The telescope should return something of the format "HH:MM:T#" or "HH:MM:SS" depending on which "precision" is set for the telescope.
Why do you preface your command with "#" that is the end of command marker. If you have a document that says this is a valid command please post a link. I do not see "hello" among the commands understood by the telescope. I don't have an ETX telescope, but from watching a short video on how to communicate with the telescope using a serial emulator and reading the LX200CommandSet.pdf describing the command protocol I don't think you can use readline because the software does not send responses terminated by "\n".
#Putty, when I send #:GR# I receive 19:00:21# #instr = ser.readline().strip().decode("utf-8") #Note 2 All I get is b' ' ? I find very little good documentation of these functions. If I send "#:GR# " I should receive "19:00:21#" The program runs and I think I am sending out the string #:GR# but the serial. I have tested the comm link using Putty and Tera term and COM3 is working properly. Timeout=self.timeout,*_args,**self.I am trying to get pyserial to send/receive ascii text to/from Meade ETX-90 telescope. rial = serial.Serial(dsrdtr=False, rtscts=False, port=self.port, baudrate=self.baudr$ This doesn't work correctly on the /dev/ttyUSB3, the hardware handshake criteria must be disabled, as is in the default configuration, they are not managed: def connect(self): rial = serial.Serial(dsrdtr=True, rtscts=True, port=self.port, baudrate=self.baudr$ """ Connects to the device and starts the read thread """ Some programs initialize pyserial in this way def connect(self): This serial port is slightly different from the Raspberry PI3 /dev/ttyAMA0. Will print a list of available serial ports. Print("Tx counter = %d | Rx counter = %d | Received: %s %02x" % (tx_counter,rx_counter,a,ord(a))) Ser.write("Tx counter = %d | Rx counter = %d | Received: %s %02x\n\r" % (tx_counter,rx_counter,a,ord(a))) Print("Tx counter = %d | Rx counter = %d" % (tx_counter,rx_counter)) Ser.write("Tx counter = %d | Rx counter = %d\n\r" % (tx_counter,rx_counter))
If any character is received from a remote serial terminal. This example sends a string on the serial port each 1 second at 115200,N,8,1 and checks Install the Python serial library: sudo apt-get update This port is visible in Linux as /dev/ttyUSB3 device.
The signals are available on screw terminals as visible below and are at 3.3 volt level. A serial port interface at 3.3 volt is available on the CM3-Home to connect external microcontrollers like Arduino or ESP8266.
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