What the finite rules cover
Finite physical-family rules and specific hub profiles are used instead of an exhaustive product database. The NXT/EV3 sensor table is directional. PU-family connector alignment does not establish stock-app support. Power Functions IR address rules apply to that stock protocol, not BLE or a similarly shaped clone.
Primary documents
- LEGO City FAQ — Powered Up versus Power Functions
- LEGO Education EV3 FAQ — NXT compatibility
- LEGO SPIKE Large Hub technical specifications
- LEGO Technic Hub 88012 — documented original app path
- Pybricks DriveBase — two rotation-sensing Motor inputs
- Pybricks motors without rotation sensors
- Official EV3 port-view example — program and physical mismatch
- LEGO — Running trains at the same time
- LEGO Power Functions IR Remote Control 8885
- LEGO app device guide
- Pybricks supported hub capabilities — runtime-specific
- LEGO Education SPIKE support timeline
Scope of each result
- Brick Motor & Sensor System Route Checker: Similar toy-brick connections can belong to different electrical and control systems. Start with the electronic family, not whether the motor mechanically fits your build.
- Powered Up Port Assignment Planner: A count of four components on four ports can still be wrong. Map each independent task to its physical socket and the port selected in the program, then inspect the conflicts.
- Power Functions IR Channel & Output Planner: A Power Functions receiver channel is shared by its red and blue outputs. Two receivers using the same channel/output address hear the same command; decide whether that sharing is intentional.
- Brick Remote, App & Program Path Selector: A motor can fit the hub while the proposed remote cannot control it. Choose the human-to-hub control path independently from the motor/sensor connection and port worksheet.
Unknown is not an established fit
Where the exact function, runtime, component or capacity is not documented, the result remains conditional. An assignment can be internally consistent without proving physical operation. Copy and print retain the user-entered evidence and the confidence boundary; analytics do not receive those entered values or labels.
Safety and maintenance
No pinout, resistor modification, cable splice, battery/current budget, motor actuation or firmware-installation procedure is provided. Hardware sales dates and app support dates differ; check LEGO Education’s current SPIKE support statement rather than assuming every retired product has no app support.
Independent site and corrections
LEGO is a trademark of the LEGO Group, which does not sponsor, authorize or endorse Cable Check Lab. Send a page URL, result and primary correction source to canghun13@naver.com.