Fixed Alexa discovery

Author: Aircoookie

CHANGELOG.md

@@ -2,6 +2,10 @@
 
 ### Development versions after 0.11.0 release
 
+#### Build 2012160
+
+-   Bump Espalexa to 2.5.0, fixing discovery (PR Espalexa/#152, originally PR #1497)
+
 #### Build 2012150
 
 -   Added Blends FX (PR #1491)

wled00/src/dependencies/espalexa/Espalexa.h

@@ -10,7 +10,7 @@
  */
 /*
  * @title Espalexa library
- * @version 2.4.6
+ * @version 2.5.0
  * @author Christian Schwinne
  * @license MIT
  * @contributors d-999
@@ -50,7 +50,7 @@
 #include "../network/Network.h"
 
 #ifdef ESPALEXA_DEBUG
- #pragma message "Espalexa 2.4.6 debug mode"
+ #pragma message "Espalexa 2.5.0 debug mode"
  #define EA_DEBUG(x)  Serial.print (x)
  #define EA_DEBUGLN(x) Serial.println (x)
 #else
@@ -60,6 +60,7 @@
 
 #include "EspalexaDevice.h"
 
+#define DEVICE_UNIQUE_ID_LENGTH 12
 
 class Espalexa {
 private:
@@ -116,17 +117,24 @@ class Espalexa {
     return "";
   }
 
-  //Workaround functions courtesy of Sonoff-Tasmota
-  uint32_t encodeLightId(uint8_t idx)
+  void encodeLightId(uint8_t idx, char* out)
   {
+    //Unique id must be 12 character len
+    //use the last 10 characters of the MAC followed by the device id in hex value
+    //uniqueId: aabbccddeeii
+
     uint8_t mac[6];
     WiFi.macAddress(mac);
-    uint32_t id = (mac[3] << 20) | (mac[4] << 12) | (mac[5] << 4) | (idx & 0xF);
-    return id;
-  }
 
-  uint32_t decodeLightId(uint32_t id) {
-    return id & 0xF;
+    //shift the mac address to the left (discard first byte)
+    for (uint8_t i = 0; i < 5; i++) {
+      mac[i] = mac[i+1];
+    }
+    mac[5] = idx;
+
+    for (uint8_t i = 0; i < 6; i++) {
+      sprintf(out + i*2, "%.2x", mac[i]);
+    }
   }
 
   //device JSON string: color+temperature device emulates LCT015, dimmable device LWB010, (TODO: on/off Plug 01, color temperature device LWT010, color device LST001)
@@ -136,10 +144,8 @@ class Espalexa {
     if (deviceId >= currentDeviceCount) {strcpy(buf,"{}"); return;} //error
     EspalexaDevice* dev = devices[deviceId];
 
-    //char buf_bri[12] = "";
-    //brightness support, add "bri" to JSON
-    //if (dev->getType() != EspalexaDeviceType::onoff) 
-    //  sprintf(buf_bri,",\"bri\":%u", dev->getLastValue()-1);
+    char buf_lightid[13];
+    encodeLightId(deviceId + 1, buf_lightid);
 
     char buf_col[80] = "";
     //color support
@@ -161,10 +167,10 @@ class Espalexa {
 
     sprintf_P(buf, PSTR("{\"state\":{\"on\":%s,\"bri\":%u%s%s,\"alert\":\"none%s\",\"mode\":\"homeautomation\",\"reachable\":true},"
                    "\"type\":\"%s\",\"name\":\"%s\",\"modelid\":\"%s\",\"manufacturername\":\"Philips\",\"productname\":\"E%u"
-                   "\",\"uniqueid\":\"%u\",\"swversion\":\"espalexa-2.4.6\"}")
+                   "\",\"uniqueid\":\"%s\",\"swversion\":\"espalexa-2.5.0\"}")
 
     , (dev->getValue())?"true":"false", dev->getLastValue()-1, buf_col, buf_ct, buf_cm, typeString(dev->getType()),
-    dev->getName().c_str(), modelidString(dev->getType()), static_cast<uint8_t>(dev->getType()), encodeLightId(deviceId+1));
+    dev->getName().c_str(), modelidString(dev->getType()), static_cast<uint8_t>(dev->getType()), buf_lightid);
   }
 
   //Espalexa status page /espalexa
@@ -186,7 +192,7 @@ class Espalexa {
     }
     res += "\r\nFree Heap: " + (String)ESP.getFreeHeap();
     res += "\r\nUptime: " + (String)millis();
-    res += "\r\n\r\nEspalexa library v2.4.6 by Christian Schwinne 2020";
+    res += "\r\n\r\nEspalexa library v2.5.0 by Christian Schwinne 2020";
     server->send(200, "text/plain", res);
   }
   #endif
@@ -222,7 +228,7 @@ class Espalexa {
         "<URLBase>http://%s:80/</URLBase>"
         "<device>"
           "<deviceType>urn:schemas-upnp-org:device:Basic:1</deviceType>"
-          "<friendlyName>Espalexa (%s)</friendlyName>"
+          "<friendlyName>Espalexa (%s:80)</friendlyName>"
           "<manufacturer>Royal Philips Electronics</manufacturer>"
           "<manufacturerURL>http://www.philips.com</manufacturerURL>"
           "<modelDescription>Philips hue Personal Wireless Lighting</modelDescription>"
@@ -237,8 +243,8 @@ class Espalexa {
 
     server->send(200, "text/xml", buf);
 
