I am attempting to build a system which stays active when an RFID tag is present and then deactivates when it's removed.
RFID readers seem to have an output that fires once when the tag is in range and then doesn't run again until the tag is moved away then then rescanned.
My initial idea was to use a standard reader and then reset it forcing a new tag to come through each time. The ID-20 reader has a reset pin which I believe supports this.
I would prefer to use a cheaper reader for this project as I have quite a few to build so I am currently working with this device.
The cheaper reader doesn't have a reset pin so I was going to toggle the power to the reader when I wanted a new read. Sadly this didn't work as planned, this cheaper reader only seems to read when a tag is moving through the field.
Has anyone done anything like this before and can offer advice or would anyone know why the cheaper reader wouldn't work when the tag is static?