2025-05-1600

2025-05-16 08:03:01 +02:00
parent 831c3830a5
commit 1b337209e0
10 changed files with 1379 additions and 0 deletions
--- a/include/CO2.h
+++ b/include/CO2.h
@ -0,0 +1,101 @@
+#include <Arduino.h>
+
+#include <HardwareSerial.h>
+
+HardwareSerial Co2Port(1); // use UART2
+
+// co2 Grenzwerte
+/* #define CO2_WARN_1 650
+#define CO2_WARN_2 950
+#define CO2_WARN_3 1250
+#define CO2_WARN_4 1500
+#define CO2_CRITICAL_PPM 1850 */
+/* #define CO2_WARN_1 600
+#define CO2_WARN_2 800
+#define CO2_WARN_3 1000
+#define CO2_WARN_4 1500
+#define CO2_WARN_5 2000 */
+#define CO2_WARN_1 800
+#define CO2_WARN_2 1000
+#define CO2_WARN_3 1400
+#define CO2_WARN_4 1500
+#define CO2_WARN_5 2000
+#define CO2_CRITICAL_PPM 1850
+
+int CO2Wert = -99;
+char antwort[100] = {0xFF};
+int range =2000;
+bool readCo2Flag;
+
+char getCheckSum(char *packet)
+  {
+    char i, checksum;
+    for (i = 1; i < 8; i++)
+    {
+      checksum += packet[i];
+    }
+    checksum = 0xFF - checksum;
+    return checksum +1;
+  }
+
+int readCO2() {
+  char cmd[9] = {0xFF, 0x01, 0x86, 0x00, 0x00, 0x00, 0x00, 0x00, 0x79};
+  Co2Port.write(cmd,9);
+  if(Co2Port.available()) {
+    Co2Port.readBytes(antwort, 9);
+  }
+  #ifdef DebugCO2
+  for (int a=0; a<9; a++){
+    Serial.printf(" BufferRead [%d] = 0x%02X \n", a, antwort[a]);
+  }
+  Serial.println();
+  #endif
+  if (antwort[0] != 0xFF) return -1;
+  if (antwort[1] != 0x86) return -2;
+  int antwortHigh = (int) antwort[2]; // CO2 High Byte
+  int antwortLow = (int) antwort[3];  // CO2 Low Byte
+  int ppm = (256 * antwortHigh) + antwortLow;
+  Co2Port.flush();
+  return ppm; 
+}
+
+void calibrationCo2() {
+  char cmd[9] = {0xFF, 0x01, 0x79, 0xA0, 0x00, 0x00, 0x00, 0x00, 0x00};
+  cmd[8] = getCheckSum(cmd);
+  Serial.printf("Checksumme = 0x%02X\n", cmd[8]);
+  Co2Port.write(cmd,9);
+  #ifdef DebugCO2
+  for (int a=0; a<9; a++){
+    Serial.printf(" BufferCalibration [%d] = 0x%02X \n", a, cmd[a]);
+  }
+  Serial.println();
+  #endif
+}
+
+void setRange()
+{
+  char cmd[9] = {0xFF, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00};
+  
+  cmd[6] = range >> 8;
+  cmd[7] = range & 0xFF;
+  cmd[8] = getCheckSum(cmd);
+  Serial.printf("Checksumme = 0x%02X\n", cmd[8]);
+  Co2Port.write(cmd,9);
+  #ifdef DebugCO2
+  for (int a=0; a<9; a++){
+    Serial.printf(" BufferRange [%d] = 0x%02X \n", a, cmd[a]);
+  }
+  Serial.println();
+  #endif
+}
+
+void beginC02()
+{
+  Co2Port.begin(9600, SERIAL_8N1, 32, 33); 
+  readCo2Flag = false;
+  delay(100);
+  calibrationCo2();
+  delay(100);
+  setRange();
+  delay(100);
+}