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WebServer
使用 ESP8266WebServer.h 而不是自己寫
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#include <ESP8266WiFi.h> #include <WiFiClient.h> #include <ESP8266WebServer.h> IPAddress ip(192,168,1,81); // choose IP address IPAddress subnet(255,255,255,0); ESP8266WebServer server(80); void handleRoot() { String page = "<!DOCTYPE html>\n"; page += "<html>\n<body>\n<h1>Some heading</h1><br>Generated by ESP8266\n</body>\n</html>"; server.send(200, "text/html", page); } // what to do when accessed through http://ip_address/something_undefined void handleNotFound(){ String message = "File not found\n\n"; message += "URI: "; message += server.uri(); message += "\nMethod: "; message += (server.method() == HTTP_GET)?"GET":"POST"; message += "\nArguments: "; message += server.args(); message += "\n"; for (uint8_t i=0; i<server.args(); i++){ message += " " + server.argName(i) + ": " + server.arg(i) + "\n"; } server.send(404, "text/plain", message); } void setup(void){ Serial.begin(74880); // so you can see debug messages automatically sent by ESP8266 WiFi.mode(WIFI_AP); WiFi.softAPConfig(ip, ip, subnet); // declared as: bool softAPConfig (IPAddress local_ip, IPAddress gateway, IPAddress subnet) WiFi.softAP("SOME_NAME", "password", 7); // network name, network password, wifi channel IPAddress myIP = WiFi.softAPIP(); Serial.println(); Serial.print("AP IP address: "); Serial.println(myIP); server.on("/", handleRoot); // what to do when accessed through browser using http://IP_address // what to do when accessed through http://ip_address/test server.on("/test", [](){ server.send(200, "text/plain", "This is another page"); }); server.on("/sa/1", [](){ // ... <-- put here the code for NeoPixel = on server.send(200, "text/html", "NeoPixel is now on"); }); server.on("/sa/0", [](){ // ... <-- put here the code for NeoPixel = off server.send(200, "text/html", "NeoPixel is now off"); }); server.onNotFound(handleNotFound); server.begin(); Serial.println("HTTP server started..."); } void loop(void){ server.handleClient(); } |
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URL 的 $_GET()
一般來說使用 handleSpecificArg() 是比較常用的
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void handleGenericArgs() { String message = ""; message += server.arg(0) + "\n"; String rs_message = getValue(message, ','); message += rs_message; server.send(200, "text / plain", message); //Response to the HTTP request } // void handleSpecificArg() { String message = ""; if (server.arg("Temperature") == "") { //Parameter not found message = "Temperature Argument not found"; } else { //Parameter found message = "Temperature Argument = "; message += server.arg("Temperature"); //Gets the value of the query parameter } server.send(200, "text / plain", message); //Returns the HTTP response } server.on("/rs", handleGenericArgs); |
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應用
有了 WiFi AP 也有了取得網址變數的方法，接下來就可以設計應用場景網址的變數使用。例如 http://192.168.2.1/url?led=on&light=1 ，可以表示開啟 led 以及亮 1 秒
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