measurement_co2_by_S300L_for_wiolte.ino

/* Measurement CO2 by S-300L-3V for Wio LTE JP Version */
/* Output >>
Ready
862
866
871
875
877
*/

#include <WioLTEforArduino.h>
WioLTE Wio;

/* by S-300L: http://doc.switch-science.com/datasheets/ELT/User+Guide+for+U-ART+command+for+Low-Power+ver160719+cdg.pdf */
uint16_t CO2ppm() {
  while (!SerialUART.available()); /* wait max 3 seconds by spec (TODO: Timeout) */
  String buf = SerialUART.readStringUntil('\n'); /* separete char by spec */
  int pos = buf.lastIndexOf(" ppm"); /* Avoiding garbage in buffer */
  String v = buf.substring(pos - 6, pos);
  return v.toInt();
}

void setup() {
  delay(200);
  Wio.Init();
  SerialUSB.begin(115200);
  Wio.PowerSupplyGrove(true);
  delay(500);
  SerialUART.begin(38400);
  SerialUSB.println("Ready");
}

void loop() {
  uint16_t ppm = CO2ppm();
  SerialUSB.println(ppm);
  delay(5000);
}