added rfm init error msg

main.py

@@ -1,4 +1,4 @@
-import serial, time, threading
+import serial, time, threading, subprocess
 
 import busio
 from digitalio import DigitalInOut, Direction, Pull
@@ -9,12 +9,20 @@ import adafruit_rfm9x
 CS = DigitalInOut(board.CE1)
 RESET = DigitalInOut(board.D25)
 spi = busio.SPI(board.SCK, MOSI=board.MOSI, MISO=board.MISO)
+
+try:
+    rfm = adafruit_rfm69.RFM69(spi, CS, RESET, 868.0)
+except RuntimeError as error:
+    print('RFM69 Error: ', error)
 #rfm = adafruit_rfm69.RFM69(spi, CS, RESET, 868.0)
-rfm = adafruit_rfm9x.RFM9x(spi, CS, RESET, 868.0, baudrate=20000000)
+#rfm = adafruit_rfm9x.RFM9x(spi, CS, RESET, 868.0, baudrate=20000000)
 
 addr = '/tmp/rfmtty'
 addr_client = '/tmp/rfmtty_client'
 
+baudrate = 115200
+packet_len = 251
+
 cmd=['/usr/bin/socat','-d','-d','PTY,link=%s,raw,echo=0' %
         addr, 'PTY,link=%s,raw,echo=0' % addr_client]
 socat_proc = subprocess.Popen(cmd, stdout=subprocess.PIPE, stderr=subprocess.PIPE)
@@ -46,9 +54,6 @@ def serial_port_writer(ser, rfm):
             ser.write(packet)
 
 
-baudrate = 115200
-packet_len = 251
-
 reader_thread = threading.Thread(target=serial_port_reader, args=(ser,rfm), daemon=True)
 reader_thread.start()
 writer_thread = threading.Thread(target=serial_port_writer, args=(ser,rfm), daemon=True)
@@ -63,6 +68,7 @@ except KeyboardInterrupt:
     print("Programm durch Benutzer unterbrochen.")
 
 finally:
+    socat_proc.kill()
     ser.close()
     reader_thread.join()
     writer_thread.join()