"the ordered comparison of pointer with integer zero" Fix for RP2040 (earlephilhower core > 3.3x)
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madias123 commented
On newer cores, the library won't compile -> " the ordered comparison of pointer with integer zero"
to get rid of this, change in MFRC522Extended.cpp
the lines 824 and 847 from:
if (backData && (backLen > 0))
into
if (backData && (backLen != nullptr))