first playground of hardwareInterface.py

hardwareInterface.py

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+
+# For serial (including USB-to-serial) interfaces:
+# https://pyserial.readthedocs.io/en/latest/pyserial.html
+# Install pyserial library:
+#   python -m pip install pyserial
+# List ports:
+#   python -m serial.tools.list_ports
+
+import serial # the pyserial
+from serial.tools.list_ports import comports
+from time import sleep
+
+if __name__ == "__main__":
+    nFail=0
+    print("Testing hardwareInterface...")
+    print('Available ports:')
+    ports = []
+    for n, (port, desc, hwid) in enumerate(sorted(comports()), 1):
+        print('{:2}: {:20} {!r}'.format(n, port, desc))
+        ports.append(port)
+    if (len(ports)<1):
+        print("no ports, we cannot test anything.")
+        exit()
+    print("ok, we take the first port, " + ports[0])
+    ser = serial.Serial(ports[0], 19200, timeout=0)
+    for i in range(0, 5):
+        ser.write(b'hello world\n')
+        sleep(0.5)
+        s = ser.read(100)
+        if (len(s)>0):
+            print(str(len(s)) + " bytes received: " + str(s, 'utf-8'))
+    ser.close()
+    print("finished.")