ssid dropdown proof-of-concept

Author: tcsullivan

noisemeter-device/access-point-html.cpp

@@ -72,11 +72,15 @@ const char *HTML_FOOTER = R"html(
 </html>
 )html";
 
-const char *HTML_BODY_FORM = R"html(
+const char *HTML_BODY_FORM_HEADER = R"html(
 <p>Enter the wifi network name and password for your home network, which the sensor can connect to to get online:<br/><br/></p>
     <form method='POST' action='/submit' enctype='multipart/form-data'>
-      <p>Wifi network name:</p>
-      <input type='text' name='ssid' autocorrect='off' autocapitalize='none' autocomplete='off' required/>
+      <p>Wifi network name: (* = password required)</p>
+      <select name='ssid' required>
+)html";
+
+const char *HTML_BODY_FORM_FOOTER = R"html(
+      </select>
       <p>Wifi network password:</p>
       <input type='password' name='psk'/>
       <p>Your Email (also your username for logging into the tRacket portal):</p>

noisemeter-device/access-point-html.hpp

@@ -1,5 +1,6 @@
 extern const char *HTML_HEADER;
 extern const char *HTML_CONTAINER;
 extern const char *HTML_FOOTER;
-extern const char *HTML_BODY_FORM;
+extern const char *HTML_BODY_FORM_HEADER;
+extern const char *HTML_BODY_FORM_FOOTER;
 

noisemeter-device/access-point.cpp

@@ -27,6 +27,8 @@ constexpr auto ACCESS_POINT_TIMEOUT_SEC = MIN_TO_SEC(30);
 const IPAddress AccessPoint::IP (8, 8, 4, 4);
 const IPAddress AccessPoint::Netmask (255, 255, 255, 0);
 
+static int networkScanCount = 0;
+
 AccessPoint::AccessPoint(SubmissionHandler func):
     timeout(ACCESS_POINT_TIMEOUT_SEC),
     server(80),
@@ -50,6 +52,8 @@ String AccessPoint::htmlFromMsg(const char *msg, const char *extra)
 
 void AccessPoint::run()
 {
+    networkScanCount = WiFi.scanNetworks();
+
     WiFi.mode(WIFI_AP);
     WiFi.softAPConfig(IP, IP, Netmask);
     WiFi.softAP(SSID, Passkey);
@@ -157,7 +161,21 @@ bool AccessPoint::handle(WebServer& server, HTTPMethod method, String uri)
             response.reserve(2048);
             response += HTML_HEADER;
             response += HTML_CONTAINER;
-            response += HTML_BODY_FORM;
+            response += HTML_BODY_FORM_HEADER;
+
+            for (int i = 0; i < networkScanCount; ++i) {
+                const auto ssid = WiFi.SSID(i);
+
+                response += "<option value=\"";
+                response += ssid;
+                response += "\">";
+                response += ssid;
+                if (auto ty = WiFi.encryptionType(i); ty != WIFI_AUTH_OPEN)
+                    response += " *";
+                response += "</option>";
+            }
+
+            response += HTML_BODY_FORM_FOOTER;
             response += HTML_FOOTER;
 
             timeout = DAY_TO_SEC(30);

platformio.ini

@@ -27,7 +27,7 @@ build_flags =
 	-std=gnu++17
 	-DBUILD_PLATFORMIO
 	-DNO_GLOBAL_EEPROM
-        -DNOISEMETER_VERSION=\"0.2.2\"
+        -DNOISEMETER_VERSION=\"0.2.3\"
 	-Wall -Wextra
 
 [env:esp32-pcb]