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- #include <ESP8266WiFi.h>
- #include <PubSubClient.h>
-
- //Eigene zu trackende Entfernung festlegen
- #define DISTANCE 15
-
- const char* SSID = "smartroom";
- const char* PSK = "smarthome";
- const char* MQTT_BROKER = "192.168.4.1";
- WiFiClient espClient;
- PubSubClient client(espClient);
-
- // defines pins numbers
- const int trigPin = 2; //D4
- const int echoPin = 0; //D3
-
- long duration;
- int distance;
- int bool1 = 0;
- char msg[50];
- int value = 0;
- long lastMsg = 0;
-
- void setup() {
- pinMode(trigPin, OUTPUT); // Sets the trigPin as an Output
- pinMode(echoPin, INPUT); // Sets the echoPin as an Input
-
- Serial.begin(115200);
- setup_wifi();
- client.setServer(MQTT_BROKER, 1883);
- }
-
- void setup_wifi() {
- delay(10);
- Serial.println();
- Serial.print("Connecting to ");
- Serial.println(SSID);
- WiFi.mode(WIFI_STA);
- WiFi.begin(SSID, PSK);
-
- while (WiFi.status() != WL_CONNECTED) {
- delay(500);
- Serial.print(".");
- }
-
- Serial.println("");
- Serial.println("WiFi connected");
- Serial.println("IP address: ");
- Serial.println(WiFi.localIP());
- }
-
- void reconnect() {
- while (!client.connected()) {
- Serial.print("Reconnecting...");
- if (!client.connect("ESP8266Client")) {
- Serial.print("failed, rc=");
- Serial.print(client.state());
- Serial.println(" retrying in 5 seconds");
- delay(5000);
- }
- }
- }
-
-
- void loop() {
-
- if (!client.connected()) {
- reconnect();
- }
- client.loop();
-
- // Clears the trigPin
- digitalWrite(trigPin, LOW);
- delayMicroseconds(2);
-
- // Sets the trigPin on HIGH state for 10 micro seconds
- digitalWrite(trigPin, HIGH);
- delayMicroseconds(10);
- digitalWrite(trigPin, LOW);
-
- // Reads the echoPin, returns the sound wave travel time in microseconds
- duration = pulseIn(echoPin, HIGH);
-
- // Calculating the distance
- distance = duration * 0.034 / 2;
- // Prints the distance on the Serial Monitor
- /* if ((distance != (distance_alt - 1)) && (distance != (distance_alt)) && (distance != (distance_alt + 1))) { //+-1 um störungen herauszufiltern
- snprintf (msg, 50, "%d", distance);
- Serial.print("Publish Motion: ");
- Serial.println(msg);
- client.publish("/home/data", msg);
- delay(200);
- } */
- if (bool1 == 0) {
- //alternativ: if ((distance != (DISTANCE - 1)) && (distance != (DISTANCE)) && (distance != (DISTANCE + 1))) { //+-1
- if (((DISTANCE + 2) < distance) || ((DISTANCE - 2) > distance)) { //darf +- 2 um festgelegte entfernung schwanken, um störungen herauszufiltern
- //Meldung an PI, dass die Distanz gestört ist
- snprintf (msg, 50, "%d", 1);
- client.publish("/home/data", msg);
- //Serieller Monitor
- Serial.print("Motion detected! Distance: ");
- Serial.println(msg);
-
- //Flag auf 1
- bool1 = 1;
-
- }
- }
- else if (bool1 == 1) {
- if (((DISTANCE + 2) < distance) || ((DISTANCE - 2) > distance)) { //darf +- 2 um festgelegte entfernung schwanken, um störungen herauszufiltern
- Serial.print("Still motion detected! Distance: ");
- Serial.println(distance);
- }
- else {
- //Meldung an PI, dass die Ausgangsdistanz wieder gemessen wird
- snprintf (msg, 50, "%d", 0);
- client.publish("/home/data", msg);
-
- //Flag wieder auf 0
- bool1 = 0;
-
- }
- }
- delay(100);
- }
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