Sunday, August 17, 2014

WTV020-SD Regular SD Card hack

I ordered a WTV020-SD audio player module from eBay for an MP3-player doorbell project.  These modules support an MP3-player mode, but do not play regular MP3 files. MP3 player mode just seems to hint at being able to play/pause/skip tracks on the micro-SD card. Furthermore these modules are very picky about the micro-SD cards used. I found exactly one Sandisk 2Gb card which plays correctly, all others tested don't play at all...
As I planned to build multiple wireless doorbell nodes I needed more supported micro-SD cards.
After google'ing around it appeared I wasn't alone in the quest for micro-SD cards supported by this little player. Most reports of cards working were for relatively small cards of 1Gb or less, but I didn't plan on buying a batch of overprized micro-SD cards at random, hoping they would play in the WTV020-SD module.


SD cards to the rescue

Going through my collection of SD cards I found out I had quite a lot of small-capacity regular SD cards lying around.
So I heated my soldering iron and attached a modified male header to function as SD card connector.
DIY SD card connector soldered to the WTV020-SD
Close-up of the WTV020-SD
First I tried the supported 2Gb Sandisk using a SD to micro-SD adapter and voila, it worked!
Now I wrote a few audio tracks to all of the smaller SD cards and inserted them in the DIY SD card adapter one-by-one. Below are all the cards in my collection which appeared to work correctly with the sound module:

Regular SD Cards found working with the WTV020-SD
Especially the Platinum cards are interesting. I once bought 3 of them simultaneously, but only 2 work correctly with the sound module... This once more confirms the hocus pocus going on in this module!

2 comments:

  1. thanks, just ordered my wtv020 module and currently looking for compatible 2Gb sd card.will go for sandisk.thanks

    ReplyDelete
  2. thanks, just ordered my wtv020 module and currently looking for compatible 2Gb sd card.will go for sandisk.thanks

    ReplyDelete