add rpi proxy script

scripts/rpi-proxy-fc.py

@@ -0,0 +1,80 @@
+#!/usr/bin/python
+import os
+import sys
+import serial
+import time
+import json
+
+from yamspy import MSPy
+
+## Constants
+
+# INAV Konrad custom FW
+INAV_KONRAD_MAX_NAME_LENGTH = 16
+INAV_KONRAD_SET_PILOT_NAME = 0x5000
+
+LORA_SA_PORT = "/dev/ttyS0"
+DRONE_PORT = "/dev/ttyACM0"
+
+
+def get_heading(board: MSPy) -> float:
+    board.fast_read_analog()
+    board.fast_read_attitude()
+    board.fast_read_imu()
+
+    return int(board.SENSOR_DATA["kinematics"][2]) # heading value
+
+
+def str2osd(pilot_name):
+    pilot_name_bytes = pilot_name.encode("utf-8")
+    pilot_name_bytes = pilot_name_bytes[:INAV_KONRAD_MAX_NAME_LENGTH].ljust(
+        INAV_KONRAD_MAX_NAME_LENGTH, b" "
+    )
+    return pilot_name_bytes
+
+
+with MSPy(device=DRONE_PORT, loglevel="WARNING", baudrate=115200) as board:
+    if board == 1:
+        print("Connecting to the FC... FAILED!")
+        sys.exit(1)
+    else:
+        try:
+            lora = serial.Serial(LORA_SA_PORT, 115200, timeout=5)
+        except:
+            for _ in range(10):
+                board.send_RAW_msg(
+                    INAV_KONRAD_SET_PILOT_NAME, str2osd("err: lora board")
+                )
+                time.sleep(2)
+                board.send_RAW_msg(
+                    INAV_KONRAD_SET_PILOT_NAME, str2osd("restart needed")
+                )
+                time.sleep(2)
+            sys.exit(1)
+        board.send_RAW_msg(INAV_KONRAD_SET_PILOT_NAME, str2osd("! lora sa !"))
+        time.sleep(20)
+        while True:
+            # tick every:
+            time.sleep(0.5)
+
+            # read json data from lora sa:
+            line = lora.readline()
+            if len(line) == 0:
+                continue
+
+            print(line)
+
+            try:
+                parsed = json.loads(line)
+            except:
+                time.sleep(0.5)
+                continue
+            finally:
+                if parsed is not None:
+                    low = parsed.get("low_range_freq")
+                    high = parsed.get("high_range_freq")
+                    rssi = parsed.get("value")
+                    osd_text = str2osd(f"{low}-{high}:{rssi}")
+                    board.send_RAW_msg(INAV_KONRAD_SET_PILOT_NAME, osd_text)
+                    heading = get_heading(board)
+                    lora.write(f"HEADING {heading}\n".encode("utf-8"))