Articles tagged with “esp32 pico d4”

It is sad, but not everything went smooth during my experiments with fingerprint scanners. I have desoldered fingerprint scanner from the GROW R300 device wanting to find a way to connect it to the MCU directly.

After a few weeks of waiting the postal service delivered the PCBs for the device prototype [/2019/10/14/esp32-authenticator-development-board/]. Usually, I order my boards from the JLCPCB manufacturer and the quality is very good, as always.