Published April 8, 2017 © CC BY-SA

Pycom Simple Telnet

Simple Telnet client to work with Pycom boards.

BeginnerProtip2,949

Things used in this project

Hardware components

Pycom LoPy4

Pycom WiPy 3.0

Software apps and online services

python

Story

Simple Telnet

A small program I wrote to experiment with Telnet. You can just run the Python script to have an instant Telnet connection with your WiPy or LoPy. The script is setup for default Pycom credentials and address, but you can change them in the script to match custom credentials.

MicroPython v1.8.6-556-g989d5ac9 on 2017-03-30; LoPy with ESP32 
Login as: 
micro 
Password: 
Login succeeded! 
Type "help()" for more information. 
>>> print('hello world') 
hello world 
>>> print('hi\nuser') 
hi 
user 
>>> for i in range(5): 
...     print(i) 
... 
>>> 
0 
1 
2 
3 
4 
>>>

PyMakr is end-of-life; Putty will also work, but entering in the details or selecting the correct device from the list, entering the username, password and reconnecting etc. can be a bit annoying sometimes.

This module might also be useful for people that do not want to install Putty or any other additional programs.

Lightweight and easy to use.

short demo

Instructions for Use

Save the Python module somewhere on your PC.

Install Python (version 2) on your PC.

Make a connection between your Wi-Fi adapter and the WiPy or LoPy

[optional: change parameters in the script, like passwords and host]

Run the script.

Limitations

Currently the script only reads new data after a command is send. An improved version supporting threading will implement live updates and more capabilities soon.

Contribute

If you want to propose changes or improvements feel free to fork me on GitHub:

Fork on Github

Code

simple_telnet.py

"""
Simple telnet client for Pycom.

Fire up a telnet connection between your pc and Lopy/Wipy with a simple
script.

No need to install additional programs (besides Python itself).
"""
import telnetlib
import time
import sys
import msvcrt


__author__ = "Rob Braggaar"
__license__ = "CC-BY-SA"

sys.ps1 = ''
sys.ps2 = ''
# timeout value for blocking operations [s]
TO = 5 

# host, 192.168.4.1 by default
host = "192.168.4.1"

# username and password for telnet
username = "micro"
password = "python"

# create telnet object
tel = telnetlib.Telnet(host, port=23, timeout=TO)

# login process
print tel.read_until("Login as: ")
print username
tel.write(username + "\r\n")
print tel.read_until("Password: ", timeout=TO)
print ''
time.sleep(1)
tel.write(password + "\r\n")
time.sleep(.5)
print tel.read_until(">>> ", timeout=TO).strip('>>> ')

# receive commands from the user as input
# send and execute commands to the pycom device and return the result
while True:
    indent = '    '
    cmd = raw_input('>>> ')
    if len(cmd) > 1:
        while cmd[-1] == ':':
            cmd += '\n' + indent + raw_input('... ' + indent)
            indent += '    '
    tel.write(cmd + '\r\n')
    time.sleep(.5)
    print (tel.read_until(">>> ", timeout=1).strip('>>> ' + cmd).strip('\r\n'))

Credits

Rob Braggaar

3 projects • 13 followers

Professional tinkerer, Node specialist and tech geek

Pycom Simple Telnet

Things used in this project

Hardware components

Software apps and online services

Story

Simple Telnet

Instructions for Use

Limitations

Contribute

Schematics

Just connect your WiPy or Lopy to a power supply

Code

simple_telnet.py

Credits

Rob Braggaar

Comments

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Pycom Simple Telnet

Pycom Simple Telnet

Things used in this project

Hardware components

Software apps and online services

Story

Simple Telnet

Instructions for Use

Limitations

Contribute

Schematics

Just connect your WiPy or Lopy to a power supply

Code

simple_telnet.py

Credits

Rob Braggaar

Comments

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