Qiitaさんの書き方なんも覚えてないけどとりあえずメモ
Raspberry Pi Pico Wを買ったので、スマホから入力した文字を電子ペーパーにQRコードを表示させてみた。
使ったのはこの電子ペーパー
参考にしたのは以下
無線LANに接続してブラウザでアクセスまで作ってくれてる神
uQRというライブラリを使ってQRコードをOLEディスプレイに表示してる人
電子ペーパー表示のサンプル
ファイルは
main.py
pWifi.py
ePaperQr,py
uQR.py
で動いてる
無線LANな部分をメインに改造
pWifi.py
import time
import network
import socket
import ePaperQr
import rp2
from machine import Pin
import machine
led = Pin("LED", machine.Pin.OUT)
ledState = 'LED State Unknown'
pIpStr = "255.255.255.255"
s = socket.socket()
def pConnect():
led.value(1)
time.sleep(1)
led.value(0)
time.sleep(1)
led.value(1)
time.sleep(1)
led.value(0)
time.sleep(1)
#自宅Wi-FiのSSIDとパスワードを入力
if rp2.bootsel_button() == 1:
print("ie")
ssid = '自宅SSID'
password = '自宅パスワード'
else:
print("sumaho")
ssid = 'スマホSSID'
password = 'スマホパスワード'
led.value(1)
time.sleep(1)
pIpStr="err"
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
print("koko1")
led.value(0)
if wlan.status() != 3:
raise RuntimeError('network connection failed')
else:
print('Connected')
status = wlan.ifconfig()
pIpStr=str(status[0])
print( 'get_ip = ' + pIpStr )
#if (pIpStr=="123"):
ePaperQr.draw_init()
print(f"test = http://{pIpStr}")
ePaperQr.draw_qr(f"http://{pIpStr}", 20, 19)
ePaperQr.draw_text(f"{pIpStr}", 0, 0)
ePaperQr.draw_finish()
try:
# Open socket
addr = socket.getaddrinfo('0.0.0.0', 80)[0][-1]
#s = socket.socket()
s.bind(addr)
s.listen(1)
led.value(1)
print('listening on', addr)
print(f"s={str(s)}")
except:
print("er-----------")
print(f"s={str(s)}")
return pIpStr
def pStart():
html = """<!DOCTYPE html><html>
<head><meta name="viewport" content="width=device-width, initial-scale=1">
<link rel="icon" href="data:,">
<style>html { font-family: Helvetica; display: inline-block; margin: 0px auto; text-align: center;}
.buttonGreen { background-color: #4CAF50; border: 2px solid #000000;; color: white; padding: 15px 32px; text-align: center; text-decoration: none; display: inline-block; font-size: 16px; margin: 4px 2px; cursor: pointer; }
.buttonRed { background-color: #D11D53; border: 2px solid #000000;; color: white; padding: 15px 32px; text-align: center; text-decoration: none; display: inline-block; font-size: 16px; margin: 4px 2px; cursor: pointer; }
text-decoration: none; font-size: 30px; margin: 2px; cursor: pointer;}
</style></head>
<body><center><h1>Raspberry Pi Pico W</h1></center><br><br>
<form><center>
<input type="text" name="ppIpStr"><br>
<input type="submit" value="set">
</center></form>
<br><br>
<br><br>
<p>%s<p></body></html>
"""
# Listen for connections, serve client
while True:
#try:
print(str(s))
cl, addr = s.accept()
print('client connected from', addr)
request = cl.recv(1024)
print("request:")
print(request)
request = str(request)
TempStr = request[request.find('ppIpStr='):request.find('ppIpStr=')+100]
WifiQrStr = TempStr[8:TempStr.find(' ')]
WifiQrStr = WifiQrStr.replace("%3A",":").replace("%2F","/")
# Create and send response
#stateis = ledState
stateis = "<br>QR: " + WifiQrStr
response = html % stateis
cl.send('HTTP/1.0 200 OK\r\nContent-type: text/html\r\n\r\n')
cl.send(response)
cl.close()
