Using new SoftAP Http pages to configure other settings

General
4

In the meantime, you can communicate between the webpage and the photon using HTTP requests, handled by the “myPage” function, so long as SYSTEM_THREAD(ENABLED) is called. Here’s my code to control the color of an Internet Button using a simple SoftAP webpage.

#pragma SPARK_NO_PREPROCESSOR

#include "Particle.h"
#include "softap_http.h"
#include "InternetButton.h"

SYSTEM_THREAD(ENABLED);

int r, g, b = 0;

struct Page
{
    const char* url;
    const char* mime_type;
    const char* data;
};


const char index_html[] = "<html><div align=\"center\"><form action=\"color\" method=\"get\"><input id=\"background-color\" name=\"color\" type=\"color\"/><input type=\"submit\" value=\"Go!\"/></form></div></html>";

Page myPages[] = {
     { "/index.html", "text/html", index_html },
     { nullptr }
};

void myPage(const char* url, ResponseCallback* cb, void* cbArg, Reader* body, Writer* result, void* reserved)
{
    String urlString = String(url);
    Serial.printlnf("handling page %s", url);
    char* data = body->fetch_as_string();
    Serial.println(String(data));
    free(data);

    if (strcmp(url,"/index")==0) {
        Serial.println("sending redirect");
        Header h("Location: /index.html\r\n");
        cb(cbArg, 0, 301, "text/plain", &h);
        return;
    }
    if (urlString.indexOf("/color") != -1) {
        r = (int)strtol(urlString.substring(14, 16).c_str(), nullptr, 16);
        g = (int)strtol(urlString.substring(16, 18).c_str(), nullptr, 16);
        b = (int)strtol(urlString.substring(18).c_str(), nullptr, 16);
        Serial.println(r);
        Serial.println(g);
        Serial.println(b);

    }

    int8_t idx = 0;
    for (;;idx++) {
        Page& p = myPages[idx];
        if (!p.url) {
            idx = -1;
            break;
        }
        else if (strcmp(url, p.url)==0) {
            break;
        }
    }

    if (idx==-1) {
        Header h("Location: /index.html\r\n");
        cb(cbArg, 0, 301, "text/plain", &h);
    }
    else {
        cb(cbArg, 0, 200, myPages[idx].mime_type, nullptr);
        result->write(myPages[idx].data);
    }
}

unsigned long t = 0;
InternetButton button = InternetButton();

STARTUP(softap_set_application_page_handler(myPage, nullptr));

void setup() {
    WiFi.listen();
    button.begin();
}

void loop() {
    if (millis()-t >= 200) {
        button.allLedsOn(r, g, b);
        t = millis();
    }
}
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