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--- en:iot:examples:pir [2018/02/27 14:37] – created Somepub
+++ en:iot:examples:pir [Unknown date] (current) – external edit (Unknown date) 127.0.0.1
@@ Line 1: / Line 1: @@
 ====== PIR example ======
+{{:en:iot:examples:pirmodule.png?200|}}
+Needed libraries:
+<code>lib_deps = ITTIoT</code>
+The code below will show if PIR detector detect any movement.
+<code c>
+/*
+ * IoT PIR example
+ *
+ * This example subscribe to the "pir" topic. When a message received, then it
+ * will switch the pir module "ON" and "OFF"
+ *
+ * Created 21 Febuary 2018 by Heiko Pikner and Mallor Kingsepp
+ */
+// Includes global variables and librarys that the PIR shield uses
+#include <Arduino.h>
+#include <ittiot.h>
+#define MODULE_TOPIC "ESP30/pir"
+#define WIFI_NAME "name"
+#define WIFI_PASSWORD "password"
+//Pin definition for the PIR (GPIO14)
+#define PIR_PIN D5
+//Pin definition for the PIR LED (GPIO16)
+#define PIR_LED_PIN D4
+// PIR state for detection
+bool pirState;
+// State that switches PIR on and off
+bool onState;
+// If message received for PIR topic. For example:
+// mosquitto_pub -u test -P test -t "ITT/IOT/3/pir" -m "1"
+void iot_received(String topic, String msg)
+{
+  Serial.print("MSG FROM USER callback, topic: ");
+  Serial.print(topic);
+  Serial.print(" payload: ");
+  Serial.println(msg);
+  if(topic == MODULE_TOPIC)
+  {
+    // Switching the PIR shield on or off, depending what message is received
+    if(msg == "1")
+    {
+  	   onState = true;
+    }
+    if(msg == "0")
+    {
+  	   onState = false;
+    }
+  }
+}
+// Function started after the connection to the server is established.
+void iot_connected()
+{
+  Serial.println("MQTT connected callback");
+  // Subscribe to the topic "pir"
+  iot.subscribe(MODULE_TOPIC);
+  iot.log("IoT PIR example!");
+}
+void setup()
+{
+  Serial.begin(115200); // setting up serial connection parameter
+  Serial.println("Booting");
+  //iot.setConfig("wname", WIFI_NAME);
+  //iot.setConfig("wpass", WIFI_PASSWORD);
+  iot.printConfig(); // Print json config to serial
+  iot.setup(); // Initialize IoT library
+  // Initialize PIR pin
+  pinMode(PIR_PIN, INPUT);
+  pinMode(PIR_LED_PIN, OUTPUT);
+}
+void loop()
+{
+  iot.handle(); // IoT behind the plan work, it should be periodically called
+  delay(200); // Wait 0.2 seconds
+  if(onState == true){
+    // This part of the code is executed, when PIR shield is active
+    if(digitalRead(PIR_PIN))
+    {
+      if(pirState == false)
+      {
+        // When PIR has detected motion, then the LED is switched on and text “Motion detected!” is published to the MQTT broker
+        digitalWrite(PIR_LED_PIN, HIGH);
+        String msg = String("Motion detected!");
+        iot.publishMsg("pir", msg.c_str());
+        //Serial.println(msg);
+        pirState = true;
+      }
+    }
+    else
+    {
+      if(pirState == true)
+      {
+        // PIR shields LED is switched off, when it is not detecting any motion
+        digitalWrite(PIR_LED_PIN, LOW);
+        pirState = false;
+      }
+    }
+  }
+  else{
+    // When the PIR shield has been switched off, then its offline state is sent to the MQTT broker
+    iot.log("PIR offline");
+    delay(2000); // Waiting 2 secondes
+  }
+}
+</code>

en/iot/examples/pir.1519742247.txt.gz · Last modified: 2020/07/20 09:00 (external edit)