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Author Topic: Arduino library for WTV020-SD-16P audio module  (Read 107802 times)
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I know what you mean about the confusion.
A little extra time in initialization hardly impacts speed anyway.
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hello ... this is my first time to make an arduino project .........
I just want to ask if audio amplifier is necessary in this module? smiley-grin
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I guess not, I've tested it with a couple of 8 Ohm speakers and they are loud enough.
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You might be safe to feed it to amplified speakers but it would need resistors to feed as Line In to an amp.
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thanks for the reply ...

After I made the connection in Arduino Uno,  format the 2 gb Sd card into Fat32, and covert my audio files into Ad4 file with 3200 sample rate, I still fail make this module work ...

I thought of adding audio amplifier because my module does not emit any sound ...
but the led connected to the busy pin blinks several times and later become stable at a specific time. and then it blinks again ...
what do you think is the problem in my module
can you suggest something to solve my problem....  smiley-roll-sweat
any suggestions is deeply appreciated   smiley-grin
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I haven't read the previous posts yet, but have you tried a WAV file?
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I haven't read the previous posts yet, but have you tried a WAV file?

yes i tried it ... I notice that led blinks when the music is played and it become stable when the music ends. this is based on the duration of the music... did your module play wav file ?
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Yea, its weird, some play as WAVs and others as AD4

Added: Im using a Sandisk 1GB memory card fat32 format.
« Last Edit: August 01, 2014, 01:05:51 pm by HazardsMind » Logged

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yes its true ... by the way ... do you think using an  8 ohms speaker with 0.5 w will work ? ...
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I'm not sure what speakers it can handle, but it should be fine.
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okay ... I hope that It will be fine I will look for another speaker and sd card ... did have some sample codes out there can I have it ? smiley-grin
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Im using the same code and library provided on page one of this thread.
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ok thanks a lot  smiley-lol .... 
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at last I finally made it ... thanks to all suggestions  smiley-mr-green
it is tru ... sd card is the problem ... I bought san disk 2gb sd card and it works smiley
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Dear all, i tell you my experience with this great and cheap module and at the end, one problem i am having.
I plays ad4 ok, converted from mp3 using somotool.
Memory card was difficult to get one working finally checked two 2gb microsd one generic, the other one, kingston. And one generic 128mb microsd also worked, all of them fat formated.
I needed to play 2 short voice sounds one after the other, but could not get it with only one module, there was a gap (about 1 second) between each sound. So i used 2 modules conected to arduino Uno in diferent pins.

Problem: I cant get the amplifier output to work, when i connect the amp out to the amplifier,after inserting a 0.01uF between module output and amplifier input, i get a static noise in high volume and the voice sounds in a very low volume over the static.
Do you know which could be the problem?
Could I use the speaker out as amplifier input? Or I would damage the amp input?

Thanks!!!!
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