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// CPU 80MHZ, FLASH 4M/1M
/*
*** Sample using esp-01, D16 is connected to RST
*** If DHT22 is powered by a gpio( VCC of DHT22 is connected to a gpio) and OUTPUT of DHT22 is connected to D2, boot will fail.
*** Power off ----> D2 is in LOW( == DHT22 is in LOW) ==> SDIO boot mode.
Temperature and humidity values are each read out the results of the last measurement.
For real-time data that need continuous read twice, we recommend repeatedly to read sensors,
and each read sensor interval is greater than 2 seconds to obtain accuratethe data.
--> read twice !!!!
--> sampling period : 2 sec
3.3V - 5.5V is needed, min is 3.3V
So if DHT22 is powered by battery(2 * AA), boost module is needed.
http://www.ebay.com/itm/2-in-1-DC-DC-Step-Down-Step-Up-Converter-1-8V-5V-3V-3-7V-to-3-3V-Power-Module-/271873956073
*/
#include <ESP8266WiFi.h>
#include <PietteTech_DHT.h>
// ap setting
#include "config.h"
/* contents of congi.h should be
* const char* privateKey = "EMONCMSKEY";
* //emoncoms
* const char* host = "emoncms.org";
* const char* nodeId = "21";
*/
extern "C" {
#include "user_interface.h"
}
// to check battery voltage using internal adc
ADC_MODE(ADC_VCC);
// rtc
#define RTC_MAGIC 1234
typedef struct _tagPoint {
uint32 magic;
uint32 salt;
uint32 wifi_err_cnt;
uint32 temp_err_cnt;
uint32 report_cnt;
} RTC_TEST;
RTC_TEST rtc_mem_test;
float t, h;
#include <DNSServer.h>
#include <ESP8266WebServer.h>
#include <WiFiManager.h> //https://github.com/tzapu/WiFiManager
//
int vdd;
WiFiClient wifiClient;
// system defines
#define DHTTYPE DHT22 // Sensor type DHT11/21/22/AM2301/AM2302
#define DHTPIN 2 // Digital pin for communications
#define REPORT_INTERVAL 300 // in sec
#define DHT_SMAPLING_INTERVAL 2100 // in msec
#define DHT_GND_PIN 0 // to control npn tr
unsigned long startMills, checkMillis;
bool bDHTstarted;
int acquirestatus;
int loopcount;
void ICACHE_RAM_ATTR dht_wrapper();
PietteTech_DHT DHT(DHTPIN, DHTTYPE, dht_wrapper);
void goingtosleep() {
pinMode(DHTPIN, OUTPUT);
digitalWrite(DHTPIN, LOW); //- See more at: http://www.esp8266.com/viewtopic.php?p=43435#p43435
digitalWrite(DHT_GND_PIN, HIGH);
delay(100);
system_rtc_mem_write(100, &rtc_mem_test, sizeof(rtc_mem_test));
ESP.deepSleep((REPORT_INTERVAL * 1000 * 1000 ), WAKE_RF_DEFAULT);
yield();
}
void dorestart() {
pinMode(DHTPIN, OUTPUT);
digitalWrite(DHTPIN, LOW); //- See more at: http://www.esp8266.com/viewtopic.php?p=43435#p43435
digitalWrite(DHT_GND_PIN, HIGH);
delay(100);
system_rtc_mem_write(100, &rtc_mem_test, sizeof(rtc_mem_test));
ESP.restart();
yield();
}
void rtc_check() {
// system_rtc_mem_read(64... not work, use > 64
system_rtc_mem_read(100, &rtc_mem_test, sizeof(rtc_mem_test));
if (rtc_mem_test.magic != RTC_MAGIC) {
rtc_mem_test.magic = RTC_MAGIC;
rtc_mem_test.salt = 0;
rtc_mem_test.wifi_err_cnt = 0;
rtc_mem_test.temp_err_cnt = 0;
rtc_mem_test.report_cnt = 0;
}
rtc_mem_test.salt++;
}
void ICACHE_RAM_ATTR dht_wrapper() {
DHT.isrCallback();
}
void wifi_connect() {
WiFiManager wifiManager;
wifiManager.setTimeout(120);
if (!wifiManager.autoConnect("Cashula")) {
rtc_mem_test.wifi_err_cnt++;
goingtosleep();
}
}
void sendData() {
Serial.println("connecting to ");
Serial.println(host);
WiFiClient emoClient;
const int httpPort = 80;
if (!emoClient.connect(host, httpPort)) {
Serial.println("connection failed");
return;
}
String json = "{temperature:";
json += t;
json += ",humidity:";
json += h;
json += ",vcc:";
json += vdd;
json += "}";
String url = "/input/post.json?node=";
url += nodeId;
url += "&apikey=";
url += privateKey;
url += "&json=";
url += json;
Serial.println("Requesting URL: ");
Serial.println(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');
Serial.println(line);
}
Serial.println();
Serial.println("closing connection");
}
void setup() {
Serial.begin(115200);
Serial.println("");
Serial.println("Setup started");
rtc_check();
vdd = ESP.getVcc() * 0.96;
acquirestatus = loopcount = 0;
pinMode(DHT_GND_PIN, OUTPUT);
digitalWrite(DHT_GND_PIN, LOW);
Serial.println("wifi on");
if (WiFi.status() != WL_CONNECTED) {
wifi_connect();
}
Serial.println("wifi connected");
bDHTstarted = false;
startMills = checkMillis = millis();
}
void loop() {
if ( loopcount < 2 ) {
if (bDHTstarted) {
acquirestatus = DHT.acquiring();
if (!acquirestatus) {
Serial.println("dht started");
if (DHT.getStatus() != 0) {
rtc_mem_test.temp_err_cnt++;
dorestart();
//goingtosleep();
}
bDHTstarted = false;
loopcount++;
}
}
if ((millis() - checkMillis) > DHT_SMAPLING_INTERVAL ) {
checkMillis = millis();
if (acquirestatus == 1) {
DHT.reset();
}
if (!bDHTstarted) {
DHT.acquire();
bDHTstarted = true;
Serial.println("starting dht");
}
}
} else {
Serial.println("reporting -->");
//printEdgeTiming(&DHT);
t = DHT.getCelsius();
h = DHT.getHumidity();
sendData();
Serial.println("reporting done --> ");
Serial.println("going to sleep --> ");
goingtosleep();
}
if ((millis() - startMills) > 25000) {
Serial.println("timed out");
goingtosleep();
}
}
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