temp sensor

mcp9808wemos.ino

/**************************************************************************/
/*!
This is a demo for the Adafruit MCP9808 breakout
----> http://www.adafruit.com/products/1782
Adafruit invests time and resources providing this open source code,
please support Adafruit and open-source hardware by purchasing
products from Adafruit!
*/
/**************************************************************************/

#include <Wire.h>
#include "Adafruit_MCP9808.h"
#include <ESP8266WiFi.h>


#ifndef STASSID
#define STASSID "GoogleGuest-Legacy"
#define STAPSK  ""
#endif

const char* ssid     = STASSID;
const char* password = STAPSK;

// Create the MCP9808 temperature sensor object
Adafruit_MCP9808 tempsensor = Adafruit_MCP9808();

void setup() {
  Serial.begin(115200);

  Serial.println();
  Serial.println();
  Serial.print("Connecting to...");
  Serial.println(ssid);

  WiFi.mode(WIFI_STA);
  WiFi.begin(ssid, password);

  while (WiFi.status() != WL_CONNECTED) {
    delay(500);
    Serial.print(".");
  }
  Serial.println("");
  Serial.println("Wi-Fi connected successfully");
  Serial.println("IP address: ");
  Serial.println(WiFi.localIP());
  
  while (!Serial); //waits for serial terminal to be open, necessary in newer arduino boards.
  Serial.println("MCP9808 demo");
  
  // Make sure the sensor is found, you can also pass in a different i2c
  // address with tempsensor.begin(0x19) for example, also can be left in blank for default address use
  // Also there is a table with all addres possible for this sensor, you can connect multiple sensors
  // to the same i2c bus, just configure each sensor with a different address and define multiple objects for that
  //  A2 A1 A0 address
  //  0  0  0   0x18  this is the default address
  //  0  0  1   0x19
  //  0  1  0   0x1A
  //  0  1  1   0x1B
  //  1  0  0   0x1C
  //  1  0  1   0x1D
  //  1  1  0   0x1E
  //  1  1  1   0x1F
  if (!tempsensor.begin(0x18)) {
    Serial.println("Couldn't find MCP9808! Check your connections and verify the address is correct.");
    while (1);
  }
    
   Serial.println("Found MCP9808!");

  tempsensor.setResolution(3); // sets the resolution mode of reading, the modes are defined in the table bellow:
  // Mode Resolution SampleTime
  //  0    0.5°C       30 ms
  //  1    0.25°C      65 ms
  //  2    0.125°C     130 ms
  //  3    0.0625°C    250 ms
}

void loop() {
  Serial.println("wake up MCP9808.... "); // wake up MCP9808 - power consumption ~200 mikro Ampere
  tempsensor.wake();   // wake up, ready to read!

  // Read and print out the temperature, also shows the resolution mode used for reading.
  Serial.print("Resolution in mode: ");
  Serial.println (tempsensor.getResolution());
  float c = tempsensor.readTempC();
  float f = tempsensor.readTempF();
  Serial.print("Temp: "); 
  Serial.print(c, 4); Serial.print("*C\t and "); 
  Serial.print(f, 4); Serial.println("*F.");
  
  delay(2000);
  Serial.println("Shutdown MCP9808.... ");
  tempsensor.shutdown_wake(1); // shutdown MSP9808 - power consumption ~0.1 mikro Ampere, stops temperature sampling
  Serial.println("");
  delay(200);
}