FluidDial-CYD Installer

Requirements

Google Chrome or Microsoft Edge (version 89+)
CYD (Cheap Yellow Display) ESP32 board
USB data cable (not charge-only)
Windows, macOS, or Linux

Web Serial is not supported in Firefox or Safari. Use Chrome or Edge.

Install Firmware

v2.1.9 — Latest Release

Connect your CYD to USB, then click one of the buttons below.
Select the correct COM port when prompted.

Your browser does not support Web Serial.
Please use Chrome or Edge.

Update — installs the latest firmware while preserving saved settings (WiFi credentials, screen-type detection, transport override, jog preferences, rotation). Use this for upgrading from a previous FluidDial-CYD install. When the installer asks, leave the "Erase device" box unchecked — ticking it wipes saved WiFi credentials.

Factory Reset — wipes the entire device including all saved settings, then installs the firmware fresh. Use this for first-time installs, or to recover from a stuck WiFi configuration. After reset you'll re-run the touch-screen detection and re-enter WiFi credentials via the captive portal.

After Installing

First boot — screen detection: the pendant will display "Capacitive — Tap the Screen" then "Resistive — Tap the Screen". Tap when your screen type is shown. The result is saved and the pendant reboots automatically — this only happens once.

Connect your CYD pendant to your FluidNC controller via UART (TX/RX). The pendant will automatically detect the controller and display axis positions, machine state, and allow jogging, homing, probing, and spindle control.

See the GitHub repository for full documentation and wiring instructions.