTE = OFF, PWRTE = ON, BOREN = ON, LVP = OFF, CPD = OFF, WRT = OFF, CP = OFF

void init() {
    TRISA = 0x01;
    ADCON1 = 0x07;
}

void read_sensor() {
    // Reading logic
}

void main() {
    init();
    while(1) {
        read_sensor();
        __delay_ms(2000);
    }
}
Issue:
Readings fluctuate significantly.
No correlation with actual conditions.
Stable power supply and secure connections.
Help Needed:
Has anyone experienced this? Any advice on resolving these fluctuations?



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