You can flash firmware for your ESP32 password keyboard here:
ESP32 Imaging page
About Password Keyboard
Project files location: https://github.com/ekoslav/ESP32_Password_keyboard
This project arise from the need to use large number of periodically changing passwords (in my case between 16 hours, to monthly changes).
This simple device uses a ESP32 dev board, a 4×4 matrix keyboard, and a common cathode RGB LED.
It can be configured to use 8 x 15 passwords / macros.
The long hold on * key is used to select pages using keys 0-7.
The long hold on # key is used for different functions.
To set normal typing speed (default, 20ms delay) press and hold “#” key until LED turns white, and press “1” key.
To set slow typing speed (200 ms delay) press and hold “#” key until LED turns white, and press “2” key.
To print user manual, connect the device as BT keyboard, open Notepad (or any text editor), Press and hold “#” key until LED turns white, and press “0” key. Instructions will be typed into the text editor.
To activate WiFi press and hold “#” key until LED turns white, and press “A” key.
Once WiFi is activated, the web configuration utility can be used.
Default WiFi mode is AP – the device creates it’s own WiFi named “Macro_kbd_XXXX” where XXXX are last 4 characters of the device MAC address. Default password is “12345678”. The configuration page can be accessed at http://192.168.4.1 .
To deactivate WiFi press and hold “#” key until LED turns white, and press “3” key.
Here is how to assemble it:
All commands are accessible using the serial console:
