forked from github/ebk_co2ampel
270 lines
7.2 KiB
C++
270 lines
7.2 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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// Maximum CO² levels for green and yellow, everything above is considered red.
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#define GREEN_CO2 800
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#define YELLOW_CO2 1000
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// Measurement interval in miliseconds
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#define INTERVAL 15000
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#define CALINTERVAL 180000
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// Pins for MH-Z19
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#define RX_PIN 16
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#define TX_PIN 17
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// Pins for SD1306
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#define SDA_PIN 21
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#define SCL_PIN 22
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// Pin for LED
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#define LED_PIN 4
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// number of LEDs connected
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#define NUMPIXELS 12
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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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unsigned long getDataTimer = 0;
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unsigned long getDataTimer1 = 0;
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int lastvals[120];
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int dheight;
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String ampelversion = "0.1";
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int safezone = 1;
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int tocalibrateornot;
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int initloop = 1;
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void switchBootMode(int bm){
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switch (bm){
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case 23:
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preferences.putUInt("cal", 42);
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Serial.println("startmodus naechster reboot: messmodus");
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break;
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case 42:
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preferences.putUInt("cal", 23);
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Serial.println("startmodus naechster reboot: kalibrierungsmodus");
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break;
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case 69:
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Serial.println("EEPROM lesen war nicht moeglich!");
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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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preferences.begin("co2", false);
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tocalibrateornot = preferences.getUInt("cal",69); // wir lesen unser flag ein, 23 = reboot vor safezone, wir wollen kalibrieren, 42 = reboot nach safezone, wir tun nichts
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preferences.putUInt("cal", 23); // wir sind gerade gestartet
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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); // baseline calibration erstmal aus
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pixels.clear();
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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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Serial.println("boot...");
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Serial.println(ampelversion);
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char myVersion[4];
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myMHZ19.getVersion(myVersion);
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Serial.print("\nFirmware Version: ");
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for(byte i = 0; i < 4; i++)
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{
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Serial.print(myVersion[i]);
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if(i == 1)
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Serial.print(".");
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}
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Serial.println("");
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Serial.print("Range: ");
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Serial.println(myMHZ19.getRange());
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Serial.print("Background CO2: ");
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Serial.println(myMHZ19.getBackgroundCO2());
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Serial.print("Temperature Cal: ");
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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: ");
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Serial.println(tocalibrateornot);
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switch(tocalibrateornot){
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case 23:
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Serial.println("startmodus aktuell: kalibrierungsmodus");
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break;
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case 42:
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Serial.println("startmodus aktuell: messmodus");
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break;
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}
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// Fill array of last measurements with -1
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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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pixels.begin();
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for(int i=0; i<NUMPIXELS; i++) {
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pixels.setPixelColor(i, 0,0,50);
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pixels.show();
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}
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switchBootMode(tocalibrateornot); // beim naechsten 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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// Green
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for(int i=0; i<NUMPIXELS; i++) {
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pixels.setPixelColor(i, 30,0,0);
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}
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} else if (co2 < YELLOW_CO2) {
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// Yellow
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for(int i=0; i<NUMPIXELS; i++) {
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pixels.setPixelColor(i, 40,40,0);
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}
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} else {
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// Red
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for(int i=0; i<NUMPIXELS; i++) {
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pixels.setPixelColor(i, 0,90,0);
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}
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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.clear();
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display.drawString(64, 0, "CAL!");
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display.display();
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Serial.println("brace yourself, calibration starting! things either be better or all fucked up beyond this point...");
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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();
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display.drawString(64, 0, "DONE");
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display.display();
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preferences.putUInt("cal", 42);
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display.clear();
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}
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void readco2(){
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if (millis() - getDataTimer >= INTERVAL) {
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// Get new CO² value.
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int CO2 = myMHZ19.getCO2();
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// Shift entries in array back one position.
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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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// Add new measurement at the end.
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lastvals[119] = CO2;
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// Clear display and redraw whole graph.
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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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// Set LED color and print value on display
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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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// Debug output
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Serial.print("CO2 (ppm): ");
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Serial.print(CO2);
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Serial.print(" Background CO2: " + String(myMHZ19.getBackgroundCO2()));
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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 (initloop == 1) {
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if (millis() > 10000) {
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Serial.println("=== safe zone ===");
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switchBootMode(23);
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// preferences.putUInt("cal", 42); // wir haben die safe zone erreicht, beim naechsten boot nicht kalibrieren!
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safezone = 0;
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initloop = 0;
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}
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}
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if (safezone == 0){
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if (tocalibrateornot == 23){
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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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display.drawString(64, 0, String(180 - millis()/1000));
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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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else if (tocalibrateornot ==42){
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if(initloop==1){
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Serial.println("fake news, nobody has the intention to do calibration....");
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initloop=0;
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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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