I bought recently the 125Khz RFID reader (UART version) but it seems it is broken.
I already tried/observed:
- I can see (with a jyetech scope) a 125Khz signal on ant1 en ant2 connections. This is distorted when a card is nearby (tried multiple cards, all the same behaviour), so I think the tags and RF circuit/Antenna are working.
- I also looked at the rx/tx pin with this scope, but I only see some garbage during startup and then pulled to Vcc. But no changes in voltage (i.e. no digital signal) when a card is present or not, swiped etc.
What is wrong or did I got an DAO?