95 lines
2.1 KiB
C++
95 lines
2.1 KiB
C++
#include <ESP8266WiFi.h>
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#include <PubSubClient.h>
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const char* SSID = "smartroom";
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const char* PSK = "smarthome";
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const char* MQTT_BROKER = "192.168.4.1";
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WiFiClient espClient;
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PubSubClient client(espClient);
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// defines pins numbers
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const int trigPin = D4; //D4
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const int echoPin = D3; //D3
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long duration;
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int distance;
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int distance_alt=0;
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char msg[50];
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int value = 0;
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long lastMsg = 0;
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void setup() {
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pinMode(trigPin, OUTPUT); // Sets the trigPin as an Output
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pinMode(echoPin, INPUT); // Sets the echoPin as an Input
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Serial.begin(115200);
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setup_wifi();
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client.setServer(MQTT_BROKER, 1883);
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}
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void setup_wifi() {
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delay(10);
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Serial.println();
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Serial.print("Connecting to ");
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Serial.println(SSID);
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WiFi.mode(WIFI_STA);
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WiFi.begin(SSID, PSK);
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while (WiFi.status() != WL_CONNECTED) {
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delay(500);
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Serial.print(".");
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}
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Serial.println("");
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Serial.println("WiFi connected");
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Serial.println("IP address: ");
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Serial.println(WiFi.localIP());
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}
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void reconnect() {
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while (!client.connected()) {
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Serial.print("Reconnecting...");
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if (!client.connect("ESP8266Client")) {
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Serial.print("failed, rc=");
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Serial.print(client.state());
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Serial.println(" retrying in 5 seconds");
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delay(5000);
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}
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}
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}
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void loop() {
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if (!client.connected()) {
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reconnect();
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}
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client.loop();
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// Clears the trigPin
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digitalWrite(trigPin, LOW);
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delayMicroseconds(2);
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// Sets the trigPin on HIGH state for 10 micro seconds
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digitalWrite(trigPin, HIGH);
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delayMicroseconds(10);
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digitalWrite(trigPin, LOW);
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// Reads the echoPin, returns the sound wave travel time in microseconds
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duration = pulseIn(echoPin, HIGH);
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// Calculating the distance
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distance = duration * 0.034 / 2;
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// Prints the distance on the Serial Monitor
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if((distance!=(distance_alt-1))&&(distance!=(distance_alt))&&(distance!=(distance_alt+1))){//+-1 um störungen herauszufiltern
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snprintf (msg,50,"%d", distance);
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Serial.print("Publish Motion: ");
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Serial.println(msg);
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client.publish("/home/data", msg);
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delay(200);
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}
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distance_alt=distance;
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}
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