Fix Waveshare RLCD audio playback: initialize ES8311 DAC on audio_start event and track byte counts/errors

main.py

@@ -502,6 +502,8 @@ def main():
                             ws.send_text(json.dumps({"event": "stop"}))
                             
                             i2s_tx = None
+                            received_audio_bytes = 0
+                            speaker_write_failed = False
                             while True:
                                 opcode, payload = ws.recv_frame()
                                 if opcode is None:
@@ -529,6 +531,15 @@ def main():
                                             on_val = 0 if board_config.audio_amp_active_level == 0 else 1
                                             amp_pin.value(on_val) # Enable Amp
                                             
+                                            # Initialize ES8311 Speaker DAC
+                                            try:
+                                                from audio_util import ES8311
+                                                dac = ES8311(i2c)
+                                                dac.init(sample_rate=16000)
+                                                dac.set_volume(85)
+                                            except Exception as dace:
+                                                print("Failed to initialize ES8311 DAC for playback:", dace)
+                                            
                                             i2s_format = I2S.MONO # WebSocket audio response is mono
                                             i2s_tx = I2S(1,
                                                          sck=Pin(board_config.audio_i2s_sck),
@@ -547,6 +558,10 @@ def main():
                                                 amp_pin.value(off_val) # Disable Amp
                                                 i2s_tx.deinit()
                                                 i2s_tx = None
+                                            if speaker_write_failed:
+                                                draw_status_bar("Speaker write failed")
+                                            else:
+                                                draw_status_bar(f"Recv {received_audio_bytes} bytes")
                                                 
                                         elif evt == "done":
                                             break
@@ -567,7 +582,9 @@ def main():
                                             chunk = chunk[44:]
                                         try:
                                             i2s_tx.write(chunk)
+                                            received_audio_bytes += len(chunk)
                                         except Exception as e:
+                                            speaker_write_failed = True
                                             print("Error writing to speaker:", e)
                         except Exception as he:
                             print("Hermes WS query failed:", he)