Applications
Use the Paho MQTT python library
IX14 User Guide
493
# ls /dev/serial/
by-id
by-path
by-usb
port1
#
3. At the shell prompt, use the
python
command with no parameters to enter an interactive
Python session:
# python
Python 3.6.13 (default, May
9 2021, 22:49:59)
[GCC 8.3.0] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>>
4. Import the
serial
module:
>>> import serial
>>>
5. You can now perform operations on the serial port. For example, to write a message to the
serial port:
>>> s = serial.Serial("/dev/serial/port1", 115200)
>>> s.write(b"Hello from serial port")
26
>>>
6. Use
Ctrl-D
to exit the Python session. You can also exit the session using
exit()
or
quit()
.
Use the Paho MQTT python library
Your IX14 device includes support for the Paho MQTT python library. MQTT is a lightweight messaging
protocol used to communicate with various applications including cloud-based applications such as
Amazon Web Services and Microsoft Azure. The following is example code that reads CPU and RAM
usage on the device, updates the device firmware, then publishes information about DHCP clients and
system information to the MQTT server at 192.168.1.100. The MQTT server IP is configurable.
"""
MQTT client example:
- Reporting some device metrics from runt
- Reporting DHCP clients
- Firmware update feature (simple implementation, read TODO in cmd_fwupdate)
"""
import sys
import time
import paho.mqtt.client as mqtt
import json
from acl import runt, config
from http import HTTPStatus
import urllib.request
import tempfile
import os
from digidevice import cli
