forked from github/ebk_co2ampel
249 lines
7.8 KiB
C++
249 lines
7.8 KiB
C++
#include <Arduino.h>
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#include "MHZ19.h"
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#include "SSD1306Wire.h"
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#include <Adafruit_NeoPixel.h>
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#include "fonts-custom.h"
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#include <Preferences.h>
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#include "uptime_formatter.h"
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// Grenzwerte für die CO2 Werte für grün und gelb, alles überhalb davon bedeutet rot
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#define GREEN_CO2 800
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#define YELLOW_CO2 1000
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// CO2 Messintervall in Milisekunden
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#define INTERVAL 15*1000
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// Dauer der Kalibrierungsphase in Milisekunden
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#define CALINTERVAL 180*1000
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// Boot-Mode Konstanten
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#define BOOT_NORMAL 42
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#define BOOT_CALIBRATE 23
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#define BOOT_UNKNOWN 63
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// Pins für den MH-Z19b
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#define RX_PIN 16
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#define TX_PIN 17
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// Pins für das SD1306 OLED-Display
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#define SDA_PIN 21
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#define SCL_PIN 22
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// Pin für den LED-Ring
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#define LED_PIN 4
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// Anzahl der angeschlossenen LEDs am Ring
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#define NUMPIXELS 8
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Preferences preferences;
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MHZ19 myMHZ19;
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HardwareSerial mySerial(1);
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SSD1306Wire display(0x3c, SDA_PIN, SCL_PIN);
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Adafruit_NeoPixel pixels = Adafruit_NeoPixel(NUMPIXELS, LED_PIN, NEO_RGB + NEO_KHZ800);
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String ampelversion = "0.12";
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unsigned long getDataTimer = 0;
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unsigned long getDataTimer1 = 0;
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int countdown = 0;
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int lastvals[120];
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int dheight;
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int safezone = false;
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int tocalibrateornot;
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void switchBootMode(int bm){
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switch (bm){
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case BOOT_CALIBRATE:
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preferences.putUInt("cal", BOOT_NORMAL);
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Serial.println("Startmodus nächster Reboot: Messmodus");
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break;
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case BOOT_NORMAL:
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preferences.putUInt("cal", BOOT_CALIBRATE);
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Serial.println("Startmodus nächster Reboot: Kalibrierungsmodus");
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break;
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case BOOT_UNKNOWN:
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Serial.println("EEPROM lesen war nicht möglich!");
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break;
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default:
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Serial.print("EEPROM lesen lieferte unerwarteten Wert: ");
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Serial.println(bm);
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break;
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}
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}
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void setup() {
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Serial.begin(115200);
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Serial.println("Starte...");
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Serial.print("CO2-Ampel Firmware: ");Serial.println(ampelversion);
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// Ab hier Bootmodus initialisieren und festlegen
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preferences.begin("co2", false);
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tocalibrateornot = preferences.getUInt("cal", BOOT_UNKNOWN); // wir lesen unser flag ein,
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// 23 = reboot vor safezone, wir wollen kalibrieren,
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// 42 = reboot nach safezone, wir tun nichts
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preferences.putUInt("cal", BOOT_CALIBRATE); // wir sind gerade gestartet
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switch(tocalibrateornot){
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case BOOT_CALIBRATE:
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Serial.println("Startmodus Aktuell: Kalibrierungsmodus");
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break;
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case BOOT_NORMAL:
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Serial.println("Startmodus Aktuell: Messmodus");
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break;
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}
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// Ab hier Display einrichten
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display.init();
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display.setFont(Cousine_Regular_54);
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display.setContrast(255);
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delay(500);
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display.clear();
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display.flipScreenVertically();
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display.setTextAlignment(TEXT_ALIGN_CENTER);
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display.drawString(64 ,0 , String(ampelversion));
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display.display();
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dheight = display.getHeight();
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// Ab hier Sensor einrichten
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mySerial.begin(9600, SERIAL_8N1, RX_PIN, TX_PIN);
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myMHZ19.begin(mySerial);
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myMHZ19.autoCalibration(false); // "Automatic Baseline Calibration" (ABC) erstmal aus
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char myVersion[4];
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myMHZ19.getVersion(myVersion);
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Serial.print("\nMH-Z19b Firmware Version: ");
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Serial.print(myVersion[0]);Serial.print(myVersion[1]);;Serial.print(".");Serial.print(myVersion[2]);Serial.println(myVersion[3]);
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Serial.print("Range: "); Serial.println(myMHZ19.getRange());
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Serial.print("Background CO2: "); Serial.println(myMHZ19.getBackgroundCO2());
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Serial.print("Temperature Cal: "); Serial.println(myMHZ19.getTempAdjustment());
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Serial.print("ABC Status: "); myMHZ19.getABC() ? Serial.println("ON") : Serial.println("OFF");
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Serial.print("read EEPROM value: "); Serial.println(tocalibrateornot);
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// Liste der Messwerte mit "-1" befüllen ("-1" wird beinm Graph nicht gezeichnet)
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for (int x = 0; x <= 119; x = x + 1) {
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lastvals[x] = -1;
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}
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// Ab hier LED-Ring konfigurien
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pixels.begin();
