Web Installer

PulseSensor CYD Dashboard

Install the PulseSensor heartbeat dashboard on an ESP32 Cheap Yellow Display — right from your browser.

Looking for the full tutorial with screenshots and Playground tie-ins? Visit pulsesensor.com/pages/cyd.

⚡ Flash Firmware

Connect the CYD over USB, use Chrome, Edge, or Brave, then choose the serial port when prompted.

⚠️ This browser doesn't support WebSerial. Use Chrome, Edge, or Brave on a desktop or laptop. ⚠️ WebSerial blocked. Make sure this page is loaded over HTTPS.

Wire The PulseSensor

PulseSensor Wire	CYD Connection
RED (+V)	`3.3V` on CN1
BLACK (GND)	`GND` on P3 or CN1
PURPLE (Signal)	`GPIO 35` on P3

Use 3.3V, not 5V. The PulseSensor signal must go to GPIO 35.

What You'll See

Live waveform — cyan while searching, white when beats are qualified.
BPM, IBI, a 12-step signal-quality meter, and detector re-arm count.
Animated heart, rear red LED blink, and heartbeat tone on every qualified beat.
Touch volume controls in the header (default 1/10).

Arduino IDE One-File Sketch

The firmware is intentionally kept in one Arduino sketch file: PulseSensor_CYD.ino.

1. Download PulseSensor_CYD.ino.
2. Make a folder named PulseSensor_CYD.
3. Put PulseSensor_CYD.ino inside that folder.
4. Open PulseSensor_CYD.ino in Arduino IDE.
5. Install the ESP32 board package.
6. Install TFT_eSPI, PulseSensor Playground, and XPT2046_Touchscreen.
7. Configure TFT_eSPI for the CYD display.
8. Select an ESP32 board and upload at 115200.