print("WifiQrStr:" + str(WifiQrStr))
if (str(WifiQrStr)==""):
print("WifiQrStr:" + "space")
else:
ePaperQr.draw_init()
ePaperQr.draw_qr(f"{WifiQrStr}", 20, 49)
ePaperQr.draw_text(f"QR:{WifiQrStr}", 0, 0)
ePaperQr.draw_finish()
if __name__=='__main__':
print('test')
電子ペーパーのサンプルをQRコード表示するよう改造
ePaperQr.py
from machine import Pin, SPI
from time import sleep
import time
import framebuf
import utime
import math
from uQR import QRCode
qr = QRCode()
# Display resolution
EPD_WIDTH = 152
EPD_HEIGHT = 296
RST_PIN = 12
DC_PIN = 8
CS_PIN = 9
BUSY_PIN = 13
WF_PARTIAL_2IN66 =[
0x00,0x40,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x80,0x80,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x40,0x40,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x80,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x0A,0x00,0x00,0x00,0x00,0x00,0x02,0x01,0x00,0x00,
0x00,0x00,0x00,0x00,0x01,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x22,0x22,0x22,0x22,0x22,0x22,
0x00,0x00,0x00,0x22,0x17,0x41,0xB0,0x32,0x36,
]
bit2 =[
0,0,0,0,0,0,0,0
]
class EPD_2in9_B:
def __init__(self):
self.reset_pin = Pin(RST_PIN, Pin.OUT)
self.busy_pin = Pin(BUSY_PIN, Pin.IN, Pin.PULL_UP)
self.cs_pin = Pin(CS_PIN, Pin.OUT)
self.width = EPD_WIDTH
self.height = EPD_HEIGHT
self.lut = WF_PARTIAL_2IN66
self.spi = SPI(1)
self.spi.init(baudrate=4000_000)
self.dc_pin = Pin(DC_PIN, Pin.OUT)
self.buffer_balck = bytearray(self.height * self.width // 8)
self.buffer_red = bytearray(self.height * self.width // 8)
self.imageblack = framebuf.FrameBuffer(self.buffer_balck, self.width, self.height, framebuf.MONO_HLSB)
self.imagered = framebuf.FrameBuffer(self.buffer_red, self.width, self.height, framebuf.MONO_HLSB)
self.init()
def digital_write(self, pin, value):
pin.value(value)
def digital_read(self, pin):
return pin.value()
def delay_ms(self, delaytime):
utime.sleep(delaytime / 1000.0)
def spi_writebyte(self, data):
self.spi.write(bytearray(data))
def module_exit(self):
self.digital_write(self.reset_pin, 0)
# Hardware reset
def reset(self):
self.digital_write(self.reset_pin, 1)
self.delay_ms(50)
self.digital_write(self.reset_pin, 0)
self.delay_ms(2)
self.digital_write(self.reset_pin, 1)
self.delay_ms(50)
def send_command(self, command):
self.digital_write(self.dc_pin, 0)
self.digital_write(self.cs_pin, 0)
self.spi_writebyte([command])
self.digital_write(self.cs_pin, 1)
def send_data(self, data):
self.digital_write(self.dc_pin, 1)
self.digital_write(self.cs_pin, 0)
self.spi_writebyte([data])
self.digital_write(self.cs_pin, 1)
def SetWindow(self, x_start, y_start, x_end, y_end):
self.send_command(0x44)
self.send_data((x_start>>3) & 0x1f)
self.send_data((x_end>>3) & 0x1f)
self.send_command(0x45)
self.send_data(y_start&0xff)
self.send_data((y_start&0x100)>>8)
self.send_data((y_end&0xff))
self.send_data((y_end&0x100)>>8)
def SetCursor(self, x_start, y_start):
self.send_command(0x4E)
self.send_data(x_start & 0x1f)
self.send_command(0x4f)
self.send_data(y_start&0xff)
self.send_data((y_start&0x100)>>8)
def ReadBusy(self):
#print('e-Paper busy')
utime.sleep_ms(50)
while(self.busy_pin.value() == 1): # 0: idle, 1: busy
