We will be closed on November 25, 2021 and November 26, 2021 in observance of the Thanksgiving holiday. We will resume normal operations on November 29, 2021. Wishing you a safe and happy holiday from all your friends at SparkFun!


Receive a free SparkFun USB Thumb Drive with every order this weekend. Details.


Member Since: December 16, 2011

Country: United States

  • Are these ever going to be back in stock?

  • Are these ever going to be back in stock?

  • Could this device be used to control a signal line? Specifically one from a USB source.

  • My shield started randomly resetting the ESP8266 and I have no idea how to fix that. I see no damage that would suggest some short is causing manual reset and in the few moments the blue light is on I can communicate using serial paththrough fine. This is one of those "It was working yesterday" type issue in that I put it away one day and then it just started doing this. Any advice?

  • Does anyone know if there's an AT command to just return the IP address of the ESP8266? I'd rather not have to parse it out if I don't have to.

    Currently AT+CIFSR returns:

    +CIFSR:APIP,"" +CIFSR:APMAC,"2a:ee:32:a2:97:2b" +CIFSR:STAIP,"" +CIFSR:STAMAC,"28:ee:32:a2:97:2b"


    Most tutorials out there seem to suggest it should just return the IP and not all the extra info.

  • iClass is a protocol like mifare. If your cards are like my school IDs, they are likely 13.56MHz but the reader isn't registering them because the protocols don't match. I'm working to see if I can overcome this but I'm not having any luck. I'm also just starting on it so if I make a breakthrough, I'll post again about it.

  • Does anyone know what the field strength of this is? I bought some sticker tags but the reader is reading them. It could be the field strength isn't enough. Also, maybe (And likely) I don't fully understand the requirements of MIFare compliance.

No public wish lists :(