#include <Arduino.h>
#include <SensirionI2CScd4x.h>
#include <Wire.h>
#define LILYGO_T5_V213
#include <boards.h>
#include <GxEPD.h>
#include <GxGDEH0213B73/GxGDEH0213B73.h>
#include <Fonts/FreeMonoBold12pt7b.h>
#include <GxIO/GxIO_SPI/GxIO_SPI.h>
#include <GxIO/GxIO.h>
GxIO_Class io(SPI, EPD_CS, EPD_DC, EPD_RSET);
GxEPD_Class display(io, EPD_RSET, EPD_BUSY);
SPIClass SDSPI(VSPI);
SensirionI2CScd4x scd4x;
void printUint16Hex(uint16_t value) {
Serial.print(value < 4096 ? "0" : "");
Serial.print(value < 256 ? "0" : "");
Serial.print(value < 16 ? "0" : "");
Serial.print(value, HEX);
}
void printSerialNumber(uint16_t serial0, uint16_t serial1, uint16_t serial2) {
Serial.print("Serial: 0x");
printUint16Hex(serial0);
printUint16Hex(serial1);
printUint16Hex(serial2);
Serial.println();
}
void setup() {
Serial.begin(115200);
while (!Serial) {
delay(100);
}
Wire.begin(21,22);
SPI.begin(EPD_SCLK, EPD_MISO, EPD_MOSI);
display.init();
display.setTextColor(GxEPD_BLACK);
display.setRotation(3);
display.setFont(&FreeMonoBold12pt7b);
display.fillScreen(GxEPD_WHITE);
display.update();
uint16_t error;
char errorMessage[256];
scd4x.begin(Wire);
error = scd4x.stopPeriodicMeasurement();
if (error) {
Serial.print("Error trying to execute stopPeriodicMeasurement(): ");
errorToString(error, errorMessage, 256);
Serial.println(errorMessage);
}
uint16_t serial0;
uint16_t serial1;
uint16_t serial2;
error = scd4x.getSerialNumber(serial0, serial1, serial2);
if (error) {
Serial.print("Error trying to execute getSerialNumber(): ");
errorToString(error, errorMessage, 256);
Serial.println(errorMessage);
} else {
printSerialNumber(serial0, serial1, serial2);
}
error = scd4x.startPeriodicMeasurement();
if (error) {
Serial.print("Error trying to execute startPeriodicMeasurement(): ");
errorToString(error, errorMessage, 256);
Serial.println(errorMessage);
}
Serial.println("Waiting for first measurement... (5 sec)");
}
void loop() {
uint16_t error;
char errorMessage[256];
delay(5000);
uint16_t co2 = 0;
float temperature = 0.0f;
float humidity = 0.0f;
error = scd4x.readMeasurement(co2, temperature, humidity);
display.fillScreen(GxEPD_WHITE);
display.setCursor(0,20);
if (error) {
display.print("read error: ");
errorToString(error, errorMessage, 256);
display.println(errorMessage);
} else if (co2 == 0) {
display.println("Invalid sample detected, skipping.");
} else {
display.print("Co2:");
display.println(co2);
display.print("Temperature:");
display.println(temperature);
display.print("Humidity:");
display.println(humidity);
}
display.update();
}