Red circle stays red, will not read cards, using a homemade reader, an actual credit card reader head direct wired to the mic terminals of the TRRS plug. May work with the square reader, but I don't know how to tell the old non encrypted one from the new one. Tried tweaking settings, still no luck. Update: I now have a generic reader, and it reads cards 2 out of 5 times with the app.
Didn't work at all for me on Acer A500 using various cards the SquareUp app can read easily. Every swipe failed with a, "bad read, try again" error.
Works with Galaxy S3 This worked with my Galaxy S3 (model i747). I used the original Square credit card reader and was able to read Visa, Master Card, driver's license, and several other magnetic stripe cards. By creating a shim, I was able to read each track on the card and pull data such as card number, expiration date, name, and address. I set the sample rate to 22050, threshold level to 50%, and silence level to 500. If you receive the "bad read" error, try applying different pressure to the card as you swipe or swipe back and forth. The Square readers are temperamental. Functionality is perfect but I'd like to see some improvements to the user interface.
Just what I was looking Works with the really cheap square reader from ebay, $4 or so. Just misses a way to include more data in the csv with vendors
It's what I'm looking for. Seems to open fine but Says "bad read try again" with the new square reader which is due to the encryption used. Cards tested were gift cards and prepaid phone cards. Also you could add a "prevent phone from sleeping" feature and then give the option to turn it on or off. other than that, this app was what I was after.
It doesn't work Moto G 1st and 2do generation. Always 'Bad read'. I tried with different settings without any result.
Removed a few debug statements that might leak info through logs, attempt to fix occasional NullPointer crash on Square dongle insert/remove.