CM3-Panel-7-poe technical documentation Buy
$ lsusb
Result:
Bus 001 Device 006: ID 0bda:8153 Realtek Semiconductor Corp. RTL8153 Gigabit Ethernet Adapter
Bus 001 Device 008: ID 067b:2303 Prolific Technology, Inc. PL2303 Serial Port
Bus 001 Device 005: ID 2109:2813 VIA Labs, Inc.
Bus 001 Device 003: ID 0424:ec00 Standard Microsystems Corp. SMSC9512/9514 Fast Ethernet Adapter
Bus 001 Device 002: ID 0424:9514 Standard Microsystems Corp. SMC9514 Hub
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
This ID is the serial port adapter where, 067b is idVendor and the second number 2303 is idProduct.
$ udevadm info /dev/ttyUSB0 | grep "ID_PATH="
Result:
pi@panel7:~/app $ udevadm info /dev/ttyUSB0 | grep "ID_PATH="
E: ID_PATH=platform-3f980000.usb-usb-0:1.4.2:1.0
$ sudo nano /etc/udev/rules.d/99-usb-serial.rules
This is content:
ENV{ID_PATH}=="platform-3f980000.usb-usb-0:1.4.2:1.0", SUBSYSTEM=="tty", ATTRS{idVendor}=="067b", ATTRS{idProduct}=="2303", SYMLINK+="ttyS01", GROUP="dialout", MODE="0666"
Now disconnect the adapter and reconnect to the same port.
Now we’ll have a new serial device called /dev/ttyS01.
Run command:
$ pip install termcolor
Launch this command:
$ nano /home/app/serialmonitor.py
Insert:
#!/usr/bin/python
import time
import os
import serial.tools.list_ports as ports
from termcolor import colored, cprint # ( Require --> pip install termcolor )
while True:
time.sleep(.2)
os.system("clear")
print "===================================================================="
cprint(' FIX SERIAL USB ADAPTER - PORT MONITOR', 'blue', attrs=['bold', 'blink'])
print "===================================================================="
ser_ports = list(ports.comports()) # List serial port
cprint('\nUSB Serial Port device:', 'blue', attrs=['bold', 'blink'])
for i in ser_ports:
vn = i.device
p = time.strftime("%Y-%m-%d %H:%M:%S") + "\t" + vn
if ( vn.find('ttyS') > 0 ):
cprint(p + ' - (Use this port)', 'green', attrs=['bold'])
else:
cprint(p, 'red', attrs=['bold'])
cprint('\nSimlink Serial Port:', 'yellow', attrs=['bold', 'blink'])
os.system("ls -la /dev/tty* | grep \" ->\"")
time.sleep(.2)
Run this command:
$ chmod +x /home/pi/serialmonitor.py
$ ./home/pi/serialmonitor.py
Result:
====================================================================
FIX SERIAL USB ADAPTER - PORT MONITOR
====================================================================
USB Serial Port device:
2021-09-14 16:30:33 /dev/ttyS01 - (Use this port)
2021-09-14 16:30:33 /dev/ttyUSB0
2021-09-14 16:30:33 /dev/ttyAMA0
Simlink Serial Port:
lrwxrwxrwx 1 root root 7 Sep 14 16:30 /dev/ttyS01 -> ttyUSB0