New! Alpha version of the blynk-library for Python!

[Muhammad_Fitri]

@Gunner
I seem to have a new problem…
I can’t import BlynkLib.
It says, "ImportError : No module named ‘BlynkLib’
Im not sure if anything’s missing or something, but I followed all the steps from here, https://github.com/vshymanskyy/blynk-library-python

[Gunner]

@Muhammad_Fitri Sorry, I know nothing about Python. I have moved your question here instead.

Be aware, this is an Alpha test and for…

@vshymanskyy

EXPERT USE ONLY!

[Muhammad_Fitri]

[Muhammad_Fitri]

thanx @Gunner

[Muhammad_Fitri]

@vshymanskyy, from the code you gave at github, how do i set the virtual pin i need to use??

import BlynkLib
import time

BLYNK_AUTH = 'YourAuthToken'

# Initialize Blynk
blynk = BlynkLib.Blynk(BLYNK_AUTH)

# Register Virtual Pins
@blynk.VIRTUAL_WRITE(1)
def my_write_handler(value):
    print('Current V1 value: {}'.format(value))

@blynk.VIRTUAL_READ(2)
def my_read_handler():
    # this widget will show some time in seconds..
    blynk.virtual_write(2, time.ticks_ms() // 1000)

# Start Blynk (this call should never return)
blynk.run()

[vshymanskyy]

@Muhammad_Fitri please pay attention to code formatting when using our forum.
And read this carefully!

[README] Welcome to Blynk Community!

Hey, welcome to Blynk Community. This is the best place to ask questions, leave feedback and share your ideas. If this is the first time you hear about Blynk, check out our website www.blynk.cc and come back! As the community is big (and growing), let’s agree on some basic rules. Asking for help Before creating a new topic and asking for help, please check if your question was already answered: Use forum search function You may want to check out: Blynk Documentation Blynk Wiki Blynk Exa…

I think the code is self-explanatory - what exactly question do you have?

[mDSP]

Hi,

it all works fine for Virtual Pin 1 but if I add more pins then I get the following message

Warning: Virtual write to unregistered pin 2

How can I deal with this?

best
mDSP

[Gunner]

@mDSP

but if I add more pins then I get the following message

Warning: Virtual write to unregistered pin 2

This is probably becasue you didn’t register pin 2

Start by showing your entire modified & formatted code, otherwise we are guessing at what you did or didn’t do

[mDSP]

Thank you for your reply!

Well. I thought it should work like this (but obviously it doesn’t)

import BlynkLib
import random
import OSC
import time

client = OSC.OSCClient()
client.connect( ( '127.0.0.1', 57120 ) )
msg = OSC.OSCMessage()
msg.setAddress("/print")


BLYNK_AUTH = 'aca20018b97740a59389ca8b47c7baae'

# Initialize Blynk
blynk = BlynkLib.Blynk(BLYNK_AUTH)

# Register Virtual Pins
@blynk.VIRTUAL_WRITE(1)
def my_write_handler(value):
	print('Current V1 value: {}'.format(value))

@blynk.VIRTUAL_WRITE(2)
def my_write_handler(value):
    print('Current V2 value: {}'.format(value))


@blynk.VIRTUAL_READ(2)
def my_read_handler():
    # this widget will show some time in seconds..
    blynk.virtual_write(2, time.ticks_ms() // 1000)

# Start Blynk (this call should never return)
blynk.run()

[Gunner]

@mDSP

def my_write_handler(value):

I have absolutely no idea how Python works… but as a guess with what looks like the actual defining command… you might try something like (value2) as (value) is already taken for the first pin?

[mDSP]

Unfortunately it does not work. I did tried it also before. I am wondering where can I register the pins? Even if I use just pin2 in first place without anything else I get the same error. It seems I can get values only from pin1.

any ideas?

[mDSP]

its absolutely mad but is seems it works for pin3! I will check others and report.

[mDSP]

Yes, it seems it is just pin2 not working! I randomly tried 2-3 others and it works!

[Gunner]

Looking at other examples in the Blynk Python Library (above), it seems that defining a virtual pin is determined by the initial wording, not the word (value)…

def my_write_handler(value):
def v3_write_handler(value):
def v4_write_handler(value):

etc.

[Gunner]

@mDSP

it seems it is just pin2 not working!

@mDSP

@blynk.VIRTUAL_READ(2)
def my_read_handler():
# this widget will show some time in seconds…
blynk.virtual_write(2, time.ticks_ms() // 1000)

Also… you are already using V2 (or just pin 2) in this command… for the uptime display.

[mDSP]

Ah I am so silly, I did not pay any attention that I am using already VP2. I just cope/pasted the code and forgot the last lines.

Thank you for pointing it out anyway!

[mDSP]

Hi again,

I have just noticed that when I use the library the CPU goes 100% on RPi3

Strange isn’t it?

[vshymanskyy]

For an alpha version, it is not strange

[mDSP]

Hi vhymanskyy,

first of all thank you so much for providing the library!

I was just wondering if it is something related to my own Pi configuration.

Is it related to very fast refresh rates?

Generally I need to link my Pi to blink cloud in order to forward Virtual Pin data
to SC though OSC (Open Sound communication). This is going to be a non stop
running installation so do you think I should move for now to the node.js version?
Is that more efficient CPU-wise?

Best
mDSP

[vshymanskyy]

Node.js is better in 2 ways:

1. the Blynk library is tested better
2. JavaScript is event-driven by it’s nature

If you don’t have intensive computations in your code/libraries you use, I wouldn’t be concerned about Node.js or Python usage at all.