用StickC查看国外疫情数据
通过HTTP请求获取数据，对返回网页内容进行字符串查找和截取操作，实现数据的提取，将最终结果显示到屏幕上。#include <M5StickC.h>
#include <Arduino.h>
#include <SPI.h>
#include <WiFi.h>
#include <WiFiClientSecure.h>
#include <ArduinoHttpClient.h>
/*____Wifi _____________________*/
#define WIFI_SSID "M5-5G" // Enter your SSID here
#define WIFI_PASS "Office@888888" // Enter your WiFi password here
const int NetworkTimeout = 30*1000; //网络超时时间
const int NetworkDelay = 2000;
double vbat = 0.0;
int discharge, charge;
double temp = 0.0;
double bat_p = 0.0;
double bat_p2 = 0.0;
int status = WL_IDLE_STATUS;
int infected=0;
int recovered=0;
int deaths=0;
WiFiClientSecure client;
HttpClient http(client,"www.worldometers.info", 443);
uint8_t bat_3[] =
{ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xff,
0x00, 0x6e, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xdb, 0x00, 0xff,
0x00, 0xff, 0x00, 0x00, 0xff, 0x00, 0x00, 0xff, 0x00, 0x00, 0xff, 0xff, 0x00, 0x00,
0x00, 0xdb, 0x00, 0x00, 0xff, 0x00, 0x00, 0xff, 0x00, 0x00, 0xff, 0xff, 0x00, 0x00,
0x00, 0xff, 0x00, 0x00, 0xff, 0x00, 0x00, 0xff, 0x00, 0x00, 0xff, 0xff, 0x00, 0x00,
0x00, 0xff, 0x00, 0x00, 0xff, 0x00, 0x00, 0xff, 0x00, 0x00, 0xff, 0xff, 0x00, 0x00,
0x00, 0xb7, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00, 0xdb,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xff,
};
uint8_t bat_2[] =
{ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xff,
0x00, 0x6e, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xdb, 0x00, 0xff,
0x00, 0xff, 0x00, 0x00, 0xff, 0x00, 0x00, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00, 0x00,
0x00, 0xdb, 0x00, 0x00, 0xff, 0x00, 0x00, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00, 0x00,
0x00, 0xff, 0x00, 0x00, 0xff, 0x00, 0x00, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00, 0x00,
0x00, 0xff, 0x00, 0x00, 0xff, 0x00, 0x00, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00, 0x00,
0x00, 0xb7, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00, 0xdb,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xff,
};
uint8_t bat_1[] =
{ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xff,
0x00, 0x6e, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xdb, 0x00, 0xff,
0x00, 0xff, 0x00, 0x00, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00, 0x00,
0x00, 0xff, 0x00, 0x00, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00, 0x00,
0x00, 0xff, 0x00, 0x00, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00, 0x00,
0x00, 0xff, 0x00, 0x00, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00, 0x00,
0x00, 0xb7, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00, 0xdb,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xff,
};
void setup() {
//Initialize serial and wait for port to open:
Serial.begin(9600);
while (!Serial) {
; // wait for serial port to connect. Needed for native USB port only
}
M5.begin();
M5.Lcd.setRotation(3);
WiFi.mode(WIFI_STA);
WiFi.disconnect();
delay(100);
M5.Lcd.fillScreen(BLACK);
M5.Lcd.setCursor(20, 25);
M5.Lcd.setTextSize(2);
M5.Lcd.setTextColor(TFT_WHITE);
M5.Lcd.printf("Connecting");
WiFi.begin(WIFI_SSID, WIFI_PASS);
while (WiFi.status() != WL_CONNECTED) {
M5.Lcd.setCursor(20, 40);
M5.Lcd.setTextSize(1);
M5.Lcd.print("Please Wait...");
delay(500);
}
M5.Lcd.setCursor(15, 25);
M5.Lcd.setTextSize(2);
M5.Lcd.fillScreen(BLACK);
M5.Lcd.setTextColor(TFT_WHITE);
M5.Lcd.println("Connected");
IPAddress ip = WiFi.localIP();
M5.Lcd.setCursor(0, 25);
M5.Lcd.setTextSize(2);
M5.Lcd.fillScreen(BLACK);
M5.Lcd.println(ip);
M5.Lcd.fillScreen(BLACK);
M5.Lcd.setCursor(0, 25);
M5.Lcd.setTextColor(TFT_WHITE);
M5.Lcd.setTextSize(2);
M5.Lcd.println("Data Fetching");
}
void loop() {
check_country("India");
delay(2000);
check_country("Kuwait");
delay(2000);
check_country("Saudi-Arabia");
delay(2000);
check_country("Qatar");
delay(2000);
check_country("US");
delay(2000);
check_country("Italy");
delay(2000);
check_country("China");
delay(2000);
check_country("Spain");
delay(2000);
}
void draw_country_screen(String sCountry){
