PulseSensor on ESP32-S3

LiveCyberDeck — PulseSensor RLCD

Browser installer for the Waveshare ESP32-S3-RLCD-4.2 monochrome PulseSensor dashboard. v1.0.3 · 2026-06-15

New here? The full tutorial — wiring photos, what you'll see, troubleshooting — is at pulsesensor.com/pages/waveshare-rlcd.

Install Firmware

Use Chrome, Edge, or Brave on a desktop or laptop.

Open this page in Chrome, Edge, or Brave on a desktop or laptop. WebSerial is blocked. Make sure the page is loaded over HTTPS.
  1. Flashing mode: hold BOOT, tap RST while holding BOOT, then release BOOT. (The ESP32-S3 native USB doesn't auto-reset into the bootloader.)
  2. Click Install and pick the board's USB serial port.
  3. It erases, flashes, and reboots into the dashboard.

Wiring

PulseSensor wireWaveshare rear header
Red / +V3V3
Black / GNDGND
Purple / SignalGP1 / GPIO1 / ADC1_CH0

Use 3V3, not VBUS, for sensor power — VBUS can clip or flatten the waveform.