- Custom Development
Some circuits (Execute, Rigid, Pocket, etc.) have a bank of green LEDs indicating the status of each power supply. In some occasions the silkscreen will indicate which is which, but in other cases the user will have to refer to the schematic and PCB layout files. These LEDs are only used to diagnose power issues, or broken circuitry. In normal operation, with a battery or a power supply connected, all LEDs should be on, with a similar intensity. Seeing one or two of them off is a sign that the circuit is powered by USB, that it's not turned ON, or that something is broken (fuse, or voltage regulator).
Each RN-42 Bluetooth module has two LEDs (one green, one red). The list below covers the typical patterns seen on our products. Please refer to the module's documentation for all the details.