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pixels.clear();
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pixels.fill(pixels.Color(0,0,0));
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pixels.show();
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switchBootMode(tocalibrateornot); // beim nächsten boot im anderen modus starten
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}
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int calc_vpos_for_co2(int co2val, int display_height) {
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return display_height - int((float(display_height) / 3000) * co2val);
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}
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void set_led_color(int co2) {
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if (co2 < GREEN_CO2) {
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pixels.fill(pixels.Color(10,0,0)); // Grün
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} else if (co2 < YELLOW_CO2) {
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pixels.fill(pixels.Color(40,40,0)); // Gelb
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} else {
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pixels.fill(pixels.Color(0,0,90)); // Rot
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}
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pixels.show();
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}
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void rainbow(int wait) {
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for(long firstPixelHue = 0; firstPixelHue < 65536; firstPixelHue += 256) {
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for(int i=0; i<NUMPIXELS; i++) {
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int pixelHue = firstPixelHue + (i * 65536L / NUMPIXELS);
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pixels.setPixelColor(i, pixels.gamma32(pixels.ColorHSV(pixelHue)));
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}
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pixels.show();
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delay(wait);
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}
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}
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void calibrateCO2() {
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display.setFont(ArialMT_Plain_24);
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display.clear(); display.drawString(64, 0, "Kalibriere!"); display.display();
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Serial.println("Kalibrierung startet nun");
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myMHZ19.setRange(5000);
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delay(500);
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myMHZ19.calibrateZero();
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delay(500);
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myMHZ19.autoCalibration(false);
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delay(500);
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display.clear(); display.drawString(64, 0, "Fertig!"); display.display();
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preferences.putUInt("cal", BOOT_NORMAL);
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delay(2000);
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display.clear(); display.setFont(Cousine_Regular_54);
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}
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void readCO2(){
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if (millis() - getDataTimer >= INTERVAL) {
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// Neuen CO2 Wert lesen
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int CO2 = myMHZ19.getCO2();
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// Alle Werte in der Messwertliste um eins verschieben
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for (int x = 1; x <= 119; x = x + 1) {
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lastvals[x - 1] = lastvals[x];
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}
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// Aktuellen Messer am Ende einfügen
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lastvals[119] = CO2;
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// Display löschen und alles neu schreiben/zeichnen
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display.clear();
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for (int h = 1; h < 120; h = h + 1) {
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int curval = lastvals[h];
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if (curval > 0) {
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int vpos = calc_vpos_for_co2(lastvals[h], dheight);
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int vpos_last = calc_vpos_for_co2(lastvals[h - 1], dheight);
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display.drawLine(h - 1, vpos_last, h, vpos);
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}
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}
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// Farbe des LED-Rings setzen
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if (tocalibrateornot == BOOT_NORMAL) { set_led_color(CO2); }
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//display.setLogBuffer(1, 30);
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display.setFont(Cousine_Regular_54);
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display.setTextAlignment(TEXT_ALIGN_CENTER);
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display.drawString(64 ,0 , String(CO2));
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//display.drawLogBuffer(0, 0);
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display.display();
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// Ein wenig Debug-Ausgabe
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Serial.print("Neue Messung - Aktueller CO2-Wert: ");
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Serial.print(CO2);
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Serial.print("; Background CO2: " + String(myMHZ19.getBackgroundCO2()));
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Serial.print("; Temperatur: " + String(myMHZ19.getTemperature()) + " Temperature Adjustment: " + String(myMHZ19.getTempAdjustment()));
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//Serial.print(myMHZ19.getBackgroundCO2());
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Serial.println("; uptime: " + uptime_formatter::getUptime());
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getDataTimer = millis();
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}
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}
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void loop() {
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if (millis() > 10000) {
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Serial.println("=== 10 Sekunden im Betrieb, nächster Boot im Normalmodus ===");
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switchBootMode(BOOT_CALIBRATE);
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// preferences.putUInt("cal", NORMAL); // wir haben die safe zone erreicht, beim naechsten boot nicht kalibrieren!
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safezone = true;
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}
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if (safezone){
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if (tocalibrateornot == BOOT_CALIBRATE){
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if (millis() - getDataTimer1 <= CALINTERVAL) {
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rainbow(10);
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display.clear();
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display.setTextAlignment(TEXT_ALIGN_CENTER);
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//countdown = (CALINTERVAL - (getDataTimer1 + millis() * -1)) / 1000;
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//countdown = (millis() + getDataTimer1 - CALINTERVAL) * -1 / 1000;
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countdown = ((getDataTimer1 + CALINTERVAL) - millis()) / 1000;
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Serial.println("Countdown: " + String(countdown));
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display.drawString(64, 0, String(countdown));
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display.display();
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}
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else if (millis() - getDataTimer1 >= CALINTERVAL) {
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calibrateCO2();
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getDataTimer1 = millis();
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}
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}
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}
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readCO2();
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}
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