當你有需要用GET法丟資料給某Server時，以下程式是個很好的範例程式
1.當你的目標是一般的ip或 http:// 開頭的網站時
#include <Arduino.h>
#include <ESP8266WiFi.h> // 提供Wi-Fi功能的程式庫
#include <ESP8266HTTPClient.h>
#include <ESP8266WiFiMulti.h>
////////////////////////////
#define SSID "tomorrows"
#define PASSWORD "----"
#define host "192.168.1.57:8080"
////////////////////////////
ESP8266WiFiMulti WiFiMulti;
WiFiServer server(8080); // 宣告網站伺服器物件與埠號
const int httpPort = 8080;
unsigned long t1,t2;
int i=0;
void data_to_web(String data3, String data4){
String url = "http://";
url+=host;
url+="/";
url+=data3;
url+=",";
url+=data4;
// This will send the request to the server
if((WiFiMulti.run() == WL_CONNECTED)) {
HTTPClient http;
http.begin(url);
int httpCode = http.GET();
if(httpCode > 0) {
if(httpCode == HTTP_CODE_OK) {
String payload = http.getString(); }
} else {}
http.end(); }}
void setup() {
Serial.begin(9600);
WiFiMulti.addAP(SSID, PASSWORD);
}
void loop(){
i++;
data_to_web(String(123),String(i));
delay(1000);
}
2.上丟Node-red (基本上也是丟給某ip)
#include <Arduino.h>
#include <ESP8266WiFi.h> // 提供Wi-Fi功能的程式庫
#include <ESP8266HTTPClient.h>
#include <ESP8266WiFiMulti.h>
////////////////////////////
#define SSID "tomorrows"
#define PASSWORD "------"
#define host "192.168.1.155:1880"
////////////////////////////
ESP8266WiFiMulti WiFiMulti;
WiFiServer server(1880); // 宣告網站伺服器物件與埠號
const int httpPort = 1880;
unsigned long t1,t2;
int i=0;
void data_to_web(String data3){
String url = "http://";
url+=host;
url+="/esp8266_1?data=";
url+=data3;
// This will send the request to the server
if((WiFiMulti.run() == WL_CONNECTED)) {
HTTPClient http;
http.begin(url);
int httpCode = http.GET();
if(httpCode > 0) {
if(httpCode == HTTP_CODE_OK) {
String payload = http.getString(); }
} else {}
http.end(); }}
void setup() {
Serial.begin(9600);
WiFiMulti.addAP(SSID, PASSWORD);
}
void loop(){
i++;
if(i>127){
i= -55;
}
data_to_web(String(i));
delay(1000);
}
3.當你需要丟資料給https:// (例如Google Apps Script 連動 Google sheet)
函式庫下載 HTTPSRedirect
#include "ESP8266WiFi.h"
#include "HTTPSRedirect.h"
const char* ssid = "填入Wifi SSID";
const char* password = "填入Wifi 密碼";
const char* host = "script.google.com";
const char *GScriptId = "AKfycbx7ni19fQc1Gr6CCGjDKiSXQ9W2JKYloSodKv7yNP4df8jFWZMU"; // Google script ID*(請見後方註解)
const int httpsPort = 443;
int i = 0;
HTTPSRedirect* client ;
void setup() {
Serial.begin(115200);
Serial.print("Connecting to wifi: ");
Serial.println(ssid);
WiFi.begin(ssid, password);
while (WiFi.status() != WL_CONNECTED) {
delay(500);
Serial.print(".");
}
Serial.println("");
Serial.println("WiFi connected");
Serial.println("IP address: ");
Serial.println(WiFi.localIP());
client = new HTTPSRedirect(httpsPort);
client->setPrintResponseBody(true);
client->setContentTypeHeader("application/json");
client->connect(host, httpsPort);
Serial.print("Connecting to ");
Serial.println(host);
}
void loop() {
i++;
String url3 = String("/macros/s/") + GScriptId + "/exec?data=";
url3 += i; //你要傳送的第一筆資料
url3 += ",";
url3 += 2*i; //你要傳送的第二筆資料
Serial.println("GET Data");
if (client->GET(url3, host)){
Serial.println("GET SUCCESS");
}
delay(4000);
}