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mschaeublemschaeuble
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‎.gitignore

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arduino_secrets.h

‎arduino_secrets.h.example

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#define SECRET_WIFI_SSID ""
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#define SECRET_WIFI_PASSWORD ""
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#define SECRET_MQTT_SERVER ""
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#define SECRET_MQTT_USER ""
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#define SECRET_MQTT_PASSWORD ""

‎energymonitor.ino

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#include <PxMatrix.h>
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#include <ESP8266WiFi.h>
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#include <PubSubClient.h>
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#include <Ticker.h>
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#include "arduino_secrets.h"
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// === CONFIGURATION ====
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const char* ssid = SECRET_WIFI_SSID;
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const char* password = SECRET_WIFI_PASSWORD;
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const char* mqtt_server = SECRET_MQTT_SERVER;
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const char* mqtt_username = SECRET_MQTT_USER;
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const char* mqtt_password = SECRET_MQTT_PASSWORD;
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const char* mqtt_client_id = "Energy-Montor";
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const uint16_t mqtt_port = 1883;
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const char* pv_power_topic = "homeassistant/pv-power";
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const char* grid_power_topic = "homeassistant/grid-power";
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// =======================
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WiFiClient espClient;
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PubSubClient mqttClient(espClient);
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Ticker displayTicker;
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// This defines the 'on' time of the display is us. The larger this number,
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// the brighter the display. If too large the ESP will crash
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uint8_t display_draw_time = 60; //30-70 is usually fine
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#define MATRIX_WIDTH 64
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#define MATRIX_HEIGHT 32
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PxMATRIX display(MATRIX_WIDTH, MATRIX_HEIGHT, 16, 2, 5, 4, 15, 12);
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// colors
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const uint16_t white = display.color565(255, 255, 255);
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const uint16_t red = display.color565(255, 77, 77);
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const uint16_t green = display.color565(159, 255, 128);
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const uint16_t blue = display.color565(0, 0, 255);
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const uint16_t black = display.color565(0, 0, 0);
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// Converted using the following site: http://www.rinkydinkelectronics.com/t_imageconverter565.php
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uint16_t static sun[] = {
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0xDE03, 0x0000, 0x0000, 0x0000, 0xE623, 0x0000, 0x0000, 0x0000, 0xCD63, 0x0000, 0xDE03, 0x0000, 0x0000, 0xEE63, 0x0000, 0x0000, // 0x0010 (16) pixels
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0xDE03, 0x0000, 0x0000, 0x0000, 0x8BC1, 0xDE03, 0xFEE4, 0xDE03, 0x8BC1, 0x0000, 0x0000, 0x0000, 0x0000, 0xDE03, 0xFEE4, 0xFEE4, // 0x0020 (32) pixels
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0xFEE4, 0xDE03, 0x0000, 0x0000, 0xE623, 0xF6A3, 0xFEE4, 0xFEE4, 0xFEE4, 0xFEE4, 0xFEE4, 0xF683, 0xD5E3, 0x0000, 0x0000, 0xDE03, // 0x0030 (48) pixels
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0xFEE4, 0xFEE4, 0xFEE4, 0xDE03, 0x0000, 0x0000, 0x0000, 0x0000, 0x8BC1, 0xDE03, 0xFEE4, 0xDE03, 0x8BC1, 0x0000, 0x0000, 0x0000, // 0x0040 (64) pixels
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0xDE03, 0x0000, 0x0000, 0xDE03, 0x0000, 0x0000, 0xF6A3, 0x0000, 0xDE03, 0x0000, 0x0000, 0x0000, 0xDE03, 0x0000, 0x0000, 0x0000, // 0x0050 (80) pixels
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0xDE03
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};
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uint16_t static house[] = {
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0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0xE924, 0x0000, 0x0000, // 0x0010 (16) pixels
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0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0xE924, 0xFFFF, 0xE924, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0xE924, 0xD0E3, 0xE924, // 0x0020 (32) pixels
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0xA8A2, 0xE924, 0x0000, 0x0000, 0xE924, 0xE924, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xD0E3, 0xD0E3, 0x0000, 0xE924, 0xFFFF, // 0x0030 (48) pixels
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0xD3A0, 0xFFFF, 0x32D6, 0xEF7E, 0xE924, 0x0000, 0x0000, 0xE924, 0xFFFF, 0xD3A0, 0xFFFF, 0xC65C, 0xFFFF, 0xE924, 0x0000, 0x0000, // 0x0040 (64) pixels
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0xE924, 0xFFFF, 0xD3A0, 0xFFFF, 0xFFFF, 0xFFFF, 0xE924, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, // 0x0050 (80) pixels
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0x0000
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};
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uint16_t static pole[] = {
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0x0000, 0x0000, 0x096A, 0x1B14, 0x1B56, 0x1B14, 0x096A, 0x0000, 0x0000, 0x0000, 0x096A, 0x1B14, 0x0000, 0x1B56, 0x0000, 0x1B14, // 0x0010 (16) pixels
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0x096A, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x1B56, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x096A, 0x1B14, 0x1B56, // 0x0020 (32) pixels
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0x1B14, 0x09ED, 0x0043, 0x0000, 0x0000, 0x096A, 0x1B14, 0x0000, 0x1B56, 0x0000, 0x12B2, 0x096A, 0x0000, 0x0000, 0x0000, 0x0000, // 0x0030 (48) pixels
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0x0000, 0x1B56, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x1B56, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, // 0x0040 (64) pixels
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0x0000, 0x0000, 0x0000, 0x1B56, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x8B24, 0x8B24, 0x8B24, 0x8B24, 0x8B24, 0x8B24, 0x8B24, // 0x0050 (80) pixels
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0x0000
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};
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struct State {
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float pvPower;
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float gridPower;
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float powerConsumption;
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};
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State state = { 0.0, 0.0, 0.0 };
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void setup() {
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Serial.begin(9600);
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// 1/16 scan display
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display.begin(16);
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display.clearDisplay();
