Hello,
I don’t have experience in photon with DTH22 (AM2320) devices. I am planning to setup photon with humidity and temparature sensor. fine. But its returing zero
Connection details
AM2320 -1 pin connected to VBAT
AM2320 -2 pin connected to D0 and 4.7ohm VBAT
AM2320 - 3 pin connected to GND
AM2320- 4 pin connected to D1 and 4.7ohm VBAT
I used AM2321.h file for implementation. Which is returning Temprature and humidity value as zero.
Code i used is below,
// This #include statement was automatically added by the Particle IDE.
#include <AM2321.h>
#include <application.h>
#include <Particle.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
AM2321 am2321;
char str[8];
unsigned long result = 0;
unsigned int temp, humi = 0;
unsigned int amID = 0;
String motion_detect;
int movement_detected = 0;
int publish_period = 5000; //Publish to console interval in ms
bool publish = 1;
double humidity = 0;
double tempf = 0;
//Initialize a timer to publish data to the console at an interval
Timer publishtimer(publish_period, publishToggle);
void setup() {
pinMode(D6, INPUT_PULLDOWN);
//Define a variable that's readable from a cURL (This is what gets published on the website)
Particle.variable("MotionK1", movement_detected);
Particle.variable("Humidity", humidity);
Particle.variable("Temprature", tempf);
publishtimer.start();
am2321.begin();
Serial.begin(9600);
}
void loop() {
if(digitalRead(D6)==1){
motion_detect = "Occupied";
}
else{
motion_detect = "Empty";
}
//Publish data to the console and update the particle.variable
if(publish){
Particle.publish("Room_K1", motion_detect, PRIVATE);
movement_detected = digitalRead(D6);
Particle.publish("Humidity",String(humidity),PRIVATE);
Particle.publish("Celsius",String(tempf),PRIVATE);
publish=0;
}
amID = am2321.readID();
result = am2321.readAll();
humi = result>>16;
temp = result&0xFFFF;
Serial.print("ID: ");
Serial.print(amID);
Serial.print(", Temp: ");
Serial.print(temp/10.0);
Serial.print(", Humi: ");
Serial.println(humi/10.0);
delay(2000);
}
void publishToggle(){
publish = 1;
}
