PCM programmer
Joined: 06 Sep 2003 Posts: 21308
|
|
Posted: Sat Jul 27, 2019 12:52 pm |
|
|
bharath0209 wrote: |
// Note:Connect MFRC522 module to 5v PIC without any Level converter.
// It'll work fine.
I had to increase the supply voltage to 3.7 volts for it to work perfectly.
|
This strongly indicates a level-shifter issue. You are probably missing the
level shifter circuits. Look at the schematic for your MFRC522 product.
Does it have built-in level shifter circuits ? |
|