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pyserial writes on Ubuntu but not Mac

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0

In a virtual environment with python version 3.5.2 and pyserial version 3.4, I am unable to write 10 bytes. I am sniffing the bus with a Salae logic analyzer. The same code and hardware works on an Ubuntu 16 virtual machine but NOT on the host Mac directly.

UART_DEVICE = '/dev/ttyUSB0' # '/dev/tty.usbserial-DN04ARYR'

class MyClass():

 def __init__(self, port, baudrate=9600, timeout=0.5):
 self._serial = serial.Serial()
 self._serial.port = port
 self._serial.baudrate = baudrate
 self._serial.timeout = timeout
 self._serial.open()

 def __del__(self):
 self._serial.close()

 def send_test_packet(self):
 packet = bytearray([0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0A])
 print('About to write '.format(packet.hex()))
 #num_bytes_written = os.write(self._serial.fd, packet)
 num_bytes_written = self._serial.write(packet)
 print("sent bytes".format(num_bytes_written))

mc = MyClass(UART_DEVICE)
mc.send_dummy_packet()

Python and pyserial version:

$ python --version
Python 3.5.2

$ pip freeze
pyserial==3.4

MacOS version: 10.14.3

python-3.x pyserial

share|improve this question

edited Mar 26 at 15:11

tarabyte

asked Mar 25 at 21:27

tarabytetarabyte

5,46788 gold badges4848 silver badges7171 bronze badges

add a comment | 

0

In a virtual environment with python version 3.5.2 and pyserial version 3.4, I am unable to write 10 bytes. I am sniffing the bus with a Salae logic analyzer. The same code and hardware works on an Ubuntu 16 virtual machine but NOT on the host Mac directly.

UART_DEVICE = '/dev/ttyUSB0' # '/dev/tty.usbserial-DN04ARYR'

class MyClass():

 def __init__(self, port, baudrate=9600, timeout=0.5):
 self._serial = serial.Serial()
 self._serial.port = port
 self._serial.baudrate = baudrate
 self._serial.timeout = timeout
 self._serial.open()

 def __del__(self):
 self._serial.close()

 def send_test_packet(self):
 packet = bytearray([0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0A])
 print('About to write '.format(packet.hex()))
 #num_bytes_written = os.write(self._serial.fd, packet)
 num_bytes_written = self._serial.write(packet)
 print("sent bytes".format(num_bytes_written))

mc = MyClass(UART_DEVICE)
mc.send_dummy_packet()

Python and pyserial version:

$ python --version
Python 3.5.2

$ pip freeze
pyserial==3.4

MacOS version: 10.14.3

python-3.x pyserial

share|improve this question

edited Mar 26 at 15:11

tarabyte

asked Mar 25 at 21:27

tarabytetarabyte

5,46788 gold badges4848 silver badges7171 bronze badges

add a comment | 

In a virtual environment with python version 3.5.2 and pyserial version 3.4, I am unable to write 10 bytes. I am sniffing the bus with a Salae logic analyzer. The same code and hardware works on an Ubuntu 16 virtual machine but NOT on the host Mac directly.

UART_DEVICE = '/dev/ttyUSB0' # '/dev/tty.usbserial-DN04ARYR'

class MyClass():

 def __init__(self, port, baudrate=9600, timeout=0.5):
 self._serial = serial.Serial()
 self._serial.port = port
 self._serial.baudrate = baudrate
 self._serial.timeout = timeout
 self._serial.open()

 def __del__(self):
 self._serial.close()

 def send_test_packet(self):
 packet = bytearray([0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0A])
 print('About to write '.format(packet.hex()))
 #num_bytes_written = os.write(self._serial.fd, packet)
 num_bytes_written = self._serial.write(packet)
 print("sent bytes".format(num_bytes_written))

mc = MyClass(UART_DEVICE)
mc.send_dummy_packet()

Python and pyserial version:

$ python --version
Python 3.5.2

$ pip freeze
pyserial==3.4

MacOS version: 10.14.3

python-3.x pyserial

share|improve this question

edited Mar 26 at 15:11

tarabyte

asked Mar 25 at 21:27

tarabytetarabyte

5,46788 gold badges4848 silver badges7171 bronze badges

UART_DEVICE = '/dev/ttyUSB0' # '/dev/tty.usbserial-DN04ARYR'

class MyClass():

 def __init__(self, port, baudrate=9600, timeout=0.5):
 self._serial = serial.Serial()
 self._serial.port = port
 self._serial.baudrate = baudrate
 self._serial.timeout = timeout
 self._serial.open()

 def __del__(self):
 self._serial.close()

 def send_test_packet(self):
 packet = bytearray([0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0A])
 print('About to write '.format(packet.hex()))
 #num_bytes_written = os.write(self._serial.fd, packet)
 num_bytes_written = self._serial.write(packet)
 print("sent bytes".format(num_bytes_written))

mc = MyClass(UART_DEVICE)
mc.send_dummy_packet()

$ python --version
Python 3.5.2

$ pip freeze
pyserial==3.4

share|improve this question

edited Mar 26 at 15:11

tarabyte

asked Mar 25 at 21:27

tarabytetarabyte

5,46788 gold badges4848 silver badges7171 bronze badges

share|improve this question

edited Mar 26 at 15:11

tarabyte

asked Mar 25 at 21:27

tarabytetarabyte

5,46788 gold badges4848 silver badges7171 bronze badges

asked Mar 25 at 21:27

tarabytetarabyte

5,46788 gold badges4848 silver badges7171 bronze badges

asked Mar 25 at 21:27

tarabytetarabyte

5,46788 gold badges4848 silver badges7171 bronze badges