Radio and RFID reader don't play well together.

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i have rfid_rfc522 rfid reader, , rfm22b 415 mhz. transceiver sharing same nano. these both spi devices, , understand if chip select line high on either one, should not interfere communication between nano , other unit.  find radio works if don't initialize rfid unit.  , vice versa.   

it seem if set chip select lines of these units 1 high, , 1 low, 1 active @ time.  doesn't seem work.  so, 2 questions.

1.  there mode rfid reader reports card present interrupt:  mean not using spi interface until go read it?

2.  there picc_halta command mentioned in library:  shut unit down , free spi radio?

unfortunately, library not particularly tutorial, if has experience similar problem, i'd hear solutions.



Arduino Forum > Using Arduino > Sensors > Radio and RFID reader don't play well together.


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