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#include <LowPower.h> | |
#include <SoftwareSerial.h> | |
#include "DHT.h" | |
#include <avr/wdt.h> | |
#include <avr/sleep.h> | |
#include <avr/pgmspace.h> | |
#include <stdlib.h> | |
///////////////////////////////// | |
#define sensorId "30" | |
///////////////////////////////// | |
boolean chipGood = false; | |
boolean debugOutputNeeded = false; | |
#define SSID "" | |
#define PASS "" | |
#define DST_IP "192.168.1.13" //baidu.com | |
#define DHTPIN 2 // what pin we're connected to | |
#define DHTTYPE DHT22 | |
DHT dht(DHTPIN, DHTTYPE); | |
void setup() | |
{ | |
pinMode(13, OUTPUT); | |
pinMode(12, OUTPUT); | |
pinMode(8, OUTPUT); | |
pinMode(3, OUTPUT); | |
turnSensorOff(true); | |
turnChipOff(false); | |
digitalWrite(12, HIGH); | |
digitalWrite(13, HIGH); | |
delay(700); | |
digitalWrite(13, LOW); | |
digitalWrite(12, LOW); | |
Serial.begin(9600); | |
Serial.setTimeout(5000); | |
while(chipGood == false){ | |
Serial.println("AT+RST"); | |
delay(1000); | |
if(Serial.find("ready")) | |
{ | |
chipGood = true; | |
} | |
else | |
{ | |
turnChipOff(true); | |
turnChipOff(false); | |
delay(100); | |
} | |
} | |
delay(500); | |
//connect to the wifi | |
boolean connected=false; | |
for(int i=0;i<5;i++) | |
{ | |
if(connectWiFi()) | |
{ | |
connected = true; | |
break; | |
} | |
} | |
if (!connected){ | |
while(1); | |
} else { | |
digitalWrite(12, HIGH); | |
delay(300); | |
digitalWrite(12, LOW); | |
delay(300); | |
digitalWrite(12, HIGH); | |
delay(300); | |
digitalWrite(12, LOW); | |
delay(300); | |
digitalWrite(12, HIGH); | |
delay(300); | |
digitalWrite(12, LOW); | |
turnSensorOff(false); | |
} | |
delay(2000); | |
Serial.println("AT+CIFSR"); | |
while (Serial.available()){ | |
Serial.read(); | |
} | |
Serial.println("AT+CIPMUX=0"); | |
} | |
void sleep1() | |
{ | |
turnChipOff(true); | |
for (int i = 0; i < 75; i++) { // 75 = 10min | |
LowPower.powerDown(SLEEP_8S, ADC_OFF, BOD_OFF); | |
} | |
turnChipOff(false); | |
} | |
//////////////////////////////////////////// | |
void loop() | |
//////////////////////////////////////////// | |
{ | |
turnSensorOff(false); | |
delay(300); | |
String temperatureData = readTemp(); | |
turnSensorOff(true); | |
int temperatureDataStringLength = temperatureData.length(); | |
bool success = false; | |
if (temperatureDataStringLength > 1){ | |
success = sendStuff(temperatureData); | |
} | |
if (success){ | |
sleep1(); | |
} else { | |
delay(1000); | |
} | |
} | |
boolean sendStuff(String temperatureData) | |
{ | |
String cmd = "AT+CIPSTART=\"TCP\",\""; | |
cmd += DST_IP; | |
cmd += "\",8080"; | |
Serial.println(cmd); | |
if(Serial.find("Error")){ | |
return false; | |
} | |
cmd = "GET /update.php"+temperatureData; | |
cmd += " HTTP/1.0\r\nHost: "; | |
cmd += DST_IP; | |
cmd += "\r\n\r\n"; | |
Serial.print("AT+CIPSEND="); | |
Serial.println(cmd.length()); | |
if(Serial.find(">")) | |
{ | |
digitalWrite(12, HIGH); | |
delay(100); | |
digitalWrite(12, LOW); | |
}else | |
{ | |
Serial.println("AT+CIPCLOSE"); | |
delay(500); | |
return false; | |
} | |
Serial.print(cmd); | |
delay(500); | |
return true; | |
} | |
boolean connectWiFi() | |
{ | |
Serial.println("AT+CWMODE=1"); | |
String cmd="AT+CWJAP=\""; | |
cmd+=SSID; | |
cmd+="\",\""; | |
cmd+=PASS; | |
cmd+="\""; | |
Serial.println(cmd); | |
delay(2000); | |
if(Serial.find("OK")) | |
{ | |
digitalWrite(7, HIGH); | |
return true; | |
}else | |
{ | |
digitalWrite(7, LOW); | |
return false; | |
} | |
} | |
void turnChipOff(boolean turnOff) | |
{ | |
if (turnOff){ | |
digitalWrite(8, LOW); | |
delay(100); | |
} else { | |
digitalWrite(8, HIGH); | |
delay(100); | |
} | |
} | |
void turnSensorOff(boolean turnOff) | |
{ | |
if (turnOff){ | |
digitalWrite(3, LOW); | |
delay(100); | |
} else { | |
digitalWrite(3, HIGH); | |
delay(2400); | |
} | |
} | |
String readTemp () | |
{ | |
char tBuff[6]; | |
char hBuff[6]; | |
float h = dht.readHumidity(); | |
float t = dht.readTemperature(); | |
if ((!isnan(t) && !isnan(h)) && h > 0 && t > 0) { | |
String tString = dtostrf(t, 2, 2, tBuff); | |
String hString = dtostrf(h, 2, 2, hBuff); | |
String sId = String(sensorId); | |
String voltage = String(readVcc()); | |
String outString = "?sid="+sId+"&temperature="+tString+"&humidity="+hString+"&voltage="+voltage; | |
return outString; | |
// Serial.println("data: "+ outString); | |
} else { | |
digitalWrite(13, HIGH); | |
delay(500); | |
digitalWrite(13, LOW); | |
return ""; | |
} | |
} | |
//----------------------------------------------------------------------------- | |
//Code from https://code.google.com/p/tinkerit/wiki/SecretVoltmeter | |
//----------------------------------------------------------------------------- | |
int readVcc() { | |
long result; | |
// Read 1.1V reference against AVcc | |
ADMUX = _BV(REFS0) | _BV(MUX3) | _BV(MUX2) | _BV(MUX1); | |
delay(2); // Wait for Vref to settle | |
ADCSRA |= _BV(ADSC); // Convert | |
while (bit_is_set(ADCSRA,ADSC)); | |
result = ADCL; | |
result |= ADCH<<8; | |
result = 1126400L / result; // Back-calculate AVcc in mV | |
return (int)result; | |
} |
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