utime.sleep_ms(10)
#print('e-Paper busy release')
utime.sleep_ms(50)
def TurnOnDisplay(self):
self.send_command(0x20)
self.ReadBusy()
def init(self):
print('init')
self.reset()
self.ReadBusy()
self.send_command(0x12)
self.ReadBusy()#waiting for the electronic paper IC to release the idle signal
self.send_command(0x11)
self.send_data(0x03)
self.SetWindow(0, 0, self.width-1, self.height-1)
self.send_command(0x21) #resolution setting
self.send_data (0x00)
self.send_data (0x80)
self.SetCursor(0,0)
self.ReadBusy()
def display(self):
high = self.height
if( self.width % 8 == 0) :
wide = self.width // 8
else :
wide = self.width // 8 + 1
self.send_command(0x24)
for j in range(0, high):
for i in range(0, wide):
self.send_data(self.buffer_balck[i + j * wide])
self.send_command(0x26)
for j in range(0, high):
for i in range(0, wide):
self.send_data(~self.buffer_red[i + j * wide])
self.TurnOnDisplay()
def Clear(self, colorblack, colorred):
high = self.height
if( self.width % 8 == 0) :
wide = self.width // 8
else :
wide = self.width // 8 + 1
self.send_command(0x24)
for j in range(0, high):
for i in range(0, wide):
self.send_data(colorblack)
self.send_command(0x26)
for j in range(0, high):
for i in range(0, wide):
self.send_data(~colorred)
self.TurnOnDisplay()
def sleep(self):
self.send_command(0X10) # deep sleep
self.send_data(0x01)
def dec2bit(ddd):
for VV in range(8, 0, -1):
bit2[VV-1] = ddd % 2
ddd = math.floor(ddd / 2)
return bit2
def draw_init():
epd.init()
epd.imageblack.fill(0xff)
epd.imagered.fill(0xff)
print("datafile input")
epd.imageblack.text(str(EPD_WIDTH) + "x" + str(EPD_HEIGHT), 0, EPD_HEIGHT-11, 0x00)
def draw_finish():
print("display")
epd.display()
epd.delay_ms(2000)
print("sleep")
epd.sleep()
print("end")
def draw_qr(qr_data, offset_x, offset_y):
print("drow_qr " + str(qr_data))
scale = 1
qr.clear()
qr.add_data(qr_data)
matrix = qr.get_matrix()
print("QR version:", qr.version)
print("Matrix length", len(matrix))
print("X:", len(matrix)*scale)
print("X:", len(matrix[0])*scale)
for y in range(len(matrix)*scale):
for x in range(len(matrix[0])*scale):
value = not matrix[int(y/scale)][int(x/scale)]
if (value):
epd.imageblack.fill_rect(x + offset_x, y + offset_y, 1, 1, 0xFF)
else:
epd.imageblack.fill_rect(x + offset_x, y + offset_y, 1, 1, 0x00)
def draw_text(qr_data, offset_x, offset_y):
print("drow_text " + str(qr_data))
epd.imageblack.text(str(qr_data), offset_x, offset_y, 0x00)
epd = EPD_2in9_B()
if __name__=='__main__':
print("OS START")
uQR.pyは長いので省略。
数字だけ30文字ぐらい入れたらエラーになったのでその対策したんだけど、そのままでも動くよ。
電源入れると動くやつ
main.py
import pWifi
IpStr = "255.255.255.255"
try:
IpStr = pWifi.pConnect()
IpStr = pWifi.pStart()
except:
print("er-----------")
使い方は以下
１．pWifi.pyのSSIDとパスワードを使っている無線LANのものに変更する
(自宅の無線LANだけじゃなくテザリングしてるスマホでも動いたよ)
２．PiPicoWの電源入れたら勝手に無線LAN(スマホ用)に繋ぎに行くので成功したらQRコードが以下に更新される
http://PiPicoのIPアドレス
(電源いれて最初にLEDが光ってから4秒後にBOOTSELボタン押してると違う無線LAN(家用)に繋ぎにいく)
３．表示されたQRコードからPiPicoWにブラウザでアクセス(http://PiPicoのIPアドレス)
４．テキストボックスにテキストを入力してsetボタンを押すと電子ペーパーのQRコードが変化する
５．電源抜く
６．電子ペーパーなのでQR表示させたまま持ち運び可能
自分用メモなのでここまで