ESP8266 WiFi Project - DHT22 DeepSleep naar EmonCMS (logger)

Let op: Om DeepSleep te gebruiken moet je de ESP-01 aanpassen, zie hier voor meer informatie!

Informatie (ENG)

I wanted to have a few portable and long lasting temperature and possible humidity sensors I could just throw around hand have them working with as little hassle as possible. Enter the Battery Powered ESP8266 WiFI Temperature and Humidity cloud logger.

UPDATE
Unfortunately after numerous attempts, DHT22 and deep sleep do not seem to go well together. After some time, no matter what code and library I uses, it would stop sending data. I have had help from other community members as well testing this, and the results are always the same, the DHT dies after a number of deep sleep cycles.

For powered projects that don t sleep it is fine. If I get anywhere with it, I will post another update. We ve even added a transistor to switch it off, no go!, The DS18B20 based sensors however have been running since last august now without any hickups.

Wishes:

easily movable
last at least 3 months on a battery
minimum amount of components (that hopefully i had laying around)
post to emoncms
later: post to MQTT

Results:

ESP8266 ESP-01 based (had)
Arduino IDE with ESP8266 support based firmware, with WiFiManager for easier portability
DHT22 or DS18B20
low voltage drop and low quiescent current regulator
18650 Rechargeable Lithium LiFePO4 Battery (eCig battery)
upload data to EmonCMS

Schematic

Arduino Code

#include <ESP8266WiFi.h>

#include <WiFiClient.h>

#include <DNSServer.h>
#include <ESP8266WebServer.h>
#include <WiFiManager.h>        //https://github.com/tzapu/WiFiManager

#include <PietteTech_DHT.h>     //https://github.com/chaeplin/PietteTech_DHT-8266

//DHT22 config
#define DHTPIN 2 // what pin DHT is connected to
#define DHTTYPE DHT22 // DHT 11
//declaration
void dht_wrapper(); // must be declared before the lib initialization

// Lib instantiate
PietteTech_DHT DHT(DHTPIN, DHTTYPE, dht_wrapper);

// globals
bool bDHTstarted;       // flag to indicate we started acquisition

// This wrapper is in charge of calling
// must be defined like this for the lib work
void dht_wrapper() {
  DHT.isrCallback();
}

#define DEBUGPRINT

#ifdef DEBUGPRINT
#define DEBUG_PRINT(x)  Serial.println (x)
#else
#define DEBUG_PRINT(x)
#endif

//#include <SimpleTimer.h>          //http://playground.arduino.cc/Code/SimpleTimer  || https://github.com/jfturcot/SimpleTimer

char* topic = "nodes/battery/temp";
char* hellotopic = "nodes/register";
//IPAddress server(192, 168, 10, 10);

//SimpleTimer timer;

String clientName;
WiFiClient wifiClient;

//void callback(const MQTT::Publish& pub) {
// handle message arrived
//}

//PubSubClient client(wifiClient, "iot.eclipse.org");

//emoncoms
const char* host = "emoncms.org";
const char* nodeId   = "21";

//either define key here of create a config.h key and add it there
//const char* privateKey = "YOUR_EMONCMS_KEY";
#import "config.h"

ADC_MODE(ADC_VCC);

float h = 0;
float t = 0;
int vcc;

long startMills;

void sendData();

void setup(void)
{
  //ESP.eraseConfig();

startMills = millis();
  // start serial port
  Serial.begin(115200);

//-------------------

DEBUG_PRINT();

WiFiManager wifi;
  //wifi.resetSettings();
  
  wifi.setTimeout(120); //so if it restarts and router is not yet online, it keeps rebooting and retrying to connect
  
  if (!wifi.autoConnect("Cashula")) {
    DEBUG_PRINT("timeout - going to sleep");
    DEBUG_PRINT(millis() - startMills);

delay(200);
    //sleep and try again
    ESP.deepSleep(10 * 60 * 1000 * 1000);
    delay(1000);
  }

