HW-247A with 3200D chip

[DaleSchultz]

Hi,

I can't get HW-247A with 3200D chip modules to work with your DF_Player_ESP8266_Basic sample code.

The (good) documentation refers to the 3200B and this has 3200D printed on it, and I am wondering if that may be the cause.

Using a Wemos D1 mini (ESP8266) with D1 ---> RX and D2 ---> TX.

mp3.getStatus() returns: 4=communication error

I have increased MP3_SERIAL_TIMEOUT to 800

Tried 3.3V and 5V power. (Red LED on DFPlayer comes on for a short while after powering up)

[androidonis]

I also have this variant and it is working in my design with this lib.

#include "DFPlayer.h"
#include <time.h>
....
Serial.begin(9600, SERIAL_8N1); // speed, type, TX=1, RX=3
mp3.begin(Serial, MP3_SERIAL_TIMEOUT, DFPLAYER_HW_247A, false); //"DFPLAYER_HW_247A" see NOTE, false=no feedback from module after the command
mp3.stop(); //if player was runing during ESP8266 reboot
mp3.reset(); //reset all setting to default
mp3.setSource(2); //1=USB-Disk, 2=TF-Card, 3=Aux, 4=Sleep, 5=NOR Flash
mp3.setEQ(0); //0=Off, 1=Pop, 2=Rock, 3=Jazz, 4=Classic, 5=Bass
mp3.setVolume(volume); //0..30, module persists volume on power failure
mp3.sleep(); //inter standby mode, 24mA
...
mp3.wakeup(2);
mp3.playTrack(1);
...
mp3.stop(); mp3.setVolume(volume); mp3.playTrack(mp3_track);

I hope that helps.
Observations are, that this design is only mono. Output is Pin14 of chip connected to DAC_R and DAC_L through 100nF capacitors.
As I did read there is a firmware in the GD3200 chip which can mean same chips behave different.

[androidonis]

After some programming I discovered that communication is not stable with 3200D. For example I use the module to announce the current time with a combination of up to 5 samples and this is working in principle, but every 3..5 announces the module is not playing one or more of the samples. The signals of serial interface look perfect. Having a mp3.stop(); mp3.setVolume(volume); before any track helps to get it a little more reliable. Is there an example with this driver to see the responses for every command I send. I see that the module is sending something on its serial output, but what?