RFID WiFi Reader problems
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RFID WiFi Reader problems

by ChrisBoBMMS on Tue Jul 30, 2019 11:25 pm

I built A WiFi RFID reader using a Huzza Feather and PN532 breakout board. Actually I built a few of them, but one has started to give me trouble and I'm not sure how to troubleshoot the intermittent problem.
All they do is read the rfid serial number, send it via http, then output a text message on an oled display based on the http response.
The problem is that on the one reader it will occasionally simply stop responding - usually after a few minutes of idle time. When reset, the whole system works again. It almost feels like something is going to sleep. Ideas to check? I could replace components one at a time, but it's tough to tell when a replacement is effective. The same Arduino program is loaded in each of the readers i have built.

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Re: RFID WiFi Reader problems

by adafruit_support_mike on Wed Jul 31, 2019 2:11 pm

Check the Wifi connection state periodically, to make sure it’s still working.

Wireless connections are much more sensitive to noise and interference than wired connections. The question isn’t “will the link drop?” but “when will the link drop?”

Any wireless device that works over the long term needs to check its connection and reconnect when necessary.

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Please be positive and constructive with your questions and comments.