The PiBot CNC Pendant V1 is the reference board for ESP3D-X development. It is an ESP32-based pendant designed to provide a comprehensive and versatile user interface for CNC machines.
Specifications
Section titled “Specifications”- MCU: ESP32 (4 MB or 8 MB flash variants)
- Display: 3.2” color TFT (320 × 240)
- Touch: Capacitive touch controller (FT6336U)
- Inputs:
- Rotary encoder
- 3 physical buttons
- 4-position switch
- 10K potentiometer (analog input)
- Audio: Passive buzzer (SC8002B)
- Storage: MicroSD card interface
- Connectivity: Bluetooth (BLE / BTSerial), WiFi, Serial
ESP32 GPIO Configuration
Section titled “ESP32 GPIO Configuration”GPIO Function Table
Section titled “GPIO Function Table”| GPIO | Function | Component | Description |
|---|---|---|---|
| GPIO0 | BOOT | System | Boot mode selection pin (strapping pin) |
| GPIO1 | TX0 | System UART0 | Serial interface transmit line |
| GPIO2 | TFT_DC | TFT Screen | Data/Command Select for display |
| GPIO3 | RX0 | System UART0 | Serial interface receive line |
| GPIO4 | Button 1 | Button Matrix | Button with direct ground connection |
| GPIO5 | SD_CS | MicroSD Card | Chip Select for microSD |
| GPIO6–11 | SPI Flash | System | Internal SPI flash connection, not available |
| GPIO12 | TFT_MISO | TFT Screen | Master In Slave Out for display |
| GPIO13 | TFT_MOSI | TFT Screen | Master Out Slave In for display |
| GPIO14 | TFT_CLK | TFT Screen | SPI Clock for display |
| GPIO15 | TFT_CS | TFT Screen | Chip Select for display |
| GPIO16 | Button 2 | Button Matrix | Button with direct ground connection |
| GPIO17 | Button 3 | Button Matrix | Button with direct ground connection |
| GPIO18 | SD_CLK | MicroSD Card | Clock signal for microSD |
| GPIO19 | SD_MISO | MicroSD Card | Master In Slave Out for microSD |
| GPIO21 | TFT_LED | TFT Screen | Backlight Control |
| GPIO22 | Encoder A | Rotary Encoder | A signal (no pull-up resistors) |
| GPIO23 | SD_MOSI | MicroSD Card | Master Out Slave In for microSD |
| GPIO25 | TOUCH_SCL | Touch Controller | I2C Clock for FT6336U |
| GPIO26 | Buzzer | Audio | Passive buzzer (SC8002B) |
| GPIO27 | Encoder B | Rotary Encoder | B signal (no pull-up resistors) |
| GPIO32 | TOUCH_SDA | Touch Controller | I2C Data for FT6336U |
| GPIO33 | Analog Input | Potentiometer | Center tap of 10K potentiometer |
| GPIO34 | Switch Pos 1 | 4-Position Switch | With 10K pull-up resistor |
| GPIO35 | Switch Pos 2 | 4-Position Switch | With 10K pull-up resistor |
| GPIO36 | TOUCH_IRQ | Touch Controller | Interrupt signal from FT6336U |
| GPIO39 | Switch Pos 3 | 4-Position Switch | With 10K pull-up resistor |
Schematics
Section titled “Schematics”
Build variants
Section titled “Build variants”The PiBot V1 supports multiple build variants combining memory size, connectivity, and target firmware:
| Variant | Flash | Connectivity | Target |
|---|---|---|---|
4mb_wifi_fluidnc | 4 MB | WiFi | FluidNC |
4mb_bt_fluidnc | 4 MB | Bluetooth | FluidNC |
8mb_wifi_fluidnc | 8 MB | WiFi | FluidNC |
8mb_wifi_grblhal | 8 MB | WiFi | grblHAL |
8mb_bt_fluidnc | 8 MB | Bluetooth | FluidNC |
8mb_bt_grblhal | 8 MB | Bluetooth | grblHAL |