test fix lora configuration and transmission

main.py

@@ -378,12 +378,40 @@ class LoRaGSStateMachine:
     # --- Hardware Interface Stubs ---
     # You will need to implement these using LoRaRF or your chosen SPI library
 
-    def lora_transmit_timeout(self, data: bytes, timeout_ms: int, force: bool) -> bool:
+#    def lora_transmit_timeout(self, data: bytes, timeout_ms: int, force: bool) -> bool:
-        """Transmit packet over SPI to SX1262 and update self.last_tx_time."""
+#        """Transmit packet over SPI to SX1262 and update self.last_tx_time."""
-        # TODO: Implement via LoRaRF
+#        # TODO: Implement via LoRaRF
+#        LoRa.beginPacket()
+#        LoRa.write(list(data), len(data))
+#        LoRa.endPacket(timeout_ms * 64)
+#        self.last_tx_time = self.now_ms()
+#        return True
+    def lora_transmit_timeout(
+        self,
+        data: bytes,
+        timeout_ms: int,
+        force: bool
+    ) -> bool:
+
         LoRa.beginPacket()
         LoRa.write(list(data), len(data))
-        LoRa.endPacket(timeout_ms * 64)
+
+        # timeout is already in milliseconds.
+        if not LoRa.endPacket(timeout_ms):
+        print("Failed to start LoRa TX")
+        return False
+
+        # endPacket() is asynchronous. DO NOT enter RX until TX is done.
+        if not LoRa.wait(timeout_ms / 1000.0):
+        print("LoRa TX host timeout")
+        return False
+
+        status = LoRa.status()
+
+        if status != LoRa.STATUS_TX_DONE:
+        print(f"LoRa TX failed, status={status}")
+        return False
+
         self.last_tx_time = self.now_ms()
         return True
 
@@ -435,7 +463,17 @@ def main():
     LoRa.setLoRaModulation(spreading_factor,EU868_BANDS[band].ch_bw_khz*1000, coding_rate, False)
     LoRa.setTxPower(10, LoRa.TX_POWER_SX1262)
     LoRa.setRxGain(LoRa.RX_GAIN_BOOSTED)
-    LoRa.setHeaderType(LoRa.HEADER_EXPLICIT)
+    #LoRa.setHeaderType(LoRa.HEADER_EXPLICIT)
+    LoRa.setLoRaPacket(
+        LoRa.HEADER_EXPLICIT,
+        8,       # preamble symbols: match RadioLib
+        15,      # sync/connect/accept packet length
+        True,    # CRC enabled
+        False    # normal IQ
+    )
+    # Explicitly make the sync word identical on both radios.
+    LoRa.setSyncWord(0x12)
+
     print("LoRa parameters set")
 
     state_machine = LoRaGSStateMachine(LORA_GS_ID, LORA_FC_ID)