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!