DEBUG_PRINT(millis() - startMills);
  //-------
 //setup hardware

}

void loop(void)
{

vcc = ESP.getVcc();//readvdd33();
  // original loop

DEBUG_PRINT(millis() - startMills);

DEBUG_PRINT("Requesting temperatures...");
  int acquireresult;
  
  //read twice as the first result is cached from last time. suggested by @chaeplin
  delay(2000);
  DHT.acquireAndWait(100);
  delay(2000);
  acquireresult = DHT.acquireAndWait(100);

if ( acquireresult == 0 ) {
    t = DHT.getCelsius();
    h = DHT.getHumidity();
    delay(10);
    sendData();
    DEBUG_PRINT("DONE");
  } else {
    t = h = 0;
    DEBUG_PRINT("Failed");

}
  
  /*h = dht.readHumidity();
  t = dht.readTemperature();

if (!isnan(h) && !isnan(t)) {
    delay(10);
    sendData();
  }*/

DEBUG_PRINT(millis() - startMills);
  DEBUG_PRINT("Going to sleep");
  delay(250);

ESP.deepSleep(5 * 60 * 1000 * 1000);
  //ESP.deepSleep(60 * 1000 * 1000);
  delay(1000);
}

void sendData() {
  DEBUG_PRINT("connecting to ");
  DEBUG_PRINT(host);

WiFiClient emoClient;

const int httpPort = 80;
  if (!emoClient.connect(host, httpPort)) {
    DEBUG_PRINT("connection failed");
    return;
  }

String json = "{temperature:";
  json += t;
  json += ",humidity:";
  json += h;  
  json += ",vcc:";
  json += vcc;
  json += "}";

String url = "/input/post.json?node=";
  url += nodeId;
  url += "&apikey=";
  url += privateKey;
  url += "&json=";
  url += json;

DEBUG_PRINT("Requesting URL: ");
  DEBUG_PRINT(url);

// This will send the request to the server
  emoClient.print(String("GET ") + url + " HTTP/1.1\r\n" +
                  "Host: " + host + "\r\n" +
                  "Connection: close\r\n\r\n");
  delay(10);

// Read all the lines of the reply from server and print them to Serial
  while (emoClient.available()) {
    String line = emoClient.readStringUntil('\r');
    DEBUG_PRINT(line);
  }

DEBUG_PRINT();
  DEBUG_PRINT("closing connection");
/*
  if (client.connected()) {
    DEBUG_PRINT("Sending mqtt: ");
    //DEBUG_PRINT(json);

if (client.publish(topic, (char*) json.c_str())) {
      DEBUG_PRINT("Publish ok");
    }
    else {
      DEBUG_PRINT("Publish failed");
    }
  }*/

}

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#include <ESP8266WiFi.h>

#include <WiFiClient.h>

#include <DNSServer.h>

#include <ESP8266WebServer.h>

#include <WiFiManager.h> //https://github.com/tzapu/WiFiManager

#include <PietteTech_DHT.h> //https://github.com/chaeplin/PietteTech_DHT-8266

//DHT22 config

#define DHTPIN 2 // what pin DHT is connected to

#define DHTTYPE DHT22 // DHT 11

//declaration

void dht_wrapper(); // must be declared before the lib initialization

// Lib instantiate

PietteTech_DHT DHT(DHTPIN, DHTTYPE, dht_wrapper);

// globals

bool bDHTstarted; // flag to indicate we started acquisition

// This wrapper is in charge of calling

// must be defined like this for the lib work

void dht_wrapper() {

DHT.isrCallback();

}

#define DEBUGPRINT

#ifdef DEBUGPRINT

#define DEBUG_PRINT(x) Serial.println (x)

#else

#define DEBUG_PRINT(x)

#endif

//#include <SimpleTimer.h> //http://playground.arduino.cc/Code/SimpleTimer || https://github.com/jfturcot/SimpleTimer

char* topic = "nodes/battery/temp";

char* hellotopic = "nodes/register";

