Hello, i am new here and i am new to arduino / mqtt and openhab.
I have an Arduino Mega with ethernet (ENC28J60), 1 x DHT 11 and a led strip attached on pin PWM 4. I found this sketch on internet that works fine for the DHT11, i already have the openhab + mqtt setup working.
The problem is with the led strip. When i start the arduino the led strip just goes on and off until the arduino crashes. I am not a programmer, i understand very little from the arduino sketch. I think that the problem are the push buttons (i do’nt need any push button but the sketch that i found already had this).
Is there any one out there who will be willing to share his sketch for a on / off switch (with dimming if possible) including mqtt ?
Here is the sketch that i found and works for my DHT11 but not for the led switch:
#include <SPI.h>
//#include <Ethernet.h>
#include <UIPEthernet.h>
#include <PubSubClient.h>
#include <DHT.h>
const int butt1 = 3;// the pin that the pushbutton is attached to
const int butt2 = 2;
const int ledPin1 = 5;
const int ledPin2 = 4;
int ledState1 = HIGH;
int buttonState1;
int lastButtonState1 = LOW;
int ledState2 = HIGH;
int buttonState2;
int lastButtonState2 = LOW;
long previousMillis = 0;
unsigned long currentMillis = 0;
long interval = 60000; // READING INTERVAL
int t = 0; // TEMPERATURE VAR
int h = 0; // HUMIDITY VAR
#define DHTPIN 24 // SENSOR PIN
#define DHTTYPE DHT11 // SENSOR TYPE - THE ADAFRUIT LIBRARY OFFERS SUPPORT FOR MORE MODELS
DHT dht(DHTPIN, DHTTYPE);
// Update these with values suitable for your network.
byte mac[] = { 0xDE, 0xED, 0xBA, 0xFE, 0xFE, 0xEF };
IPAddress ip(192, 168, 1, 103);
IPAddress server(192, 168, 1, 210);
void callback(char* topic, byte* payload, unsigned int length);
EthernetClient ethClient;
PubSubClient client(server, 1883, callback, ethClient);
void callback(char* topic, byte* payload, unsigned int length) {
Serial.println();
Serial.println("Callback");
Serial.print("Topic = ");
Serial.println(topic);
Serial.print("Payload = ");
for (int i=0;i<length;i++){
Serial.print((char)payload[i]);
}
Serial.println();
if (strcmp(topic,"/arduino/l1/com")==0) {
if (payload[0] == 'OFF')
{
digitalWrite(ledPin1, LOW);
delay(100);
client.publish("/arduino/l1/state","OFF");
}
else if (payload[0] == 'ON')
{
digitalWrite(ledPin1, HIGH);
delay(100);
client.publish("/arduino/l1/state","ON");
}
}
if (strcmp(topic,"/arduino/l2/com")==0) {
if (payload[0] == 'OFF')
{
digitalWrite(ledPin2, LOW);
delay(100);
client.publish("/arduino/l2/state","OFF");
}
else if (payload[0] == 'ON')
{
digitalWrite(ledPin2, HIGH);
delay(100);
client.publish("/arduino/l2/state","ON");
}
}
}
void reconnect() {
// Loop until we're reconnected
while (!client.connected()) {
Serial.print("Attempting MQTT connection...");
// Attempt to connect
if (client.connect("arduinoClient")) {
Serial.println("connected");
client.subscribe("/arduino/#");
client.publish("conn","Connected");
} else {
Serial.print("failed, rc=");
Serial.print(client.state());
Serial.println(" try again in 5 seconds");
// Wait 5 seconds before retrying
delay(5000);
}
}
}
void push1() {
int reading1 = digitalRead(butt1);
buttonState1 = reading1;
if (buttonState1 == HIGH) {
ledState1 = !ledState1;
if (ledState1 < 1)
{
digitalWrite(ledPin1, LOW);
delay(100);
client.publish("/arduino/l1/com","OFF");
client.publish("/arduino/l1/state","OFF");
}
else
{
digitalWrite(ledPin1, HIGH);
delay(100);
client.publish("/arduino/l1/com","ON");
client.publish("/arduino/l1/state","ON");
}
}
}
void push2() {
int reading2 = digitalRead(butt2);
buttonState2 = reading2;
if (buttonState2 == HIGH) {
ledState2 = !ledState2;
if (ledState2 < 1)
{
digitalWrite(ledPin2, LOW);
delay(100);
client.publish("/arduino/l2/com","OFF");
client.publish("/arduino/l2/state","OFF");
}
else
{
digitalWrite(ledPin2, HIGH);
delay(100);
client.publish("/arduino/l2/com","ON");
client.publish("/arduino/l2/state","ON");
}
}
}
void temp() {
h = (int)dht.readHumidity();
t = (int)dht.readTemperature();
char temp[2];
char hum[3];
sprintf(hum, "%d", h);
sprintf(temp, "%d", t);
client.publish("/arduino/temp/state", temp);
client.publish("/arduino/hum/state", hum);
}
void setup() {
// put your setup code here, to run once:
pinMode(butt1, INPUT);
pinMode(butt2, INPUT);
// initialize the LED as an output:
pinMode(ledPin1, OUTPUT);
pinMode(ledPin2, OUTPUT);
Serial.begin(9600);
Ethernet.begin(mac, ip);
digitalWrite(ledPin1, LOW);
digitalWrite(ledPin2, LOW);
pinMode(26, OUTPUT); // sets the digital pin as output
pinMode(22, OUTPUT); // sets the digital pin as output
digitalWrite(26, HIGH); // sets +5v for the sensor
digitalWrite(22, LOW); // sets gnd for the sensor
h = (int)dht.readHumidity();
t = (int) dht.readTemperature();
if (client.connect("arduinoClient")) {
client.publish("conn","Connected");
client.subscribe("/arduino/#");
}
}
void loop() {
// put your main code here, to run repeatedly:
if (!client.connected()) {
reconnect();
}
currentMillis = millis();
if (currentMillis - previousMillis > interval) { // READ ONLY ONCE PER INTERVAL
previousMillis = currentMillis;
temp();
}
int reading1 = digitalRead(butt1);
int reading2 = digitalRead(butt2);
if (reading1 != buttonState1) {
push1();
}
if (reading2 != buttonState2){
push2();
}
client.loop();
}
