潜水浮出，分享个小东西[室内温度推送+实时显示+网络时钟]
潜水太久，我还是给大家分享个东西功能：
1. 室内温度实时推送到yeelink
2. 从网络反馈信息可以了解网络时钟，现在几点了
3. I2C LCD 网络显示当前信息状态
4. 内置看门狗，以免死机或者路由器无响应
5. 以上纯属YY，当然还是有点实用价值
分享代码
#include <SPI.h>
#include <Ethernet.h>
#include <math.h>
#include <Wire.h>
#include <LiquidCrystal_I2C.h>
#include <OneWire.h>
#include <DallasTemperature.h>
#include <avr/wdt.h>
// for yeelink api
#define APIKEY "706bfc67907daa044b5e95ec283caed3" // replace your yeelink api key here
#define DEVICEID 1419 // replace your device ID
#define SENSORID 1809 // replace your sensor ID
#define ONE_WIRE_BUS 9
char str;
OneWire oneWire(ONE_WIRE_BUS);
LiquidCrystal_I2C lcd(0x27,20,4);// set the LCD address to 0x27 for a 16 chars and 2 line display
DallasTemperature sensors(&oneWire);
// assign a MAC address for the ethernet controller.
byte mac[] = { 0x00, 0x1D, 0x72, 0x82, 0x35, 0x9D};
// initialize the library instance:
EthernetClient client;
//IPAddress ip(192,168,1,130);
char server[] = "api.yeelink.net"; // name address for yeelink API
unsigned long lastConnectionTime = 0; // last time you connected to the server, in milliseconds
boolean lastConnected = false; // state of the connection last time through the main loop
const unsigned long postingInterval = 20*100; // delay between 2 datapoints, 30s
void setup() {
lcd.init(); // initialize the lcd
sensors.begin();
lcd.backlight();
lcd.clear();
// start serial port:
Serial.begin(57600);
lcd.setCursor(0, 0);
lcd.print("*LINK THE NETWORK*");
sensors.requestTemperatures();
lcd.setCursor(0, 1);
lcd.print("Please into RJ45");
lcd.setCursor(0, 2);
lcd.print("====================");
lcd.setCursor(0, 3);
lcd.print("Temperatures=");
lcd.setCursor(14, 3);
lcd.print(sensors.getTempCByIndex(0));
delay(2000);
lcd.clear();
lcd.setCursor(0, 0);
lcd.print("*Status of DHCP*");
// start the Ethernet connection with DHCP:
if (Ethernet.begin(mac) == 0) {
Serial.println("Failed to configure Ethernet using DHCP");
for(;;)
lcd.setCursor(3, 1);
lcd.print("Link Without HUB");
}
else {
Serial.println("Ethernet configuration OK");
lcd.setCursor(3, 1);
lcd.print("Link With HUB");
}
delay(1000);
lcd.clear();
wdt_enable(WDTO_8S);
}
void loop() {
// if there's incoming data from the net connection.
// send it out the serial port.This is for debugging
// purposes only:
lcd.clear();
int ROW=0;
int num=0;
delay(50);
lcd.print("LOGIN INTELNET...");
delay(50);
lcd.setCursor(0, 0);
while (client.available()) {
char str = client.read();
wdt_reset();
if(client.available()){num++;}
if((num%20==0&&num>15)){lcd.setCursor(0, ROW+=1);}
if(ROW>3){delay(800);ROW=0;lcd.clear();}
if(str=='\n'||str=='\r'){str=' ';}
lcd.print(str);
Serial.print(str);
Serial.print("; = ");
Serial.print(str,16);
delay(15);
}
if (client.available()){lcd.setCursor(0, 0);lcd.clear();}
// if there's no net connection, but there was one last time
// through the loop, then stop the client:
if (!client.connected() && lastConnected) {
lcd.clear();
Serial.println();
lcd.setCursor(3,1);
Serial.println("disconnecting.");
lcd.print("disconnecting.");
client.stop();
delay(200);
wdt_reset();
}
// if you're not connected, and ten seconds have passed since
// your last connection, then connect again and send data:
if(!client.connected() && (millis() - lastConnectionTime > postingInterval)) {
// read sensor data, replace with your code
lcd.setCursor(0, 0);
lcd.print("LOGIN INTELNET=");
lcd.setCursor(0, 1);
lcd.print("Connecting");
lcd.setCursor(0, 2);
lcd.print("Server=Sent:");
lcd.setCursor(13, 2);
lcd.print(sensors.getTempCByIndex(0));
lcd.setCursor(18, 2);
lcd.print("'C");
float sensorReading = readLightSensor();
//send data to server
sendData(sensorReading);
delay(50);
}
// store the state of the connection for next time through
// the loop:
lastConnected = client.connected();
}
// this method makes a HTTP connection to the server:
void sendData(int thisData) {
// if there's a successful connection:
if (client.connect(server, 80)) {
lcd.clear();
lcd.setCursor(0, 0);
lcd.print("connecting...");
Serial.println("connecting...");
// send the HTTP PUT request:
client.print("POST /v1.0/device/");
client.print(DEVICEID);
client.print("/sensor/");
client.print(SENSORID);
client.print("/datapoints");
client.println(" HTTP/1.1");
client.println("Host: api.yeelink.net");
client.print("Accept: *");
client.print("/");
client.println("*");
client.print("U-ApiKey: ");
client.println(APIKEY);
client.print("Content-Length: ");
lcd.setCursor(0, 1);
lcd.print("Length: ");
// calculate the length of the sensor reading in bytes:
// 8 bytes for {"value":} + number of digits of the data:
int thisLength = 10 + getLength(thisData);
lcd.setCursor(9, 1);
client.println(thisLength);
lcd.print(thisLength);
client.println("Content-Type: application/x-www-form-urlencoded");
lcd.setCursor(2, 2);
lcd.print("Connection: close");
client.println("Connection: close");
client.println();
lcd.setCursor(1, 3);
lcd.print("Vaule=");
lcd.setCursor(7, 3);
// here's the actual content of the PUT request:
client.print("{\"value\":");
client.print(thisData);
lcd.print(sensors.getTempCByIndex(0));
client.println("}");
delay(400);
}
else {
// if you couldn't make a connection:
lcd.clear();
lcd.setCursor(0, 0);
lcd.print("connection failed");
Serial.println("connection failed");
Serial.println();
lcd.setCursor(0, 1);
lcd.print("disconnecting.");
Serial.println("disconnecting.");
lcd.setCursor(0, 2);
lcd.print("client.stop()");
client.stop();
delay(500);
}
// note the time that the connection was made or attempted:
lastConnectionTime = millis();
}
// This method calculates the number of digits in the
// sensor reading.Since each digit of the ASCII decimal
// representation is a byte, the number of digits equals
// the number of bytes:
int getLength(int someValue) {
// there's at least one byte:
int digits = 1;
// continually divide the value by ten,
// adding one to the digit count for each
// time you divide, until you're at 0:
int dividend = someValue /10;
while (dividend > 0) {
dividend = dividend /10;
digits++;
}
// return the number of digits:
return digits;
}
///////////////////////////////////////////////////////////////////////////
// get data from light sensor
// you can replace this code for your sensor
float readLightSensor()
{
float val=0;
val=sensors.getTempCByIndex(0)*100;
sensors.requestTemperatures();
//lcd.print(sensors.getTempCByIndex(0));
Serial.print("Sensor value is: ");
Serial.println(sensors.getTempCByIndex(0));
return val;
}
你连加密串都放出来了 大公无私啊 支持一下！
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