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sonoff/xdrv_91_mp3.ino

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+/*
+  xdrv_91_mp3.ino - MP3 Player support for Sonoff-Tasmota
+  Player type: RB-DFR-562, DFPlayer Mini MP3 Player
+  Copyright (C) 2018  Theo Arends
+  This program is free software: you can redistribute it and/or modify
+  it under the terms of the GNU General Public License as published by
+  the Free Software Foundation, either version 3 of the License, or
+  (at your option) any later version.
+  This program is distributed in the hope that it will be useful,
+  but WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+  GNU General Public License for more details.
+  You should have received a copy of the GNU General Public License
+  along with this program.  If not, see <http://www.gnu.org/licenses/>.
+    
+*/
+
+#ifdef USE_MP3_PLAYER
+
+#include <TasmotaSerial.h>
+
+TasmotaSerial *MP3Player;
+
+#define D_CMND_MP3 "MP3"
+const char S_JSON_MP3_COMMAND_NVALUE[] PROGMEM = "{\"" D_CMND_MP3 "%s\":%d}";
+const char S_JSON_MP3_COMMAND[] PROGMEM        = "{\"" D_CMND_MP3 "%s\"}";
+
+enum MP3_Commands { CMND_MP3_PLAY, CMND_MP3_STOP, CMND_MP3_VOLUME};
+const char kMP3_Commands[] PROGMEM = "Play" "|" "Stop" "|" "Volume";
+
+#define MP3_CMD_PLAY 3
+#define MP3_CMD_VOLUME 6
+#define MP3_CMD_STOP 0x0e
+
+uint16_t MP3_Checksum(uint8_t *array)
+{
+  uint16_t checksum = 0;
+  for (uint8_t i = 0; i < 6; i++) {
+    checksum += array[i];
+  }
+  checksum = checksum^0xffff;
+  return checksum+1;
+}
+
+// init player define serial tx port
+void InitMP3Player() {
+  MP3Player = new TasmotaSerial(-1, pin[GPIO_MP3PLAYER]);
+  
+  if (MP3Player->begin(9600)) {
+    //serial_bridge_active = 1;
+    MP3Player->flush();
+  }
+}
+
+void MP3_CMD(uint8_t mp3cmd,uint16_t val) {
+  uint8_t cmd[10] = {0x7e,0xff,6,0,0,0,0,0,0,0xef};
+  cmd[3] = mp3cmd;
+  cmd[5] = val>>8;
+  cmd[6] = val;
+  uint16_t chks = MP3_Checksum(&cmd[1]);								// calculate out
+  cmd[7] = chks>>8;
+  cmd[8] = chks;
+  MP3Player->write(cmd, sizeof(cmd));
+}
+
+boolean MP3PlayerCmd() {
+  char command[CMDSZ];
+  boolean serviced = true;
+  uint8_t disp_len = strlen(D_CMND_MP3);
+  
+  if (!strncasecmp_P(XdrvMailbox.topic, PSTR(D_CMND_MP3), disp_len)) {  // Prefix
+    int command_code = GetCommandCode(command, sizeof(command), XdrvMailbox.topic + disp_len, kMP3_Commands);
+
+    if (CMND_MP3_PLAY == command_code) {
+      if (XdrvMailbox.data_len > 0) {									// play
+        MP3_CMD(MP3_CMD_PLAY, XdrvMailbox.payload);
+      }
+      snprintf_P(mqtt_data, sizeof(mqtt_data), S_JSON_MP3_COMMAND_NVALUE, command, XdrvMailbox.payload);
+    }
+    else if (CMND_MP3_VOLUME == command_code) {
+      if (XdrvMailbox.data_len > 0) {									// set volume
+        MP3_CMD(MP3_CMD_VOLUME, XdrvMailbox.payload * 30 / 100);
+      }
+      snprintf_P(mqtt_data, sizeof(mqtt_data), S_JSON_MP3_COMMAND_NVALUE, command, XdrvMailbox.payload);
+    } 
+	else if (CMND_MP3_STOP == command_code) {							// stop
+      MP3_CMD(MP3_CMD_STOP, 0);
+      snprintf_P(mqtt_data, sizeof(mqtt_data), S_JSON_MP3_COMMAND, command, XdrvMailbox.payload);
+    } else {
+      serviced = false;  												// Unknown command
+    }
+  }
+  return serviced;
+}
+
+/*********************************************************************************************\
+ * Interface
+\*********************************************************************************************/
+
+#define XDRV_91
+
+boolean Xdrv91(byte function)
+{
+  boolean result = false;
+
+  switch (function) {
+    case FUNC_PRE_INIT:
+      InitMP3Player();
+      break;
+    case FUNC_COMMAND:
+      result = MP3PlayerCmd();
+      break;
+  }
+  return result;
+}
+
+#endif  // USE_MP3_PLAYER