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#include <ArduinoJson.h>
#include <ESP8266WiFi.h>
#include <WiFiClientSecure.h>
#include <LiquidCrystal_I2C.h>
#include <Wire.h>
LiquidCrystal_I2C lcd(0x27, 20, 4);
const char* ssid = ""; //WLAN-Name
const char* password = ""; //WLAN-Passwort
const char* host = "api.openweathermap.org";
const char* location = "Köln";
const char* apikey = ""; // API-Key vom openweathermap.org Account
const int httpsPort = 443;
// Use web browser to view and copy
// SHA1 fingerprint of the certificate
const char* fingerprint = "";
byte degree[8] = { // Grad-Zeichen °
B00010,
B00101,
B00010,
B00000,
B00000,
B00000,
B00000,
};
void write(LiquidCrystal_I2C lcd, String s) {
write(lcd, s.c_str());
}
void writeLn(LiquidCrystal_I2C lcd, String s, int ln) {
writeLn(lcd, s.c_str(), ln);
}
void writeLn(LiquidCrystal_I2C lcd, const char* s, int ln) {
int i = 0;
while (*s != '\0' && i < 20) {
delay(10);
lcd.setCursor(i, ln);
lcd.write(*s);
++s;
yield();
i++;
}
}
void writeLnRest(LiquidCrystal_I2C lcd, String s, int ln, int st) {
writeLnRest(lcd, s.c_str(),ln,st);
}
void writeLnRest(LiquidCrystal_I2C lcd, const char* s, int ln, int st) {
int i = st;
while (*s != '\0' && i < 20) {
delay(10);
lcd.setCursor(i, ln);
lcd.write(*s);
++s; //you can increment pointers without assigning an address to them
yield();
i++;
}
}
void write(LiquidCrystal_I2C lcd, const char* s) {
int i = 0;
int j = 0;
while (*s != '\0') {
delay(10);
lcd.setCursor(i, j);
lcd.write(*s);
++s; //you can increment pointers without assigning an address to them
yield();
i++;
if (i > 19) {
j++;
i = 0;
if (j > 3)
j = 0;
}
}
}
void setup() {
lcd.begin(0, 2);
lcd.backlight();
lcd.createChar(1, degree);
Serial.begin(9600);
Serial.println();
Serial.print("connecting to ");
Serial.println(ssid);
writeLn(lcd, "connecting to:", 0);
writeLn(lcd, String(ssid), 1);
WiFi.mode(WIFI_STA);
WiFi.begin(ssid, password);
while (WiFi.status() != WL_CONNECTED) {
delay(500);
Serial.print(".");
}
lcd.clear();
writeLn(lcd, "WiFi connected.", 0);
writeLn(lcd, "IP addresse: ", 1);
IPAddress ip = WiFi.localIP();
writeLn(lcd, String(ip[0]) + "." + String(ip[1]) + "." + String(ip[2]) + "." + String(ip[3]), 2);
delay(100);
Serial.println("");
Serial.println("WiFi connected");
Serial.println("IP address: ");
Serial.println(WiFi.localIP());
}
void loop() {
// Use WiFiClientSecure class to create TLS connection
WiFiClientSecure client;
Serial.print("connecting to ");
Serial.println(host);
if (!client.connect(host, httpsPort)) {
Serial.println("connection failed");
return;
}
if (client.verify(fingerprint, host)) {
Serial.println("certificate matches");
} else {
Serial.println("certificate doesn't match");
}
String url = "/data/2.5/weather?q="+location+"&APPID="+apikey+"&units=metric&lang=de";
Serial.print("requesting URL: ");
Serial.println(url);
client.print(String("GET ") + url + " HTTP/1.1\r\n" +
"Host: " + host + "\r\n" +
"User-Agent: BuildFailureDetectorESP8266\r\n" +
"Connection: close\r\n\r\n");
Serial.println("request sent");
while (client.connected()) {
String line = client.readStringUntil('\n');
if (line == "\r") {
Serial.println("headers received");
break;
}
}
String line = client.readStringUntil('\n');
if (line.startsWith("{\"state\":\"success\"")) {
Serial.println("esp8266/Arduino CI successfull!");
} else {
Serial.println("esp8266/Arduino CI has failed");
}
Serial.println("reply was:");
Serial.println("==========");
Serial.println(line);
yield();
StaticJsonBuffer<1024> jsonBuffer;
JsonObject& root = jsonBuffer.parseObject(String(line));
write(lcd, String(line).c_str());
yield();
lcd.clear();
String temp = root["main"]["temp"].as<String>();
String pressure = root["main"]["pressure"].as<String>();
String wind = root["wind"]["speed"].as<String>();
String weather = root["weather"][0]["description"].as<String>();
Serial.println(root["main"]["pressure"].as<float>());
Serial.println(temp);
writeLn(lcd, "Temp: " + temp + "\1C", 0);
writeLn(lcd, "Druck: " + pressure, 1);
writeLn(lcd, "Wind: " + wind, 2);
writeLn(lcd, "Wetter: ", 3);
yield();
Serial.println("==========");
Serial.println("closing connection");
int c=0;
int p=0;
while(c<60000) {
String weather = root["weather"][p++]["description"].as<String>();
if(weather=="") {
p=0;
weather = root["weather"][p++]["description"].as<String>();
}
lcd.setCursor(8,3);
writeLnRest(lcd," ",3,8);
lcd.setCursor(8,3);
writeLnRest(lcd,weather,3,8);
delay(5000);
c+=5000;
}
}
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