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I'm trying to put a DFPlayer module into sleep mode. The command seems to be: 7E FF 06 0A 00 00 00 FE F1 EF. The normal power consumption my supply is showing (when the module is idle) is about 15mA, after sending the sleep command I read exactly the same. Sending the command another time will get an error (0x40).

Anyone observed similar behavior?

user34920
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    note: the datasheet specifies a standby current of 20mA. – jsotola Dec 16 '17 at 22:49
  • I actually noticed that, but assumed that is incorrect as the current I see when power up the device is less. Even if my power supply is wrong by 25% I would have expected to see a lower current after putting the device is sleep mode? – user34920 Dec 16 '17 at 23:00
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    the player uses the YX5300-24SS chip. .... found this data sheet that specifies standby current of < 200μA .... maybe the chip goes to sleep, but the SD card does not (not sure about SD cards)?? .... https://xp-dev.com/trac/arduino_antonio/export/280/arduino_antonio/trunk/EnterpriseBase/Serial%20MP3%20Player/About%20the%20Chip%20-%20YX5300/YX5300-24SS%20Datasheet%20V1.0.pdf – jsotola Dec 16 '17 at 23:12
  • The module also has the 8002 audio amplifier IC, datasheet says between 7.5 to 10mA current consumption. Shutdown current 2uA. Not sure the shutdown pin is connected. – user34920 Dec 16 '17 at 23:34
  • 8002 audio amplifier IC .... pull pin #1 high to enter shutdown state .... maybe you can trace the connection – jsotola Dec 16 '17 at 23:38

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