DRY - don't repeat yourself
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@ -4,6 +4,8 @@ Required libraries (Tools -> manage libraries)
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- PubSubClient@2.8.0
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- Wifi
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*/
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#include <stdlib.h>
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#include <string.h>
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#include "EmonLib.h"
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#include <WiFi.h>
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#include <PubSubClient.h>
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@ -19,6 +21,7 @@ const char* ssid = secrect_ssid;
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const char* password = secret_password;
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const char* mqttServer = mqtt_server;
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const int mqttPort = mqtt_port;
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const char* mqttPrefix = mqtt_prefix;
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// wifi and MQTT
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WiFiClient wifiClient;
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@ -67,7 +70,7 @@ void reconnect() {
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if (client.connect(clientId.c_str())) {
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Serial.println("connected");
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//Once connected, publish an announcement...
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client.publish("/iot-platform/engergy-montitor/test-device/status", "online");
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client.publish(concat(mqttPrefix, "/status"), "online");
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// ... and resubscribe
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} else {
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Serial.print("failed, rc=");
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@ -79,31 +82,35 @@ void reconnect() {
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}
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}
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char* concat(const char* str1, const char* str2) {
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char* result;
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asprintf(&result, "%s%s", str1, str2);
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return result;
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}
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void loop() {
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// get values
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double irms = emon1.calcIrms(1480);
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double power = irms * voltage;
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// debug, print out on serial
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Serial.print(power);
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Serial.print(" Watt - ");
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Serial.print(irms);
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Serial.println(" Ampere");
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// convert double to char array for MQTT
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char powerArray[10];
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snprintf(powerArray, 10, "%f", power);
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char irmsArray[10];
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snprintf(irmsArray, 10, "%f", irms);
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printf("%s", irmsArray);
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// publish values
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client.publish("/iot-platform/engergy-montitor/test-device/watt", powerArray);
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client.publish("/iot-platform/engergy-montitor/test-device/ampere", irmsArray);
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client.publish(concat(mqttPrefix, "/watt"), powerArray);
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client.publish(concat(mqttPrefix, "/ampere"), irmsArray);
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// wait a second
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delay(1000);
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}
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@ -3,3 +3,4 @@
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#define secret_password "guestguest"
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#define mqtt_server "192.168.2.103"
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#define mqtt_port 1883
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#define mqtt_prefix "/iot-platform/engergy-montitor/test-device"
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