Run on Raspberry Pi Pico/MicroPython, to generate QR Code, and display on
SSD1306 128x64 I2C OLED.
I2C(0) is used to connect to SSD1306 I2C, scl=9 and sda=8.
For SSD1306 driver, visit https://github.com/micropython/micropython/blob/master/drivers/display/ssd1306.py to download ssd1306.py, save to Raspberry Pi Pico driver.
For QR Code, JASchilz/uQR is used. Download uQR.py and save to Raspberry Pi Pico driver.
For SSD1306 driver, visit https://github.com/micropython/micropython/blob/master/drivers/display/ssd1306.py to download ssd1306.py, save to Raspberry Pi Pico driver.
For QR Code, JASchilz/uQR is used. Download uQR.py and save to Raspberry Pi Pico driver.
mpyPico_i2c.py, simple verify I2C(0) pins and connection to SSD1306 I2C OLED.
import uos
import usys
print("====================================================")
print(usys.implementation[0],
str(usys.implementation[1][0]) + "." +
str(usys.implementation[1][1]) + "." +
str(usys.implementation[1][2]))
print(uos.uname()[3])
print("run on", uos.uname()[4])
print("====================================================")
i2c0 = machine.I2C(0)
print(i2c0)
print("Available i2c devices: "+ str(i2c0.scan()))
print("~ bye ~")
mpyPico_ssd1306.py, simple test program for SSD1306 I2C OLED.
"""
Run on Raspbery Pi Pico/MicroPython
display on ssd1306 I2C OLED
connec ssd1306 using I2C(0)
scl=9
sda=8
- Libs needed:
ssd1306 library
https://github.com/micropython/micropython/blob/master/drivers/display/ssd1306.py
"""
import uos
import usys
from ssd1306 import SSD1306_I2C
print("====================================================")
print(usys.implementation[0],
str(usys.implementation[1][0]) + "." +
str(usys.implementation[1][1]) + "." +
str(usys.implementation[1][2]))
print(uos.uname()[3])
print("run on", uos.uname()[4])
print("====================================================")
i2c0 = machine.I2C(0)
print(i2c0)
print("Available i2c devices: "+ str(i2c0.scan()))
WIDTH = 128
HEIGHT = 64
oled = SSD1306_I2C(WIDTH, HEIGHT, i2c0)
oled.fill(0)
oled.text(usys.implementation[0], 0, 0)
strVersion = str(usys.implementation[1][0]) + "." + \
str(usys.implementation[1][1]) + "." + \
str(usys.implementation[1][2])
oled.text(strVersion, 0, 10)
oled.text(uos.uname()[3], 0, 20)
oled.text(uos.uname()[4], 0, 40)
oled.show()
mpyPico_ssd1306_uQR.py, generate QR Code using uQR.py, and display on SSD1306 I2C OLED.
"""
Run on Raspbery Pi Pico/MicroPython
to generate QR code using uQR,
and display on ssd1306 I2C OLED
- Libs needed:
ssd1306 library
https://github.com/micropython/micropython/blob/master/drivers/
display/ssd1306.py
JASchilz/uQR:
https://github.com/JASchilz/uQR
remark:
in the original example on uQR to display on ssd1306, scale of 2 is used.
It's found:
- If the data is too long, the small 128x64 OLED cannot display the whole matrix.
- In my test using my phone, scale of 1 is more easy to recognize.
Such that I use scale of 1 inside the loop to generate qr code.
"""
from uos import uname
from usys import implementation
from machine import I2C
from time import sleep
from ssd1306 import SSD1306_I2C
from uQR import QRCode
print("====================================================")
print(implementation[0],
str(implementation[1][0]) + "." +
str(implementation[1][1]) + "." +
str(implementation[1][2]))
print(uname()[3])
print("run on", uname()[4])
print("====================================================")
i2c0 = I2C(0)
print(i2c0)
print("Available i2c devices: "+ str(i2c0.scan()))
WIDTH = 128
HEIGHT = 64
oled = SSD1306_I2C(WIDTH, HEIGHT, i2c0)
oled.fill(0)
oled.text("RPi Pico", 0, 0)
oled.text("MicroPython", 0, 10)
oled.text("OLED(ssd1306)", 0, 20)
oled.text("uQR exercise", 0, 40)
oled.show()
sleep(5)
qr = QRCode()
qr.add_data("uQR example")
matrix = qr.get_matrix()
print("version:", qr.version)
print("len of matrix", len(matrix))
oled.fill(1)
for y in range(len(matrix)*2): # Scaling the bitmap by 2
for x in range(len(matrix[0])*2): # because my screen is tiny.
value = not matrix[int(y/2)][int(x/2)] # Inverting the values because
oled.pixel(x, y, value) # black is `True` in the matrix.
oled.show()
while True:
userinput = input("\nEnter something: ")
if userinput == "":
break
print(userinput)
qr.clear()
qr.add_data(userinput)
matrix = qr.get_matrix()
print("version:", qr.version)
print("len of matrix", len(matrix))
oled.fill(1)
scale = 1
for y in range(len(matrix)*scale):
for x in range(len(matrix[0])*scale):
value = not matrix[int(y/scale)][int(x/scale)]
oled.pixel(x, y, value)
oled.show()
print("~ bye ~")
mpyPico_simpletest_uQR.py, generate QR Code and display on REPL.
"""
Run on Raspbery Pi Pico/MicroPython
to generate QR code using uQR,
and display on screen
- Libs needed:
JASchilz/uQR:
https://github.com/JASchilz/uQR
"""
from uos import uname
from usys import implementation
from usys import stdout
from uQR import QRCode
print("====================================================")
print(implementation[0],
str(implementation[1][0]) + "." +
str(implementation[1][1]) + "." +
str(implementation[1][2]))
print(uname()[3])
print("run on", uname()[4])
print("====================================================")
# For drawing filled rectangles to the console:
stdout = stdout
WHITE = "\x1b[1;47m \x1b[40m"
BLACK = " "
NORMAL = '\033[1;37;0m'
def print_QR(uqr):
qr_matrix = uqr.get_matrix()
print("version:", uqr.version)
qr_height = len(qr_matrix)
qr_width = len(qr_matrix[0])
print("qr_height: ", qr_height)
print("qr_width: ", qr_width)
for _ in range(4):
for _ in range(qr_width + 8): #margin on top
stdout.write(WHITE)
print()
for y in range(qr_height):
stdout.write(WHITE * 4) #margin on right
for x in range(len(matrix[0])):
value = qr_matrix[int(y)][int(x)]
if value == True:
stdout.write(BLACK)
else:
stdout.write(WHITE)
stdout.write(WHITE * 4) #margin on left
print()
for _ in range(4):
for _ in range(qr_width + 8): #margin on bottom
stdout.write(WHITE)
print()
print(NORMAL)
qr = QRCode()
qr.add_data("uQR example")
matrix = qr.get_matrix()
print_QR(qr)
while True:
userinput = input("\nEnter something: ")
if userinput == "":
break
print(userinput)
qr.clear()
qr.add_data(userinput)
matrix = qr.get_matrix()
print_QR(qr)
print("~ bye ~")
