friend. My module is the same and the same somo14d. what happens is that the chip has somo14d shaved, but the same WTV020 see this:
all use the same chip, the same form of serial data transmission. you're putting your files 0000.ad4 0001.ad4 ... ? you're putting in the root of the microsd? formatted with fat? you have to compress the files that you use your card and send me? my email is: wanderlg@gmail.com
thanks for the help.