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--- en:iot-open:remotelab:itt:servo [2018/12/06 06:31] – rim.puks
+++ en:iot-open:remotelab:itt:servo [2020/07/20 09:00] (current) – external edit 127.0.0.1
@@ Line 1: / Line 1: @@
-===== Servo module =====
+===== ITT Servo module =====
 This laboratory is located in the office of ITT Group in Tallinn, Estonia.
@@ Line 41: / Line 41: @@
 ==== Hands-on labs ====
-//List study scenarios (hands-on labs), linking to the Dokuwiki pages with hands-on labs descriptions (there should be a separate page for each scenario). Classify each scenario and refer to the target group using starting keywords:
-  * Beginners
+=== Example code ===
-  * Undergraduates
-  * Masters
+<code c>
-  * Professionals
+/*
-Note, assume that more professional group automatically contains less professional ones. Note - use language and as appropriate to the target group, i.e.://
+ * IoT Servo example
-<code>
+ *
-  * Beginners: Elementary operations on the Arduino 2x16 LCD screen.
+ * This example subscribe to the "servo" topic. When a message received, then it
-  * Undergraduates: Visualizing temperature and humidity on the remote screen.
+ * change servo position
-  * Masters: Using power saving states to limit power consumption.
+ *
+ * Created 11 Sept 2017 by Heiko Pikner
+ */
+#include <Arduino.h>
+#include <Servo.h>
+#include <ittiot.h>
+//Pin definition for the Servo (D3)
+#define SERVO_PIN            D3
+Servo myservo;  // create servo object to control a servo
+// Change the servo position (value between 0 and 180)
+// mosquitto_pub -u test -P test -t "RL/esp-{ESP-ID}/servo" -m "51"
+// = this calls servo motor to change position
+void iot_received(String topic, String msg)
+{
+  Serial.print("MSG FROM USER callback, topic: ");
+  Serial.print(topic);
+  Serial.print(" payload: ");
+  Serial.println(msg);
+  Serial.print("Servo: ");
+  Serial.println(msg);
+  myservo.write(msg.toInt());
+}
+// Function started after the connection to the server is established
+void iot_connected()
+{
+  Serial.println("MQTT connected callback");
+  // Subscribe to the topic "servo"
+  iot.subscribe("servo");
+  iot.log("IoT Servo example!");
+}
+void setup()
+{
+  Serial.begin(115200);
+  Serial.println("Booting");
+  // Print json config to serial
+  iot.printConfig();
+  // Initialize IoT library
+  iot.setup();
+  myservo.attach(SERVO_PIN);
+}
+void loop()
+{
+  // IoT behind the plan work, it should be periodically called
+  iot.handle();
+  delay(200);
+}
 </code>
 ==== Support ====
-//Give some information on how to access help, how to get support in case of the trouble etc.//
+info@ittgroup.ee

en/iot-open/remotelab/itt/servo.1544077899.txt.gz · Last modified: 2020/07/20 09:00 (external edit)