-    EA_DEBUG("Send setup.xml");
-    //EA_DEBUGLN(setup_xml);
+    EA_DEBUGLN("Send setup.xml");
+    EA_DEBUGLN(buf);
   }
 
   //init the server
@@ -290,15 +296,15 @@ class Espalexa {
     sprintf(s, "%d.%d.%d.%d", localIP[0], localIP[1], localIP[2], localIP[3]);
 
     char buf[1024];
-    
+
     sprintf_P(buf,PSTR("HTTP/1.1 200 OK\r\n"
       "EXT:\r\n"
       "CACHE-CONTROL: max-age=100\r\n" // SSDP_INTERVAL
       "LOCATION: http://%s:80/description.xml\r\n"
       "SERVER: FreeRTOS/6.0.5, UPnP/1.0, IpBridge/1.17.0\r\n" // _modelName, _modelNumber
       "hue-bridgeid: %s\r\n"
       "ST: urn:schemas-upnp-org:device:basic:1\r\n"  // _deviceType
-      "USN: uuid:2f402f80-da50-11e1-9b23-%s::ssdp:all\r\n" // _uuid::_deviceType
+      "USN: uuid:2f402f80-da50-11e1-9b23-%s::upnp:rootdevice\r\n" // _uuid::_deviceType
       "\r\n"),s,escapedMac.c_str(),escapedMac.c_str());
 
     espalexaUdp.beginPacket(espalexaUdp.remoteIP(), espalexaUdp.remotePort());
@@ -359,24 +365,28 @@ class Espalexa {
 
     if (!udpConnected) return;   
     int packetSize = espalexaUdp.parsePacket();    
-    if (!packetSize) return; //no new udp packet
+    if (packetSize < 1) return; //no new udp packet
 
     EA_DEBUGLN("Got UDP!");
-    char packetBuffer[255]; //buffer to hold incoming udp packet
-    uint16_t len = espalexaUdp.read(packetBuffer, 254);
-    if (len > 0) {
-      packetBuffer[len] = 0;
-    }
+
+    unsigned char packetBuffer[packetSize+1]; //buffer to hold incoming udp packet
+    espalexaUdp.read(packetBuffer, packetSize);
+    packetBuffer[packetSize] = 0;
+  
     espalexaUdp.flush();
     if (!discoverable) return; //do not reply to M-SEARCH if not discoverable
-    
-    String request = packetBuffer;
-    if(request.indexOf("M-SEARCH") >= 0) {
-      EA_DEBUGLN(request);
-      if(request.indexOf("upnp:rootdevice") > 0 || request.indexOf("asic:1") > 0 || request.indexOf("ssdp:all") > 0) {
-        EA_DEBUGLN("Responding search req...");
-        respondToSearch();
-      }
+  
+    const char* request = (const char *) packetBuffer;
+    if (strstr(request, "M-SEARCH") == nullptr) return;
+
+    EA_DEBUGLN(request);
+    if (strstr(request, "ssdp:disc")  != nullptr &&  //short for "ssdp:discover"
+        (strstr(request, "upnp:rootd") != nullptr || //short for "upnp:rootdevice"
+         strstr(request, "ssdp:all")   != nullptr ||
+         strstr(request, "asic:1")     != nullptr )) //short for "device:basic:1"
+    {
+      EA_DEBUGLN("Responding search req...");
+      respondToSearch();
     }
   }
 
@@ -452,13 +462,12 @@ class Espalexa {
       return true;
     }
 
-    if (req.indexOf("state") > 0) //client wants to control light
+    if ((req.indexOf("state") > 0) && (body.length() > 0)) //client wants to control light
     {
       server->send(200, "application/json", F("[{\"success\":{\"/lights/1/state/\": true}}]"));
 
       uint32_t devId = req.substring(req.indexOf("lights")+7).toInt();
       EA_DEBUG("ls"); EA_DEBUGLN(devId);
-      devId = decodeLightId(devId);
       EA_DEBUGLN(devId);
       devId--; //zero-based for devices array
       if (devId >= currentDeviceCount) return true; //return if invalid ID
@@ -530,7 +539,7 @@ class Espalexa {
         String jsonTemp = "{";
         for (int i = 0; i<currentDeviceCount; i++)
         {
-          jsonTemp += "\"" + String(encodeLightId(i+1)) + "\":";
+          jsonTemp += "\"" + String(i+1) + "\":";
           char buf[512];
           deviceJsonString(i+1, buf);
           jsonTemp += buf;
@@ -540,7 +549,6 @@ class Espalexa {
         server->send(200, "application/json", jsonTemp);
       } else //client wants one light (devId)
       {
-        devId = decodeLightId(devId);
         EA_DEBUGLN(devId);
         if (devId > currentDeviceCount)
         {

wled00/wled.h

@@ -8,7 +8,7 @@
  */
 
 // version code in format yymmddb (b = daily build)
-#define VERSION 2012150
+#define VERSION 2012160
 
 //uncomment this if you have a "my_config.h" file you'd like to use
 //#define WLED_USE_MY_CONFIG