update Code

libraries/MQTT_Client/examples/PublishLightAndDark/PublishLightAndDark.ino

@@ -0,0 +1,123 @@
+/*
+ * Make the builtin LED blink, but only when it's dark. Publish light or dark condition to a
+ * MQTT topic.
+ *
+ * Connect an analog light sensor with the Arduino: GND to GND,
+ * VCC to VCC, SIG to A1.
+ *
+ * Copyright (C) 2018 Andreas Motzek andreas-motzek@t-online.de
+ *
+ * You can use, redistribute and/or modify this file under the terms of the Modified Artistic License.
+ * See http://simplysomethings.de/open+source/modified+artistic+license.html for details.
+ *
+ * This file is distributed in the hope that it will be useful, but without any warranty; without even
+ * the implied warranty of merchantability or fitness for a particular purpose.
+ */
+
+#include <Client.h>
+#include <WiFi101.h>
+#include <CooperativeMultitasking.h>
+#include <MQTTClient.h>
+
+char ssid[] = "... WLAN SSID ...";
+char pass[] = "... WLAN password ...";
+char host[] = "... MQTT broker host name ...";
+char clientid[] = "... MQTT client id ...";
+char username[] = "... MQTT user name ...";
+char password[] = "... MQTT password ...";
+char topicname[] = "... MQTT topic name ....";
+
+CooperativeMultitasking tasks;
+Continuation beginWiFiIfNeeded;
+Continuation connectMQTTClientIfNeeded;
+Continuation light;
+Continuation dark;
+Guard isDark;
+Continuation on;
+Continuation off;
+Guard isLight;
+
+WiFiClient wificlient;
+MQTTClient mqttclient(&tasks, &wificlient, host, 1883, clientid, username, password);
+MQTTTopic topic(&mqttclient, topicname);
+
+void setup() {
+  Serial.begin(9600);
+  //
+  while (!Serial) {
+    delay(1000);
+  }
+  //
+  Serial.println("begin wifi");
+  //
+  WiFi.begin(ssid, pass);
+  tasks.after(10000, beginWiFiIfNeeded); // after 10 seconds call beginWiFiIfNeeded()
+  //
+  Serial.println("connect mqtt client");
+  //
+  mqttclient.connect();
+  tasks.after(15000, connectMQTTClientIfNeeded); // after 15 seconds call connectMQTTClientIfNeeded()
+  //
+  pinMode(LED_BUILTIN, OUTPUT);
+  tasks.now(light); // call light() now
+}
+
+void loop() {
+  tasks.run();
+}
+
+void light() {
+  topic.publish("\"light\"");
+  //
+  tasks.ifForThen(isDark, 5000, dark); // if isDark() for 5 seconds then call dark()
+}
+
+void dark() {
+  topic.publish("\"dark\"");
+  //
+  tasks.now(on); // call on() now
+}
+
+bool isDark() {
+  return analogRead(A1) < 300;
+}
+
+void on() {
+  digitalWrite(LED_BUILTIN, HIGH);
+  tasks.after(1000, off); // after 1 second call off()
+}
+
+void off() {
+  digitalWrite(LED_BUILTIN, LOW);
+  auto task1 = tasks.after(1000, on); // after 1 second call on()
+  auto task2 = tasks.ifForThen(isLight, 0, light); // if isLight() then call light()
+  tasks.onlyOneOf(task1, task2); // do either task1 or task2
+}
+
+bool isLight() {
+  return analogRead(A1) >= 400;
+}
+
+void beginWiFiIfNeeded() {
+  switch (WiFi.status()) {
+    case WL_IDLE_STATUS:
+    case WL_CONNECTED: tasks.after(30000, beginWiFiIfNeeded); return; // after 30 seconds call beginWiFiIfNeeded() again
+    case WL_NO_SHIELD: Serial.println("no wifi shield"); return; // do not check again
+    case WL_CONNECT_FAILED: Serial.println("wifi connect failed"); break;
+    case WL_CONNECTION_LOST: Serial.println("wifi connection lost"); break;
+    case WL_DISCONNECTED: Serial.println("wifi disconnected"); break;
+  }
+  //
+  WiFi.begin(ssid, pass);
+  tasks.after(10000, beginWiFiIfNeeded); // after 10 seconds call beginWiFiIfNeeded() again
+}
+
+void connectMQTTClientIfNeeded() {
+  if (!mqttclient.connected()) {
+    Serial.println("mqtt client not connected");
+    //
+    mqttclient.connect();
+  }
+  //
+  tasks.after(30000, connectMQTTClientIfNeeded); // after 30 seconds call connectMQTTClientIfNeeded() again
+}