The ButtonBoard PCB is my attempt to kill several birds with one stone. On the one hand, I’ve always been looking for a universal and easy-to-program remote control for the often very individual control options in my smart home. On the other hand, I wanted to have a simple way of equipping my projects (for example the pxlBlck project) with a physical operating option. Currently, the various pxlBlck platforms can only be controlled via the serial interface or an existing WiFi connection. Unfortunately, this means that it is difficult to give away these projects (for example) as present. At least not to people who are not interested in Arduino, electronics and co. Or at least can / want to deal with them when it is needed to adjust the different settings. I want to solve this disadvantage with the ButtonBoard.

General overview about the PCB:

Another usecase:

More info is available on my blog Nerdiy.de here: https://nerdiy.de/en/buttonboard/

Overall, the following components are installed on the ButtonBoard_V1.2:

• ESP32 Wrover-B
• DS3232M RTC
• USB-C connection including programming option for the built-in ESP32
• Micro SD card slot
• Connection option for an LDR for measuring brightness
• Voltage divider for measuring the battery or supply voltage
• ADXL345 accelerometer
• 3x QWIIC-I2C expansion port
• LiPo / LiIon charging circuit based on the MCP73831, FS8205 and DW01-P
• 12x buttons on the top of the PCB connected via a PCF8575
• 4x side buttons also connected via the PCF8575
• 24x WS2812 2x2mm LEDs next to the buttons
• Circuit board parts can be separated and installed separately