connect to server when calling begin()

Author: pschatzmann

examples/SnapClientEthernet/SnapClientEthernet.ino

@@ -0,0 +1,44 @@
+// We just test the output by providing a hex dump of the received data
+
+#include <Ethernet.h>
+#include <SPI.h>
+#include "AudioTools.h"
+#include "SnapClient.h"
+
+// Example settings for RP2040
+#define ETH_MISO  0
+#define ETH_MOSI  3
+#define ETH_SCLK  2
+
+EthernetClient eth;
+HexDumpOutput out;                   // final output
+CopyDecoder codec;
+SnapClient client(eth, out, codec);
+byte mac[] = {0xDE, 0xAD, 0xBE, 0xEF, 0xFE, 0xED};
+IPAddress ip(192, 168, 1, 177);
+
+void setup() {
+  Serial.begin(115200);
+
+  SPI.setRX(ETH_MISO);
+  SPI.setTX(ETH_MOSI);
+  SPI.setSCK(ETH_SCLK);
+  SPI.begin();
+
+  // start the Ethernet connection:
+  if (!eth.begin(mac, ip)) {
+    Serial.print("Ethernet error");
+    while (true);
+  }
+
+  // Define CONFIG_SNAPCAST_SERVER_HOST in SnapConfig.h or here
+  client.setServerIP(IPAddress(192, 168, 1, 38));
+
+  // start snap client
+  if (!client.begin()) {
+    Serial.print("Connection error");
+    while (true);
+  }
+}
+
+void loop() { client.doLoop(); }

src/SnapClient.h

@@ -156,7 +156,7 @@ class SnapClient {
   }
 
   /// Call from Arduino Loop - to receive and process the audio data
-  void doLoop() { p_snapprocessor->doLoop(); }
+  bool doLoop() { return p_snapprocessor->doLoop(); }
 
 protected:
   const char *TAG = "SnapClient";

src/api/SnapProcessor.h

@@ -32,12 +32,19 @@ class SnapProcessor {
     p_snap_output = &snap_output;
   }
 
+  /// Sets up the output and the client
   virtual bool begin() {
-    bool result = false;
+    bool result = true;
+    // start output chain
     if (output_start) {
       result = audioBegin();
     }
 
+    // connect to snapcast server
+    if(!connectClient()){
+        result = false;
+    }
+
     if (http_task_start) {
       last_time_sync = 0;
       id_counter = 0;
@@ -71,11 +78,11 @@ class SnapProcessor {
   void setStartTask(bool flag) { http_task_start = flag; }
 
   /// Call via SnapClient in Arduino Loop!
-  virtual void doLoop() { 
+  bool doLoop() { 
     if (is_fast_loop)
-      processLoopStepFast();
+      return processLoopStepFast();
     else
-      processLoopStep();
+      return processLoopStep();
    }
 
   /// Defines the output class
@@ -146,7 +153,7 @@ class SnapProcessor {
           ESP_LOGI(TAG, "... connected");
         } else {
           delay(10);
-          return true;
+          return false;
         }
 
         now = snap_time.time();
@@ -188,7 +195,7 @@ class SnapProcessor {
       ESP_LOGI(TAG, "... connected");
     } else {
       delay(10);
-      return true;
+      return false;
     }
 
     now = snap_time.time();
@@ -275,9 +282,11 @@ class SnapProcessor {
     return true;
   }
 
+  /// connects to the server: returns true if we are connected
   bool connectClient() {
     ESP_LOGD(TAG, "start");
     if (p_client->connected()) return true;
+    p_client->stop(); // for Ethernet.h 
     p_client->setTimeout(CONFIG_CLIENT_TIMEOUT_SEC);
     if (!p_client->connect(server_ip, server_port)) {
       char str_address[50];