Hello everyone, I'm currently trying to make a tiny little spider bot using a raspberry pi 4 running raspberry pi OS and a Torobot USC-32 servo controller (SSC-32 clone). I've hooked up pin 8 from GPIO to RX on the servo board and I've hooked up pin 10 from GPIO to the TX on the servo board. I've gone in raspi-config and enabled serial communication and disabled login shell over serial. I've run some python scripts attempting to send commands to the servo controller but sadly nothing results in movement. I've spent a lot of time designing the little bot and I'm heartbroken I still couldn't get my raspberry pi to work with it.
Here is my initial servo control script:
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import serial
import sys
import time
ssc32 = serial.Serial('/dev/serial1', baudrate=9600, parity=serial.PARITY_NONE, stopbits=serial.STOPBITS_ONE, bytesize=serial.EIGHTBITS, timeout=1.0)
print("start")
ssc32.write(b"#4P1500\r\n") # Note the b before the string for bytes
time.sleep(2)
ssc32.write(b"#4P1600T2000\r\n")
print("end")
ssc32.close()
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and running it via sudo python3 in terminal i get this:
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Traceback (most recent call last):
File "/usr/lib/python3/dist-packages/serial/serialposix.py", line 380, in _reconfigure_port
orig_attr = termios.tcgetattr(self.fd)
termios.error: (5, 'Input/output error')
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "/home/yoshi/Desktop/PythonScripts/othertest.py", line 5, in
ssc32 = serial.Serial('/dev/serial1', baudrate=9600, parity=serial.PARITY_NONE, stopbits=serial.STOPBITS_ONE, bytesize=serial.EIGHTBITS, timeout=1.0)
File "/usr/lib/python3/dist-packages/serial/serialutil.py", line 244, in _init_
self.open()
File "/usr/lib/python3/dist-packages/serial/serialposix.py", line 329, in open
self._reconfigure_port(force_update=True)
File "/usr/lib/python3/dist-packages/serial/serialposix.py", line 383, in _reconfigure_port
raise SerialException("Could not configure port: {}".format(msg))
serial.serialutil.SerialException: Could not configure port: (5, 'Input/output error')
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So i tried running this simple script:
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import serial
try:
ssc32 = serial.Serial('/dev/serial1', baudrate=9600, timeout=1.0)
ssc32.close()
print("Serial port test successful.")
except Exception as e:
print(f"Serial port test failed: {e}")
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and as a result I got this error:
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Serial port test failed: Could not configure port: (5, 'Input/output error')
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I've tried two different sd cards with separate raspberry pi OS installs and neither of them work. My Arduino Uno works great with this servo controller over UART but I'm at my wit's end here. Any and all help/suggestions you guys might have is deeply appreciated!
submitted by /u/Yoshizwinner
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Source: https://www.reddit.com/r/raspberry_pi/c ... with_uart/