115 lines
2.8 KiB
C++
115 lines
2.8 KiB
C++
/*
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Required libraries (Tools -> manage libraries)
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- EmonLib@1.1.0
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- PubSubClient@2.8.0
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- WiFi.h - esp32 Wifi support
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*/
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#include <stdlib.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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#include "environment.h" // put your credentials and configuration in, here
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// sensor
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EnergyMonitor emon1;
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const byte current1Pin = A1; // ADC-PIN
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const byte voltage = 230; // Power voltage in Europe = 230 V
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// refrences from environment.h
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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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PubSubClient client(wifiClient);
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void setup() {
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Serial.begin(115200);
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Serial.setTimeout(500);
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setup_energy_sensor();
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setup_wifi();
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setup_mqtt();
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}
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void setup_energy_sensor() {
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analogReadResolution(ADC_BITS); // activate 12 Bit resolution for our ESP32
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emon1.current(current1Pin, 8); // Pin and Calibration
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}
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void setup_wifi() {
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delay(10);
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Serial.println();
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Serial.print("Connecting to ");
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Serial.println(ssid);
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WiFi.begin(ssid, password);
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while (WiFi.status() != WL_CONNECTED) {
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delay(500);
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Serial.print(".");
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}
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randomSeed(micros());
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Serial.println("");
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Serial.println("WiFi connected");
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Serial.println("IP address: ");
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Serial.println(WiFi.localIP());
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}
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void setup_mqtt() {
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client.setServer(mqttServer, mqttPort);
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// Loop until we're reconnected
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while (!client.connected()) {
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Serial.print("Attempting MQTT connection...");
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// Create a random client ID
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String clientId = "ESP32Client-";
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clientId += String(random(0xffff), HEX);
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// Attempt to connect
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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(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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Serial.print(client.state());
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Serial.println(" try again in 5 seconds");
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// Wait 5 seconds before retrying
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delay(5000);
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}
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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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// publish values
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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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} |