Ah désolé pour cette confusion, le code .cpp:
/* DHT library
MIT license
written by Adafruit Industries
*/
#include "DHT.h"
#define MIN_INTERVAL 2000
DHT::DHT(uint8_t pin, uint8_t type, uint8_t count) {
_pin = pin;
_type = type;
#ifdef __AVR
_bit = digitalPinToBitMask(pin);
_port = digitalPinToPort(pin);
#endif
_maxcycles = microsecondsToClockCycles(1000); // 1 millisecond timeout for
// reading pulses from DHT sensor.
// Note that count is now ignored as the DHT reading algorithm adjusts itself
// basd on the speed of the processor.
}
void DHT::begin(void) {
// set up the pins!
pinMode(_pin, INPUT_PULLUP);
// Using this value makes sure that millis() - lastreadtime will be
// >= MIN_INTERVAL right away. Note that this assignment wraps around,
// but so will the subtraction.
_lastreadtime = -MIN_INTERVAL;
DEBUG_PRINT("Max clock cycles: "); DEBUG_PRINTLN(_maxcycles, DEC);
}
//boolean S == Scale. True == Fahrenheit; False == Celcius
float DHT::readTemperature(bool S, bool force) {
float f = NAN;
if (read(force)) {
switch (_type) {
case DHT11:
f = data[2];
if(S) {
f = convertCtoF(f);
}
break;
case DHT22:
case DHT21:
f = data[2] & 0x7F;
f *= 256;
f += data[3];
f *= 0.1;
if (data[2] & 0x80) {
f *= -1;
}
if(S) {
f = convertCtoF(f);
}
break;
}
}
return f;
}
float DHT::convertCtoF(float c) {
return c * 1.8 + 32;
}
float DHT::convertFtoC(float f) {
return (f - 32) * 0.55555;
}
float DHT::readHumidity(bool force) {
float f = NAN;
if (read()) {
switch (_type) {
case DHT11:
f = data[0];
break;
case DHT22:
case DHT21:
f = data[0];
f *= 256;
f += data[1];
f *= 0.1;
break;
}
}
return f;
}
//boolean isFahrenheit: True == Fahrenheit; False == Celcius
float DHT::computeHeatIndex(float temperature, float percentHumidity, bool isFahrenheit) {
// Using both Rothfusz and Steadman's equations
// http://www.wpc.ncep.noaa.gov/html/heatindex_equation.shtml
float hi;
if (!isFahrenheit)
temperature = convertCtoF(temperature);
hi = 0.5 * (temperature + 61.0 + ((temperature - 68.0) * 1.2) + (percentHumidity * 0.094));
if (hi > 79) {
hi = -42.379 +
2.04901523 * temperature +
10.14333127 * percentHumidity +
-0.22475541 * temperature*percentHumidity +
-0.00683783 * pow(temperature, 2) +
-0.05481717 * pow(percentHumidity, 2) +
0.00122874 * pow(temperature, 2) * percentHumidity +
0.00085282 * temperature*pow(percentHumidity, 2) +
-0.00000199 * pow(temperature, 2) * pow(percentHumidity, 2);
J'ai eu la mauvaise surprise ce midi de constaté que la sonde 1 (câble de 25m enroulé) ne remonte plus l'information. Donc ça a tenu environ 60h, sans erreur ponctuel de remonté d'information. ![]()
J'ai une sonde sur un petit câble monté sans condensateur de 20cm qui elle tient toujours depuis 60h.
Je vais tenter de croiser le GND et le data pour voir si ca améliore le problème.