removed socat, using pty

main.py

@@ -1,4 +1,4 @@
-import serial, subprocess, time
+import serial, time, pty, os, threading
 
 import busio
 from digitalio import DigitalInOut, Direction, Pull
@@ -12,34 +12,51 @@ spi = busio.SPI(board.SCK, MOSI=board.MOSI, MISO=board.MISO)
 #rfm = adafruit_rfm69.RFM69(spi, CS, RESET, 868.0)
 rfm = adafruit_rfm9x.RFM9x(spi, CS, RESET, 868.0, baudrate=20000000)
 
-addr = '/tmp/rfmtty'
-addr_client = '/tmp/rfmtty_client'
+def serial_port_reader(ser, rfm):
+    while True:
+        ser_data = bytearray()
+        while ser.inWaiting() > 0 and len(ser_data) <= packet_len:
+            recieved_byte = ser.read(1)
+            ser_data += recieved_byte
+        if ser_data == b'':
+            pass
+        else:
+            print(f'Received serial data: {ser_data}')
+            rfm.send(ser_data)
+
+def serial_port_writer(ser, rfm):
+    while True:
+        packet = None
+        packet = rfm.receive()
+        if packet is None:
+            pass
+        else:
+            print(f'Received lora RSSI: {rfm.last_rssi} SNR: {rfm.last_snr} data: {packet}')
+            ser.write(packet)
+
+
 baudrate = 115200
+packet_len = 251
 
-cmd=['/usr/bin/socat','-d','-d','PTY,link=%s,raw,echo=0,b%d' %(addr, baudrate), 'PTY,link=%s,raw,echo=0,b%d' %(addr_client, baudrate)]
-socat_proc = subprocess.Popen(cmd, stdout=subprocess.PIPE, stderr=subprocess.PIPE)
-time.sleep(1)
+master, slave = pty.openpty()
+port_name = os.ttyname(slave)
+print("Serieller Port: %s" % port_name)
+ser = serial.Serial(port_name, baudrate=baudrate)
 
-ser = serial.Serial(addr, baudrate=baudrate)
+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)
+writer_thread.start()
 
-packet_len = 120
-while True:
-    packet = None
-    packet = rfm.receive()
-    ser_data = bytearray()
-    while ser.inWaiting() > 0 and len(ser_data) <= packet_len:
-        recieved_byte = ser.read(1)
-        ser_data += recieved_byte
-    if ser_data == b'':
+try:
+    while True:
         pass
-    else:
-        print(f'Received serial data: {ser_data}')
-        rfm.send(ser_data)
-    if packet is None:
-        pass
-    else:
-        print(f'Received lora data: {packet}')
-        print(f'RSSI: {rfm.last_rssi} SNR: {rfm.last_snr}')
-        ser.write(packet)
 
-socat_proc.kill()
+
+except KeyboardInterrupt:
+    print("Programm durch Benutzer unterbrochen.")
+
+finally:
+    virtual_serial_port.close()
+    reader_thread.join()
+    writer_thread.join()