Rev 2.1.0

Revision 2.1.0 after customer feedback and rev 2.0 testing:

• Change UART voltage connector to 3V3
• Update optocoupler resistor values for better input voltage range
• Add satellite modem connector
• Add output logic level port for external device communication
• Add SD Card for future logging

Rev 2.0

• Change from hotwire to servo release mechanism
• Reduce the number of external inputs to 2 for size/weight savings
• Add QWIIC connector