M5.Lcd.fillScreen(BLACK);
battery_status();
M5.Lcd.setRotation(3);
M5.Lcd.setTextSize(2);
M5.Lcd.setTextColor(ORANGE);
M5.Lcd.setCursor(0, 15);
M5.Lcd.print(sCountry + ":");
// infected
M5.Lcd.setTextColor(BLUE);
M5.Lcd.setTextSize(1);
M5.Lcd.setCursor(10, 35);
M5.Lcd.printf("Infected: %02d ",infected);
//Serial.print("Infected:");
//Serial.print(infected);
// recovered
M5.Lcd.setTextColor(GREEN);
M5.Lcd.setTextSize(1);
M5.Lcd.setCursor(10, 50);
M5.Lcd.printf("Recovered: %02d ",recovered);
//Serial.print("Recovered:");
//Serial.print(Recovered);
// deaths
M5.Lcd.setTextColor(RED);
M5.Lcd.setTextSize(1);
M5.Lcd.setCursor(10, 65);
M5.Lcd.printf("Deaths: %02d ",deaths);
//Serial.print("Deaths:");
//Serial.print(deaths);
}
void check_country(String sCountry) {
int err =0;
int readcounter = 0;
int read_value_step = 0;
String s1 = "";
String s2 = "";
err = http.get("/coronavirus/country/" + sCountry +"/"); //请求路径地址
if (err == 0)
{
//Serial.println("Requesting ok");
err = http.responseStatusCode(); //返回状态码
if (err >= 0)
{
unsigned long timeoutStart = millis(); //超时起始时间
char c;
while ( (http.connected() || http.available()) && //如果连接正常数据读取完毕并且没有超时
(!http.endOfBodyReached()) &&
((millis() - timeoutStart) < NetworkTimeout) )
{
if (http.available())// 读取接收字符进行拼接
{
c = http.read();
s2 = s2 + c;
if (readcounter < 300) {//每次读取300个字符
readcounter++;
} else {
readcounter = 0;
String tempString = "";
tempString.concat(s1);
tempString.concat(s2);
// check infected first
if (read_value_step == 0) { //查找"Coronavirus Cases:"
int place = tempString.indexOf("Coronavirus Cases:");
if ((place != -1) && (place < 350)) { //如果找到"Coronavirus Cases:"
read_value_step = 1;
s2 = tempString.substring(place + 15);//在此位置+15个字符进行截取
tempString = s2.substring(s2.indexOf("#aaa") + 6);//从#aaa后面的第6个字符开始进行截取
s1 = tempString.substring(0, (tempString.indexOf("</")));//提取</前的字符
s1.remove(s1.indexOf(","),1); //去掉","
//Serial.print("Coronavirus Cases: ");
//Serial.println(s1);
infected = s1.toInt(); //将字符转为数字
}
}
// check deaths
if (read_value_step == 1) {
int place = tempString.indexOf("Deaths:");
if ((place != -1) && (place < 350)) {
read_value_step = 2;
s2 = tempString.substring(place + 15);
tempString = s2.substring(s2.indexOf("<span>") + 6);
s1 = tempString.substring(0, (tempString.indexOf("</")));
s1.remove(s1.indexOf(","),1);
//Serial.print("Deaths: ");
//Serial.println(s1);
deaths = s1.toInt();
}
}
// check recovered
if (read_value_step == 2) {
int place = tempString.indexOf("Recovered:");
if ((place != -1) && (place < 350)) {
s2 = tempString.substring(place + 15);
tempString = s2.substring(s2.indexOf("<span>") + 6);
s1 = tempString.substring(0, (tempString.indexOf("</")));
s1.remove(s1.indexOf(","),1);
//Serial.print("Recovered: ");
//Serial.println(s1);
recovered = s1.toInt();
draw_country_screen(sCountry);
http.stop();
return;
}
}
s1 = s2;
s2 = "";
}
timeoutStart = millis();
}
else
{
delay(NetworkDelay);
}
}
}
else
{
//Serial.print("Getting response failed: ");
//Serial.println(err);
}
}
else
{
//Serial.print("Connect failed: ");
//Serial.println(err);
}
http.stop();
}
void printWiFiStatus() {
// print the SSID of the network you're attached to:
//Serial.print("SSID: ");
//Serial.println(WiFi.SSID());
// print your board's IP address:
IPAddress ip = WiFi.localIP();
//Serial.print("IP Address: ");
//Serial.println(ip);
// print the received signal strength:
long rssi = WiFi.RSSI();
//Serial.print("signal strength (RSSI):");
//Serial.print(rssi);
//Serial.println(" dBm");
}
void battery_status()
{
vbat = M5.Axp.GetVbatData() * 1.1 / 1000;
discharge = M5.Axp.GetIdischargeData() / 2;
if (vbat >= 4)
{
M5.Lcd.pushImage(145, 1, 14, 8, bat_3);
}
else if (vbat >= 3.7)
{
M5.Lcd.pushImage(145, 1, 14, 8, bat_2);
}
else if (vbat < 3.7)
{
M5.Lcd.pushImage(145, 1, 14, 8, bat_1);
}
else
{}
// M5.Lcd.setTextColor(TFT_YELLOW);
// M5.Lcd.setCursor(140, 12);
// M5.Lcd.setTextSize(1);
// M5.Lcd.println(discharge);
}
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