Connecting Raspberry Pico W to Blynk with WiFi

Solved
1

Hello everyone!
Need help with connecting Pico W to Blynk with WiFi. Raspberry Pico W is a new platform for modelling, and i don`t find docs for blink connecting.
I use these example https://github.com/blynkkk/lib-python/blob/master/examples/raspberry/01_weather_station_pi3b.py

Sensor BME280 is working but Pico W don`t connecting to Blynk
I use blynklib ver.0.2.6
Maybe you will find an error in my code

from machine import Pin, I2C
import time 
import bme280
import blynklib
import network

ssid = '****'
password = '******'

wlan = network.WLAN(network.STA_IF)
wlan.active(True)
wlan.connect(ssid, password)
# Wait for connect or fail
max_wait = 10
while max_wait > 0:
    if wlan.status() < 0 or wlan.status() >= 3:
        break
    max_wait -= 1
    print('waiting for connection...')
    time.sleep(1)

# Handle connection error
if wlan.status() != 3:
    raise RuntimeError('network connection failed')
else:
    print('connected')
    status = wlan.ifconfig()
    print( 'ip = ' + status[0] )

BLYNK_AUTH='token'

blynk = blynklib.Blynk(BLYNK_AUTH)

T_VPIN = 1
P_VPIN = 2
H_VPIN = 3

@blynk.handle_event('read V{}'.format(T_VPIN))
def read_handler(vpin):
    i2c=I2C(0,sda=Pin(0), scl=Pin(1), freq=400000)
    bme = bme280.BME280(i2c=i2c)
    temperature = bme.values[0]
    pressure = bme.values[1]
    humidity = bme.values[2]
    blynk.virtual_write(T_VPIN, temperature)
    blynk.virtual_write(P_VPIN, pressure)
    blynk.virtual_write(H_VPIN, humidity) 

while True:
    blynk.run()
2

Are you using Blynk IoT, or Blynk Legacy?

What does your serial monitor show?

Pete.

1 Like
3

Blynk IoT
I am using Thonny IDE and in shell shows only successful connection to wifi
``
connected
ip = 192.168.1.6

    ___  __          __
   / _ )/ /_ _____  / /__
  / _  / / // / _ \/  '_/
 /____/_/\_, /_//_/_/\_\
        /___/ for Python v0.2.6

``

4

In this case you should update the library to the latest version (1.0.0)

You can use this command

pip install blynk-library-python

To install the library, but for some reason it doesn’t pull the latest version of the library, so after installing the library, you have to download the files and move them to the library directory manually.

1 Like
5

Yes, thats it! Thank you.
My final working sketch


from machine import Pin, I2C
import time
import bme280
import BlynkLib
import network

ssid = '****' # wifi 
password = '****' #password

wlan = network.WLAN(network.STA_IF)
wlan.active(True)
wlan.connect(ssid, password)
# Wait for connect or fail
max_wait = 10
while max_wait > 0:
    if wlan.status() < 0 or wlan.status() >= 3:
        break
    max_wait -= 1
    print('waiting for connection...')
    time.sleep(1)

# Handle connection error
if wlan.status() != 3:
    raise RuntimeError('network connection failed')
else:
    print('connected')
    status = wlan.ifconfig()
    print( 'ip = ' + status[0] )

BLYNK_AUTH='******'

blynk = BlynkLib.Blynk(BLYNK_AUTH)

T_VPIN = 1 #Virtual Pin 1, Gauge temperature
P_VPIN = 2 #Virtual Pin 2, Gauge pressure
H_VPIN = 3 #Virtual Pin 3, Gauge humidity

i2c=I2C(0,sda=Pin(0), scl=Pin(1), freq=400000)
bme = bme280.BME280(i2c=i2c) #BME280 object created

while True:
    temperature = bme.values[0] #reading the value of temperature
    pressure = bme.values[1]    
    humidity = bme.values[2]    
    blynk.virtual_write(T_VPIN, float(temperature[:len(temperature)-1])) #writing to blynk virtual value
    blynk.virtual_write(P_VPIN, float(pressure[:len(pressure)-3]))
    blynk.virtual_write(H_VPIN, float(humidity[:len(humidity)-1]))
    
while True:
   blynk.run()