//IPAddress server(192, 168, 10, 10);

//SimpleTimer timer;

String clientName;

WiFiClient wifiClient;

//void callback(const MQTT::Publish& pub) {

// handle message arrived

//}

//PubSubClient client(wifiClient, "iot.eclipse.org");

//emoncoms

const char* host = "emoncms.org";

const char* nodeId = "21";

//either define key here of create a config.h key and add it there

//const char* privateKey = "YOUR_EMONCMS_KEY";

#import "config.h"

ADC_MODE(ADC_VCC);

float h = 0;

float t = 0;

int vcc;

long startMills;

void sendData();

void setup(void)

{

//ESP.eraseConfig();

startMills = millis();

// start serial port

Serial.begin(115200);

//-------------------

DEBUG_PRINT();

WiFiManager wifi;

//wifi.resetSettings();

wifi.setTimeout(120); //so if it restarts and router is not yet online, it keeps rebooting and retrying to connect

if (!wifi.autoConnect("Cashula")) {

DEBUG_PRINT("timeout - going to sleep");

DEBUG_PRINT(millis() - startMills);

delay(200);

//sleep and try again

ESP.deepSleep(10 * 60 * 1000 * 1000);

delay(1000);

}

DEBUG_PRINT(millis() - startMills);

//-------

//setup hardware

}

void loop(void)

{

vcc = ESP.getVcc();//readvdd33();

// original loop

DEBUG_PRINT(millis() - startMills);

DEBUG_PRINT("Requesting temperatures...");

int acquireresult;

//read twice as the first result is cached from last time. suggested by @chaeplin

delay(2000);

DHT.acquireAndWait(100);

delay(2000);

acquireresult = DHT.acquireAndWait(100);

if ( acquireresult == 0 ) {

t = DHT.getCelsius();

h = DHT.getHumidity();

delay(10);

sendData();

DEBUG_PRINT("DONE");

} else {

t = h = 0;

DEBUG_PRINT("Failed");

}

/*h = dht.readHumidity();

t = dht.readTemperature();

if (!isnan(h) && !isnan(t)) {

delay(10);

sendData();

}*/

DEBUG_PRINT(millis() - startMills);

DEBUG_PRINT("Going to sleep");

delay(250);

ESP.deepSleep(5 * 60 * 1000 * 1000);

//ESP.deepSleep(60 * 1000 * 1000);

delay(1000);

}

void sendData() {

DEBUG_PRINT("connecting to ");

DEBUG_PRINT(host);

WiFiClient emoClient;

const int httpPort = 80;

if (!emoClient.connect(host, httpPort)) {

DEBUG_PRINT("connection failed");

return;

}

String json = "{temperature:";

json += t;

json += ",humidity:";

json += h;

json += ",vcc:";

json += vcc;

json += "}";

String url = "/input/post.json?node=";

url += nodeId;

url += "&apikey=";

url += privateKey;

url += "&json=";

url += json;

DEBUG_PRINT("Requesting URL: ");

DEBUG_PRINT(url);

// This will send the request to the server

emoClient.print(String("GET ") + url + " HTTP/1.1\r\n" +

"Host: " + host + "\r\n" +

"Connection: close\r\n\r\n");

delay(10);

// Read all the lines of the reply from server and print them to Serial

while (emoClient.available()) {

String line = emoClient.readStringUntil('\r');

DEBUG_PRINT(line);

}

DEBUG_PRINT();

DEBUG_PRINT("closing connection");

if (client.connected()) {

DEBUG_PRINT("Sending mqtt: ");

//DEBUG_PRINT(json);

if (client.publish(topic, (char*) json.c_str())) {

DEBUG_PRINT("Publish ok");

}

else {

DEBUG_PRINT("Publish failed");

}

}*/

}

Zoeken

ESP8266 WiFi Project – DHT22 DeepSleep naar EmonCMS (logger)

Arduino Code

Results