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brianrho / GT5X

An Arduino library for the GT511C3 (and similar GT5X) optical fingerprint sensors
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Timing out try connect to sensor from esp wroom 32 #4

Open ricardo-0x07 opened 2 years ago

ricardo-0x07 commented 2 years ago

I'm getting Did not find fingerprint sensor :(

Added additional log messages and found it was due to GT5X_TIMEOUT.

It seems the esp is having issues connecting to the sensor.

Any guidance would be greatly appreciated

brianrho commented 2 years ago

Has it ever worked even once? Or do you always get that error?

Often it means you haven't connected the UART lines properly between the MCU and the sensor. So you should probably check that first -- make sure you have the right pins from both sides, connected in the right order, with the right voltage levels, and configured properly in your sketch.

ricardo-0x07 commented 2 years ago

@brianrho Thanks for your quick response. Not it has never worked. I don't have the standard cable (they are on order) so I hardwired it. I will re-check my connections until they arrive.

Thanks again