Web Tachometer

ESP32 based web monitoring of RPM via hall effect sensors

Bill of Materials

• ESP32 Development Board
• A3144 Hall Effect Sensors (2)
• SSD1306 128x64 OLED Display

Wiring/Construction

• Connect the A3144 data pins to GPIO 17 and 18 (internal pullup is used, so no need to add one)
• Connect the SSD1306 SDA pin to GPIO 21 and SCL pin to GPIO 22

Software/Firmware Installation

• Edit auth.h to connect to a local wifi network
• Upload to an ESP development board via the Arduino IDE

-- Yuri - Aug 2021