2015-09-30 17:33:21 +02:00
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/*
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* This sketch demonstrates how to set up a simple HTTP-like server.
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* The server will set a GPIO pin depending on the request
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* http://server_ip/gpioX/0 will set the GPIOX low,
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* http://server_ip/gpioX/1 will set the GPIOX high,
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2015-10-01 01:07:11 +02:00
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* http://server_ip/gpioX will return GPIOX value,
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* http://server_ip/mode/gpioX/Y will set the GPIOX mode to Y (with Y in 0=INPUT, 1=OUTPUT, 2=INPUT_PULLUP),
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2015-09-30 17:33:21 +02:00
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* server_ip is the IP address of the ESP8266 module, will be
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* printed to Serial when the module is connected.
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*/
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#include <ESP8266WiFi.h>
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#define URL_GPIO "/gpio"
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2015-10-01 01:06:19 +02:00
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#define URL_MODE "/mode"
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2015-09-30 17:33:21 +02:00
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const char* ssid = "freebox_sarah";
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const char* password = "password";
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// Create an instance of the server
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// specify the port to listen on as an argument
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WiFiServer server(80);
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2015-10-01 01:06:19 +02:00
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enum requestType {INVALID, GET_VALUE, SET_VALUE, SET_MODE};
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int mode[] = {INPUT, OUTPUT, INPUT_PULLUP};
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2015-09-30 17:33:21 +02:00
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struct request {
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int gpio;
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int value;
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2015-10-01 01:06:19 +02:00
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requestType type;
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2015-09-30 17:33:21 +02:00
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};
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int parseRequest(String &raw, struct request &req ) {
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int index, end;
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String url;
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2015-10-01 01:06:19 +02:00
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index = raw.indexOf(URL_MODE);
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if ( index != -1) {
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String subUrl = raw.substring(index + strlen(URL_MODE));
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if (parseRequest(subUrl, req) >= 0) {
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if ( req.value >= 0 && req.value <= 2) {
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req.type = SET_MODE;
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req.value = mode[req.value];
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return 0;
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} else
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goto invalid;
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} else
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goto invalid;
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}
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2015-09-30 17:33:21 +02:00
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index = raw.indexOf(URL_GPIO);
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if (index == -1)
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goto invalid;
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end = raw.indexOf(" ", index);
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if (end == -1)
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goto invalid;
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url = raw.substring(index, end);
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end = url.indexOf("/", 1);
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//URL is /gpioN something
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if (end == -1) {
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req.type = GET_VALUE;
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req.gpio = url.substring(strlen(URL_GPIO)).toInt();
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} else {
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req.type = SET_VALUE;
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req.gpio = url.substring(strlen(URL_GPIO), end).toInt();
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req.value = url.substring(end + 1).toInt();
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}
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return 0;
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invalid:
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req.type = INVALID;
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return -1;
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}
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void setup() {
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uint8_t mac[WL_MAC_ADDR_LENGTH];
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Serial.begin(115200);
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delay(10);
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// prepare GPIO2
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pinMode(2, OUTPUT);
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digitalWrite(2, 0);
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if (WiFi.macAddress(mac) != 0) {
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for (int i = 0; i < WL_MAC_ADDR_LENGTH; i++) {
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Serial.print(mac[i], HEX);
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Serial.print((i < WL_MAC_ADDR_LENGTH - 1) ? ":" : "\n");
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}
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}
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// Connect to WiFi network
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Serial.println();
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Serial.println();
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Serial.print("Connecting to ");
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Serial.println(ssid);
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WiFi.begin(ssid, password);
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while (WiFi.status() != WL_CONNECTED) {
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delay(500);
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Serial.print(".");
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}
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Serial.println("");
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Serial.println("WiFi connected");
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// Start the server
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server.begin();
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Serial.println("Server started");
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// Print the IP address
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Serial.println(WiFi.localIP());
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}
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void loop() {
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// Check if a client has connected
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WiFiClient client = server.available();
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if (!client) {
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return;
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}
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// Wait until the client sends some data
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Serial.println("new client");
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while (!client.available()) {
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delay(1);
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}
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// Read the first line of the request
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String req = client.readStringUntil('\r');
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Serial.println(req);
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client.flush();
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struct request request;
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if (parseRequest(req, request) == -1 || request.type == INVALID ) {
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Serial.println("invalid request");
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client.stop();
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return;
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}
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client.flush();
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String s = "HTTP/1.1 200 OK\r\nContent-Type: text/html\r\n\r\n<!DOCTYPE HTML>\r\n<html>\r\n";
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if (request.type == SET_VALUE) {
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// Set GPIO according to the request
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Serial.print("Setting gpio ");
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Serial.print(request.gpio);
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Serial.print(" to ");
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Serial.println(request.value);
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//make sure this GPIO is set as output
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pinMode(request.gpio, OUTPUT);
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digitalWrite(request.gpio, request.value);
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// Prepare the response
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s += "GPIO";
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s += request.gpio;
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s += " is now ";
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s += (request.value) ? "high" : "low";
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} else if (request.type == GET_VALUE) {
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Serial.print("Getting value of GPIO");
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Serial.println(request.gpio);
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s += "GPIO";
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s += request.gpio;
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s += " is ";
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s += digitalRead(request.gpio);
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2015-10-01 01:06:19 +02:00
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} else if (request.type == SET_MODE) {
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Serial.print("Setting mode of GPIO");
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Serial.print(request.gpio);
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Serial.print(" to mode ");
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Serial.print(request.value);
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pinMode(request.gpio, request.value);
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s += "GPIO";
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s += request.gpio;
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s += " mode is now ";
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s += (request.value);
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2015-09-30 17:33:21 +02:00
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}
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2015-10-01 01:06:19 +02:00
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2015-09-30 17:33:21 +02:00
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s += "</html>\n";
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client.print(s);
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// Send the response to the client
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delay(1);
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Serial.println("Client disonnected");
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// The client will actually be disconnected
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// when the function returns and 'client' object is detroyed
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}
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