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--- en:iot:examples:current [2017/12/18 13:05] – New picture tomykalm
+++ en:iot:examples:current [Unknown date] (current) – external edit (Unknown date) 127.0.0.1
@@ Line 1: / Line 1: @@
+====== Current example======
+The current sensor device has to be connected to the sensor module. Current sensor device has a 3,5 mm plug what has to be connected to the sensor module left jacket A. The controller and sensor modules must be connected.
+The current sensor has to be 30A
+{{:en:iot:examples:currentpicture1.jpg?200|}}
+Needed libraries:
+<code>lib_deps = ITTIoT, EmonLib</code>
+The example code above shows the alternating current value to current topic "curr". If nothing is measured the current value is NaN.
+<code c>
+#include <Arduino.h>
+#include <ittiot.h>
+#include "EmonLib.h"
+#include <Ticker.h>
+#define WIFI_NAME "name"
+#define WIFI_PASSWORD "password"
+// Pin definition for the current sensor
+#define ADC_PIN A0
+// create a objects
+EnergyMonitor emon1;
+Ticker adcTicker;
+bool adcFlag;
+uint16_t adcSampleCount;
+void setAdcFlag()
+{
+    // If time, the set adcFlag.
+    adcFlag = true;
+}
+// Function started after the connection to the server is established.
+void iot_connected()
+{
+    Serial.println("MQTT connected callback");
+    iot.log("IoT current example!");
+}
+void setup()
+{
+    // setting up serial connection parameter
+    Serial.begin(115200);
+    Serial.println("Booting");
+    //iot.setConfig("wname", WIFI_NAME);
+    //iot.setConfig("wpass", WIFI_PASSWORD);
+    // print json config to serial
+    iot.printConfig();
+    // Initialize IoT library
+    iot.setup();
+    // Current: input pin, calibration (how big current can it read).
+    emon1.current(ADC_PIN, 30);
+    adcSampleCount = 1500;
+    // Start function setAdcFlag 0.5 second interval
+    adcTicker.attach(0.5, setAdcFlag);
+}
+void loop()
+{
+  // IoT behind the plan work, it should be periodically called
+  iot.handle();
+  // If adcFlag is set, then send information to server
+  if(adcFlag)
+  {
+      adcFlag = false;
+      double val = emon1.calcIrms(adcSampleCount);
+      String msg = String(val);
+      // publishing measured current value to a MQTT broker
+      iot.publishMsg("curr", msg.c_str());
+      // sending measured current value to a computer
+      Serial.println(msg);
+  }
+}
+</code>