PiPico BCU Connector - OpenKNX/OpenKNX GitHub Wiki
| The PiPico BCU Connector is an adapter PCB to connect a Raspberry Pi Pico MCU Board with a NanoBCU (or MicroBCU) and has a KNX Connector, Reset- and Prog-Button and a Prog-LED. |
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- V00.02: added missing 3v3 to reset circuit, added mounting holes, added OpenKNX logo
- V00.03: added additional footprints for Prog-LED, Prog-Switch and Reset Switch on BOT (Reset and Prog Button not working due to BUG in PCB)
- V00.04: fixed bug with GND connection of Reset and Prog Button
The PiPico BCU Connector is meant for rapid building of KNX devices with no or very little external circuitry. You can solder wire terminals directly to the GPIOs and connect some sensor.
Be carefull: never connect to USB and KNX simultaneously without using a USB isolator.
There is a precompiled firmware available:
- OpenKNX-LogicModule: Turns PiPico BCU Connector in a KNX native logicmodule with 99 logic channels. You can find firmware files here, German application description here and the German support forum here.
- OpenKNX-PresenceModule: Turns PiPico BCU Connector in a KNX native module with 30 logic channels and 20 virtual presence channels. You can find firmware files here,German application description here and the German support forum here.
- Das KiCAD-Projekt incl. Gerberdaten sowie STL Dateien für das Gehäuse sind im Repository unter der freien CC-BY-NC-SA verfügbar.
- Platinen, sowie die NanoBCU können auch erworben werden, siehe Bezugsquelle-Ing-Dom
| Buttons and Program-LED Position | |||
|---|---|---|---|
| on Front | on Back | Part | |
| U1 | Raspberry Pi Pico MCU Board | ||
| GN1 | NanoBCU or MicroBCU connected with 2.54 pin headers | ||
| J1 | KNX-Connector pins (Reichelt: WAGO 243-131) | ||
| SW1, SW2 | SW3, SW4 | SMD push button 3.3x2.5 (e.g. XUNPU TS-1089S-02526) | |
| C1 | C2 | 0805 SMD MLCC 330pF | |
| R1 | R4 | 0805 SMD resistor 2k2 | |
| R2 | R5 | 0805 SMD resistor 220 | |
| R3 | R6 | 0805 SMD resistor 1k | |
| D1 | D3 | 0805 LED e.g Reichelt SMD-LED 0805 RT (mostly on the top side of the LED, cathode (-) is marked green. This side must be oriented to the closed side of the printed U around the footprint) | |
| D2 | SMAJ40CA (optional, recommend if there is no SMAJ40CA on the BCU) | ||
There is a 3D-printable case availible
| Case \ PCB | V00.01 | V00.02 | V00.03 | V00.04 |
|---|---|---|---|---|
| 001 | no | no | yes | yes |
(V00.03 is almost identical)
