smash/ebk-unhb-co2ampel
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code cleanup

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nilo 2020-10-31 12:02:27 +01:00
parent 6569a14ebf
commit 48cbcd7d34
1 changed files with 48 additions and 65 deletions
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71
ebk_co2ampel/ebk_co2ampel.ino
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@ -1,78 +1,65 @@
#include <Arduino.h> #include <Arduino.h>
#include "MHZ19.h" #include "MHZ19.h"
#include "SSD1306Wire.h"
#define RX_PIN 16
#define TX_PIN 17
#define BAUDRATE 9600
#include <Wire.h> // Only needed for Arduino 1.6.5 and earlier MHZ19 myMHZ19;
#include "SSD1306Wire.h" // legacy include: `#include "SSD1306.h"`
#define RX_PIN 16 // Rx pin which the MHZ19 Tx pin is attached to
#define TX_PIN 17 // Tx pin which the MHZ19 Rx pin is attached to
#define BAUDRATE 9600 // Device to MH-Z19 Serial baudrate (should not be changed)
MHZ19 myMHZ19; // Constructor for library HardwareSerial mySerial(1);
SSD1306Wire display(0x3c, 21, 22);
HardwareSerial mySerial(1); // (ESP32 Example) create device to MH-Z19 serial
SSD1306Wire display(0x3c, 21, 22);
unsigned long getDataTimer = 0; unsigned long getDataTimer = 0;
int lastvals[120]; int lastvals[120];
int dheight;
void setup() void setup()
{ {
Serial.begin(9600); // Device to serial monitor feedback Serial.begin(9600);
mySerial.begin(BAUDRATE, SERIAL_8N1, RX_PIN, TX_PIN);
mySerial.begin(BAUDRATE, SERIAL_8N1, RX_PIN, TX_PIN); // (ESP32 Example) device to MH-Z19 serial start myMHZ19.begin(mySerial);
myMHZ19.begin(mySerial); // *Serial(Stream) refence must be passed to library begin().
display.init(); display.init();
// display.flipScreenVertically();
display.setContrast(255); display.setContrast(255);
delay(1000); delay(1000);
display.clear(); display.clear();
dheight = display.getHeight();
myMHZ19.autoCalibration(); // Turn auto calibration ON (OFF autoCalibration(false)) myMHZ19.autoCalibration();
for (int x; x <= 119; x = x + 1) {
for (int x; x<=119; x=x+1) {
lastvals[x] = -1; lastvals[x] = -1;
} }
} }
int calc_vpos_for_co2(int co2val, int display_height) {
return display_height - int((float(display_height) / 3000) * co2val);
}
void loop() void loop()
{ {
if (millis() - getDataTimer >= 2000) if (millis() - getDataTimer >= 5000)
{ {
int CO2; int CO2;
CO2 = myMHZ19.getCO2();
/* note: getCO2() default is command "CO2 Unlimited". This returns the correct CO2 reading even for (int x = 1; x <= 119; x = x + 1) {
if below background CO2 levels or above range (useful to validate sensor). You can use the lastvals[x - 1] = lastvals[x];
usual documented command with getCO2(false) */
CO2 = myMHZ19.getCO2(); // Request CO2 (as ppm)
for (int x=1; x<=119; x=x+1) {
lastvals[x-1] = lastvals[x];
} }
lastvals[119] = CO2; lastvals[119] = CO2;
display.clear(); display.clear();
for (int h = 1; h < 120; h = h + 1) {
for (int h=1; h<120; h=h+1) {
int curval = lastvals[h]; int curval = lastvals[h];
if (curval > 0) { if (curval > 0) {
int vpos = display.getHeight() - int((float(display.getHeight()) / 3000) * lastvals[h]); int vpos = calc_vpos_for_co2(lastvals[h], dheight);
int vpos_1 = display.getHeight() - int((float(display.getHeight()) / 3000) * lastvals[h-1]); int vpos_last = calc_vpos_for_co2(lastvals[h - 1], dheight);
display.drawLine(h - 1, vpos_last, h, vpos);
display.drawLine(h-1, vpos_1, h, vpos);
} }
} }
int8_t Temp;
Temp = myMHZ19.getTemperature(); // Request Temperature (as Celsius)
display.setLogBuffer(5, 30); display.setLogBuffer(5, 30);
display.println(CO2); display.println(CO2);
@ -80,10 +67,6 @@ void loop()
display.display(); display.display();
Serial.print("CO2 (ppm): "); Serial.print("CO2 (ppm): ");
Serial.println(CO2); Serial.println(CO2);
Serial.println();
Serial.print("Temperature (C): ");
Serial.println(Temp);
getDataTimer = millis(); getDataTimer = millis();
} }
} }