adafruit / DHT-sensor-library

Arduino library for DHT11, DHT22, etc Temperature & Humidity Sensors
https://learn.adafruit.com/dht
MIT License
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Using this Library with Energia throws some errors while it doesn't for Arduino #185

Closed allenbangai closed 3 years ago

allenbangai commented 3 years ago

I used this library DHTtester code on arduino and everything worked well, but while using it on Energia, it gave me some errors which where quite logical after going through the error details and verifying on DHT.cpp. So I which could receive some help Energia is an IDE used for Texas Instrument MSP430 microcontroller build with the arduino for arduino like coding and experience. Hence, under normal circumstances, the library for Arduino IDE should work same on Energia IDE. For more information on Energia, you can visit energia website That is why I come to this platform to ask for help.

The DHTtester code I used on both Arduino and Energia IDEs can be seen below

// Example testing sketch for various DHT humidity/temperature sensors
// Written by ladyada, public domain

// REQUIRES the following Arduino libraries:
// - DHT Sensor Library: https://github.com/adafruit/DHT-sensor-library
// - Adafruit Unified Sensor Lib: https://github.com/adafruit/Adafruit_Sensor

#include "DHT.h"

#define DHTPIN 2     // Digital pin connected to the DHT sensor
// Feather HUZZAH ESP8266 note: use pins 3, 4, 5, 12, 13 or 14 --
// Pin 15 can work but DHT must be disconnected during program upload.

// Uncomment whatever type you're using!
//#define DHTTYPE DHT11   // DHT 11
#define DHTTYPE DHT22   // DHT 22  (AM2302), AM2321
//#define DHTTYPE DHT21   // DHT 21 (AM2301)

// Connect pin 1 (on the left) of the sensor to +5V
// NOTE: If using a board with 3.3V logic like an Arduino Due connect pin 1
// to 3.3V instead of 5V!
// Connect pin 2 of the sensor to whatever your DHTPIN is
// Connect pin 3 (on the right) of the sensor to GROUND (if your sensor has 3 pins)
// Connect pin 4 (on the right) of the sensor to GROUND and leave the pin 3 EMPTY (if your sensor has 4 pins)
// Connect a 10K resistor from pin 2 (data) to pin 1 (power) of the sensor

// Initialize DHT sensor.
// Note that older versions of this library took an optional third parameter to
// tweak the timings for faster processors.  This parameter is no longer needed
// as the current DHT reading algorithm adjusts itself to work on faster procs.
DHT dht(DHTPIN, DHTTYPE);

void setup() {
  Serial.begin(9600);
  Serial.println(F("DHTxx test!"));

  dht.begin();
}

void loop() {
  // Wait a few seconds between measurements.
  delay(2000);

  // Reading temperature or humidity takes about 250 milliseconds!
  // Sensor readings may also be up to 2 seconds 'old' (its a very slow sensor)
  float h = dht.readHumidity();
  // Read temperature as Celsius (the default)
  float t = dht.readTemperature();
  // Read temperature as Fahrenheit (isFahrenheit = true)
  float f = dht.readTemperature(true);

  // Check if any reads failed and exit early (to try again).
  if (isnan(h) || isnan(t) || isnan(f)) {
    Serial.println(F("Failed to read from DHT sensor!"));
    return;
  }

  // Compute heat index in Fahrenheit (the default)
  float hif = dht.computeHeatIndex(f, h);
  // Compute heat index in Celsius (isFahreheit = false)
  float hic = dht.computeHeatIndex(t, h, false);

  Serial.print(F("Humidity: "));
  Serial.print(h);
  Serial.print(F("%  Temperature: "));
  Serial.print(t);
  Serial.print(F("°C "));
  Serial.print(f);
  Serial.print(F("°F  Heat index: "));
  Serial.print(hic);
  Serial.print(F("°C "));
  Serial.print(hif);
  Serial.println(F("°F"));
}

Error prompt the Energia IDE generated can be seen below.

C:\Users\DELL\Documents\Energia\libraries\DHT-sensor-library-master\DHT.cpp: In member function 'float DHT::readTemperature(bool, bool)':

C:\Users\DELL\Documents\Energia\libraries\DHT-sensor-library-master\DHT.cpp:86:13: error: 'NAN' was not declared in this scope

C:\Users\DELL\Documents\Energia\libraries\DHT-sensor-library-master\DHT.cpp: In member function 'float DHT::readHumidity(bool)':

C:\Users\DELL\Documents\Energia\libraries\DHT-sensor-library-master\DHT.cpp:149:13: error: 'NAN' was not declared in this scope

C:\Users\DELL\Documents\Energia\libraries\DHT-sensor-library-master\DHT.cpp: In member function 'bool DHT::read(bool)':

C:\Users\DELL\Documents\Energia\libraries\DHT-sensor-library-master\DHT.cpp:285:29: error: 'UINT32_MAX' was not declared in this scope

C:\Users\DELL\Documents\Energia\libraries\DHT-sensor-library-master\DHT.cpp:290:30: error: 'UINT32_MAX' was not declared in this scope

C:\Users\DELL\Documents\Energia\libraries\DHT-sensor-library-master\DHT.cpp:315:23: error: 'UINT32_MAX' was not declared in this scope

C:\Users\DELL\Documents\Energia\libraries\DHT-sensor-library-master\DHT.cpp: In member function 'uint32_t DHT::expectPulse(bool)':

C:\Users\DELL\Documents\Energia\libraries\DHT-sensor-library-master\DHT.cpp:382:14: error: 'UINT32_MAX' was not declared in this scope
ladyada commented 3 years ago

Hi - this is a question for Energia, they have something missing from their IDE - our code compiles correctly for proper Arduino