This is firmware to run on an Arduino Pro Micro (preferred) or Arduino Nano to interface a popular style of wired CNC pendant to the PanelDue port of Duet electronics. Build it using Arduino IDE.
The code on the master branch send commands with checksums to RRF, suitable for older versions RRF. If you use the PanelDue pass-through facility then you need to use an older version of PanelDueFirmware that uses checksums, because it does not recognise CRCs from PanelDue.
The code on the crc16 branch sends commands with CRC to RRF with a CRC instead. This works with newer versions of RRF and provides better integrity protection. If the PanelDue pass-through facility is used, it accepts either CRCs or checksums from PanelDue.
For a full guide to building the pendant, see the Duet3D wiki here.
Pendant to Arduino Pro Micro wiring:
| Pro Micro | Pendant | Wire colours |
|---|---|---|
| VCC | +5V | red |
| GND | 0V COM CN LED- |
black orange/black blue/black white/black |
| D2 | A | green |
| D3 | B | white |
| D4 | X | yellow |
| D5 | Y | yellow/black |
| D6 | Z | brown |
| D7 | 4 | brown/black |
| D8 | 5 | pink (if present) |
| D9 | 6 | pink/black (if present) |
| D10 | LED+ | green/black |
| A0 | STOP | blue |
| A1 | X1 | grey |
| A2 | X10 | grey/black |
| A3 | X100 | orange |
| NC | /A /B |
violet violet/black |
Arduino Pro Micro to Duet 3 IO_0 connector or Duet 2 PanelDue connector wiring (3- or 4-core cable):
| Pro Micro | Duet |
|---|---|
| VCC | +5V (red wire) |
| GND | GND (yellow wire) |
| TXO GND |
Through 6K8 resistor to IO_0_IN (Duet 3) or URXD0 (Duet 2) Also connect 10K resistor between GND and IO_0_IN (Duet 3) or URXD0 (Duet 2) (blue wire from resistor junction to Duet) |
To connect a PanelDue as well (the Arduino Pro Micro passes the PanelDue commands through to the Duet):
| PanelDue | Pro Micro / Duet |
|---|---|
| +5V | +5V/VCC (red wire to Ardiuno or Duet) |
| GND | GND (yellow wire to Ardiuno or Duet) |
| DIN | Duet IO_0_OUT (Duet 3) or UTXD0 (Duet 2) (green wire) |
| DOUT | Pro Micro RXI (blue wire of PanelDue cable to green wire of pendant cable) |
For wiring differences and hardware changes needed if using an Arduino Nano, see the comments at the start of the CNC-pendant.ino file.
Please use the forum for support requests.