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ESP32-S3FH4R2 (4MB flash, 2MB PSRAM, native USB-CDC) with an LR1121. Pins, the DIO5/DIO6 RF switch table and the 1.8 V TCXO follow the HF schematic and Waveshare's examples. Envs: repeater, room server, companion USB/BLE and KISS modem, all on min_spiffs so roles share one partition layout. Only RFO_HP_LF is wired (R4 on RFO_LP_LF is not fitted), so the new opt-in LR1121_FORCE_HP_PA flag keeps RadioLib on the HP PA at <= 14 dBm, where it would otherwise select the unconnected LP PA.