HARDWARE CONNECTION · VERSION SELECTOR4.4 Connect Pendant
Choose the manual that matches the version printed on your PiBot pendant hardware. Pendant V4.2 and V4.0 use different package, RX/TX and firmware procedures.
PiBot V5.88 UltraDirect onboard RJ12 · UART2 TX GPIO.0 / RX GPIO.35 · 1,000,000 baud · OLED remains independent.
Choose by hardware version, not firmware name. Turn off the controller and machine before changing RJ12 connections. For wired use, disconnect the pendant battery exactly as required by the matching manual.
CURRENT MODEL · RECOMMENDEDPiBot CNC Pendant V4.2
Use the current complete manual for V4.2 hardware with physical RX/TX jumper selection, improved automatic download and reverse-polarity protection.
- ESP3D Wi-Fi or FluidDial ESP-NOW
- RJ12 wired UART instructions
- Current package and V02 enclosure
- Direct V5.88 Ultra connection diagram
Open V4.2 instructions for V5.88 Ultra →
PREVIOUS MODEL · LEGACYPiBot CNC Pendant V4.0
Use the preserved manual only when the pendant hardware is V4.0. It retains the earlier package, Bluetooth accessories and firmware-upload procedure.
- Original V4.0 hardware and enclosure
- Legacy RJ12 and Bluetooth methods
- Old BOOT-button upload sequence
- Historical troubleshooting and downloads
Open previous V4.0 manual →
V5.88 Ultra connection notes
Connection pathConnect Pendant V4.2 directly to the onboard RJ12 pendant port with the approved PiBot cable; no 4.x adapter is required.
UART settingsUse UART2 TX GPIO.0, RX GPIO.35, 1,000,000 baud and 8N1 for the documented wired path.
First testKeep motors, spindle and laser disabled; confirm status updates and each control before permitting real motion.