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displayTicker.attach(0.004, displayUpdater);
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setupWifi();
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display.clearDisplay();
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drawStaticImages();
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mqttClient.setServer(mqtt_server, mqtt_port);
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mqttClient.setCallback(mqttCallback);
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}
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// ISR (interrupt service routine) for display refresh
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void displayUpdater() {
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display.display(display_draw_time);
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}
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void setupWifi() {
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delay(10);
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display.setCursor(0, 0);
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display.setTextColor(blue);
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display.printf("Connecting to %s", ssid);
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WiFi.mode(WIFI_STA);
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WiFi.begin(ssid, password);
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while (WiFi.status() != WL_CONNECTED) {
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delay(3000);
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display.print(".");
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}
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display.clearDisplay();
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display.setCursor(0, 0);
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display.println("connected");
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display.println(WiFi.localIP());
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delay(2000);
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}
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void loop() {
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if (!mqttClient.connected()) {
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connectToMqttServer();
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}
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mqttClient.loop();
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}
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void connectToMqttServer() {
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while (!mqttClient.connected()) {
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Serial.print("Attempting MQTT connection...");
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mqttClient.setServer(mqtt_server, 1883);
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mqttClient.setCallback(mqttCallback);
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// Attempt to connect
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if (mqttClient.connect(mqtt_client_id, mqtt_username, mqtt_password)) {
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Serial.println("connected");
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mqttClient.subscribe(pv_power_topic);
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mqttClient.subscribe(grid_power_topic);
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} else {
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Serial.print("failed, rc=");
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Serial.print(mqttClient.state());
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Serial.println(" trying again in 5 seconds");
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delay(5000);
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}
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}
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}
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void mqttCallback(char* topic, byte* payload, unsigned int length) {
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payload[length] = '\0';
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String payloadStr = String((char*)payload);
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Serial.printf("Message arrived [%s]: %s\n", topic, payloadStr);
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float floatPayload = payloadStr.toFloat();
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if (strcmp(topic, pv_power_topic) == 0) {
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state.pvPower = floatPayload;
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} else if (strcmp(topic, grid_power_topic) == 0) {
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state.gridPower = floatPayload;
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}
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state.powerConsumption = state.gridPower + state.pvPower;
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updateDisplay();
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}
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void drawStaticImages() {
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drawIcon(sun, 1, 1);
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drawIcon(house, 1, 11);
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drawIcon(pole, 1, 21);
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}
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void drawIcon(uint16_t* icon, int x, int y) {
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int iconHeight = 9;
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int iconWidth = 9;
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int counter = 0;
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for (int yy = 0; yy < iconHeight; yy++) {
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for (int xx = 0; xx < iconWidth; xx++) {
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display.drawPixel(x + xx, y + yy, icon[counter]);
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counter++;
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}
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}
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}
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void updateDisplay() {
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display.fillRect(10, 2, MATRIX_WIDTH - 10, MATRIX_HEIGHT - 5, black);
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display.setCursor(9, 2);
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display.setTextColor(white);
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display.printf("%7.1f W", state.pvPower);
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display.setCursor(9, 12);
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display.setTextColor(white);
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display.printf("%7.1f W", state.powerConsumption);
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display.setCursor(9, 22);
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if (state.gridPower > 0) {
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display.setTextColor(red);
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} else if (state.gridPower < 0) {
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display.setTextColor(green);
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} else {
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display.setTextColor(white);
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}
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display.printf("%7.1f W", state.gridPower);
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}

‎grid.png

4.44 KB
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‎house.png

4.4 KB
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‎sun.png

4.22 KB
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