TRS-ECU — Comms

TRS-ECU uses the same hardware interfaces as TRS-GND. Refer to TRS-GND Comms for full interface details on the RFM95W, Ethernet Xport, LoRa module, and level shifters.

Interface Usage in ECU Role

Interface	Role in TRS-ECU
RFM95W (143 MHz LoRa)	Primary radio link to rocket
GC-XPORT-ENH (Ethernet)	Bridge to bunker network switch
SEEEDSTUDIOLORAERMINI	Secondary LoRa / redundancy
FC Switch	Not active
USB-C	Debug / flashing only

Network Topology

[TRS-ECU - Bunker] <── [RFM95W 143 MHz LoRa] ── [ECU Radio]
         ^
         │
      Ethernet
         │  
         v
[Network Switch - Bunker] <── Ethernet ──> [Router - Test Stand] <── Ethernet ──> [GSE Laptop / GUI PC]