| 5V-USB from cable | Indicates whether or not the USB cable provides voltage to the circuit board |
| UART: TX, RX, PWR | Indicates data transfer via the serial port |
| RF: PWR | Indicates whether or not the radio circuit is on |
| MCU: PWR, MON | Indicates the status of the microprocessor |
| ANT: EXT, INT | Indicates the antenna being used |
| USB hub powered | Indicates whether or not the USB converter gets voltage |
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