PulseSensor heart-rate dashboard for the Waveshare ESP32-S3-RLCD-4.2 (ST7305 400x300 reflective LCD).
Browser-flash via ESP Web Tools: https://worldfamouselectronics.github.io/esp32-s3-RLCD-4.2/ — put the board in download mode (hold BOOT, tap RST, release BOOT), then Install.
Tutorial: https://pulsesensor.com/pages/waveshare-rlcd
Firmware binaries (ESP32-S3) attached.