NodeMCU + BME280 + DHT22 + Dallas - can't read from i2c
Posted: Sat Feb 18, 2017 5:30 amHi all,
I'm fighting with my nodemcu board for a few days. I can't force it to read using i2c bus from BME280 sensor. DHT22 is working fine. Could someone take a look at my code and advise me what's wrong with it?
Thank you
I'm fighting with my nodemcu board for a few days. I can't force it to read using i2c bus from BME280 sensor. DHT22 is working fine. Could someone take a look at my code and advise me what's wrong with it?
Thank you
Code: Select all
#define debug 1 // debug on/off
#include <DHT.h>
#include <ESP8266WiFi.h>
#include <OneWire.h>
#include <DallasTemperature.h>
#include <Wire.h>
#include <SPI.h>
#include <Adafruit_Sensor.h>
#include <Adafruit_BME280.h>
#define SEALEVELPRESSURE_HPA (1013.25)
Adafruit_BME280 bme; // I2C
// replace with your channel's thingspeak API key,
String apiKey = "api key";
// WiFi Details
const char* ssid = "ssid";
const char* password = "pass";
const char* server = "api.thingspeak.com";
// GPIO05 / D1 - zdefiniuj PIN DHT
#define DHTPIN 13
// zdefiniuj typ czujnika
#define DHTTYPE DHT22
DHT dht(DHTPIN, DHTTYPE);
// PIN15 / D8 - zdefuniuj pin dla Dallas
#define ONE_WIRE_BUS 15
OneWire oneWire(ONE_WIRE_BUS);
DallasTemperature sensors(&oneWire);
double node3DewPoint;
WiFiClient client;
void setup() {
Serial.begin(115200);
delay(10);
dht.begin();
//I2C Test
Serial.println("Starting I2C !");
Wire.begin(0, 2);
for (byte address = 1; address < 127; address++) {
Wire.beginTransmission(address);
byte error = Wire.endTransmission();
if (error == 0) {
Serial.print("I2C device found at address 0x");
if (address < 16)
Serial.print("0");
Serial.print(address,HEX);
Serial.println(" !");
}
else if (error == 4) {
Serial.print("Unknown error at address 0x");
if (address < 16)
Serial.print("0");
Serial.println(address,HEX);
}
}
Serial.println("ESP to Thingspeak"); //Print a message
sensors.begin();
WiFi.begin(ssid, password);
Serial.println();
Serial.println();
Serial.print("Logowanie do: ");
Serial.println(ssid);
WiFi.begin(ssid, password);
while (WiFi.status() != WL_CONNECTED) {
delay(500);
Serial.print(".");
}
Serial.println("");
Serial.println("Zalogowano do WiFi");
}
void loop()
{
float h = dht.readHumidity();
float t = dht.readTemperature();
float g = sensors.getTempCByIndex(0);
float temp = bme.readTemperature();
float pres = bme.readPressure() / 100.0F;
float altitude = bme.readAltitude(SEALEVELPRESSURE_HPA);
float hum = bme.readHumidity();
float node3DewPoint = dewPointAccurate(temp, hum);
// Serial Debug wlacz/wylacz na poczatku skryptu
if (debug == 1)
{
Serial.print("Temperatura powietrza [st. C]: ");
Serial.print(t);
Serial.print("\n");
Serial.print("Wilgotnosc [%]: ");
Serial.print(h);
Serial.print("\n");
Serial.print("Temperatura gruntu [st. C]: ");
Serial.print(g);
Serial.print("\n");
Serial.print("BME280 Temperatura [st. C]: ");
Serial.print(temp);
Serial.print("\n");
Serial.print("BME280 Wilgotnosc [%]: ");
Serial.print(hum);
Serial.print("\n");
Serial.print("BME280 Cisnienie [hPa]: ");
Serial.print(pres);
Serial.print("\n");
Serial.print("BME280 Wysokosc [m]: ");
Serial.print(altitude);
Serial.print("\n");
Serial.print("Dew point: ");
Serial.print(node3DewPoint);
Serial.print("\n");
Serial.println(sensors.getTempCByIndex(0));
Serial.print("\n");
Serial.print("\n");
Serial.print("\n");
Serial.print("\n");
Serial.print("\n");
Serial.print("\n");
Serial.print("\n");
Serial.print("\n");
Serial.println("**** wysylam do TS");
Serial.println("-------------------------------------------");
}
if (client.connect(server,80)) { // "184.106.153.149" or api.thingspeak.com
String postStr = apiKey;
// DHT
postStr +="&field1=";
postStr += String(t);
postStr +="&field2=";
postStr += String(h);
// Dallas
postStr +="&field3=";
postStr += String(g);
// BME280
postStr += "&field4=";
postStr += String(temp);
postStr += "&field5=";
postStr += String(hum);
postStr += "&field6=";
postStr += String(pres);
postStr += "&field7=";
postStr += String(altitude);
// DewPoint
postStr += "&field8=";
postStr += String(node3DewPoint);
postStr += "\r\n\r\n";
client.print("POST /update HTTP/1.1\n");
client.print("Host: api.thingspeak.com\n");
client.print("Connection: close\n");
client.print("X-THINGSPEAKAPIKEY: "+apiKey+"\n");
client.print("Content-Type: application/x-www-form-urlencoded\n");
client.print("Content-Length: ");
client.print(postStr.length());
client.print("\n\n");
client.print(postStr);
}
client.stop();
Serial.println("Odczyt... kolejny za 30 sekund");
// Zdefiniuj opoznienie odczytu
delay(30000);
}
/*-----( Declare User-written Functions )-----*/
// dewPoint function NOAA
// reference (1) : http://wahiduddin.net/calc/density_algorithms.htm
// reference (2) : http://www.colorado.edu/geography/weather_station/Geog_site/about.htm
//
double dewPointAccurate (double celsius, double humidity)
{
// (1) Saturation Vapor Pressure = ESGG(T)
double RATIO = 373.15 / (273.15 + celsius);
double RHS = -7.90298 * (RATIO - 1);
RHS += 5.02808 * log10(RATIO);
RHS += -1.3816e-7 * (pow(10, (11.344 * (1 - 1 / RATIO ))) - 1) ;
RHS += 8.1328e-3 * (pow(10, (-3.49149 * (RATIO - 1))) - 1) ;
RHS += log10(1013.124); // NB = 1013 = absolute air pressure from BME280 sensor!!!!???????????????
// factor -3 is to adjust units - Vapor Pressure SVP * humidity
double VP = pow(10, RHS - 3) * humidity;
// (2) DEWPOINT = F(Vapor Pressure)
double T = log(VP / 0.61078); // temp var
return (241.88 * T) / (17.558 - T);
}
/* ==== END Functions ==== */