树莓派使用 Nokia 5110 屏幕显示网速温度

Nokia 5110
长上图这样。

驱动
PCD8544

资料
Google 一搜各种博客都有介绍，毕竟我不是学硬件的，底层什么的就不说了。好玩就行。

引脚

rst:外部复位引脚
ce：显示屏使能引脚
dc：数据/命令引脚
din：串行数据输入端
clk：串行时钟输入端
vcc：电源引脚
bl：亮度调节
gnd：接地

先看看驱动代码

修改自(Adafruit)，这里用的是 BCM 编码。

# coding:utf-8
import time
import Adafruit_GPIO as GPIO
import Adafruit_GPIO.SPI as SPI

LCDWIDTH = 84
LCDHEIGHT = 48
ROWPIXELS = LCDHEIGHT//6
PCD8544_POWERDOWN = 0x04
PCD8544_ENTRYMODE = 0x02
PCD8544_EXTENDEDINSTRUCTION = 0x01
PCD8544_DISPLAYBLANK = 0x0
PCD8544_DISPLAYNORMAL = 0x4
PCD8544_DISPLAYALLON = 0x1
PCD8544_DISPLAYINVERTED = 0x5
PCD8544_FUNCTIONSET = 0x20
PCD8544_DISPLAYCONTROL = 0x08
PCD8544_SETYADDR = 0x40
PCD8544_SETXADDR = 0x80
PCD8544_SETTEMP = 0x04
PCD8544_SETBIAS = 0x10
PCD8544_SETVOP = 0x80
FONT = {
  ' ': [0x00, 0x00, 0x00, 0x00, 0x00],
  '!': [0x00, 0x00, 0x5f, 0x00, 0x00],
  '"': [0x00, 0x07, 0x00, 0x07, 0x00],
  '#': [0x14, 0x7f, 0x14, 0x7f, 0x14],
  '$': [0x24, 0x2a, 0x7f, 0x2a, 0x12],
  '%': [0x23, 0x13, 0x08, 0x64, 0x62],
  '&': [0x36, 0x49, 0x55, 0x22, 0x50],
  "'": [0x00, 0x05, 0x03, 0x00, 0x00],
  '(': [0x00, 0x1c, 0x22, 0x41, 0x00],
  ')': [0x00, 0x41, 0x22, 0x1c, 0x00],
  '*': [0x14, 0x08, 0x3e, 0x08, 0x14],
  '+': [0x08, 0x08, 0x3e, 0x08, 0x08],
  ',': [0x00, 0x50, 0x30, 0x00, 0x00],
  '-': [0x08, 0x08, 0x08, 0x08, 0x08],
  '.': [0x00, 0x60, 0x60, 0x00, 0x00],
  '/': [0x20, 0x10, 0x08, 0x04, 0x02],
  '0': [0x3e, 0x51, 0x49, 0x45, 0x3e],
  '1': [0x00, 0x42, 0x7f, 0x40, 0x00],
  '2': [0x42, 0x61, 0x51, 0x49, 0x46],
  '3': [0x21, 0x41, 0x45, 0x4b, 0x31],
  '4': [0x18, 0x14, 0x12, 0x7f, 0x10],
  '5': [0x27, 0x45, 0x45, 0x45, 0x39],
  '6': [0x3c, 0x4a, 0x49, 0x49, 0x30],
  '7': [0x01, 0x71, 0x09, 0x05, 0x03],
  '8': [0x36, 0x49, 0x49, 0x49, 0x36],
  '9': [0x06, 0x49, 0x49, 0x29, 0x1e],
  ':': [0x00, 0x36, 0x36, 0x00, 0x00],
  ';': [0x00, 0x56, 0x36, 0x00, 0x00],
  '<': [0x08, 0x14, 0x22, 0x41, 0x00], '=': [0x14, 0x14, 0x14, 0x14, 0x14], '>': [0x00, 0x41, 0x22, 0x14, 0x08],
  '?': [0x02, 0x01, 0x51, 0x09, 0x06],
  '@': [0x32, 0x49, 0x79, 0x41, 0x3e],
  'A': [0x7e, 0x11, 0x11, 0x11, 0x7e],
  'B': [0x7f, 0x49, 0x49, 0x49, 0x36],
  'C': [0x3e, 0x41, 0x41, 0x41, 0x22],
  'D': [0x7f, 0x41, 0x41, 0x22, 0x1c],
  'E': [0x7f, 0x49, 0x49, 0x49, 0x41],
  'F': [0x7f, 0x09, 0x09, 0x09, 0x01],
  'G': [0x3e, 0x41, 0x49, 0x49, 0x7a],
  'H': [0x7f, 0x08, 0x08, 0x08, 0x7f],
  'I': [0x00, 0x41, 0x7f, 0x41, 0x00],
  'J': [0x20, 0x40, 0x41, 0x3f, 0x01],
  'K': [0x7f, 0x08, 0x14, 0x22, 0x41],
  'L': [0x7f, 0x40, 0x40, 0x40, 0x40],
  'M': [0x7f, 0x02, 0x0c, 0x02, 0x7f],
  'N': [0x7f, 0x04, 0x08, 0x10, 0x7f],
  'O': [0x3e, 0x41, 0x41, 0x41, 0x3e],
  'P': [0x7f, 0x09, 0x09, 0x09, 0x06],
  'Q': [0x3e, 0x41, 0x51, 0x21, 0x5e],
  'R': [0x7f, 0x09, 0x19, 0x29, 0x46],
  'S': [0x46, 0x49, 0x49, 0x49, 0x31],
  'T': [0x01, 0x01, 0x7f, 0x01, 0x01],
  'U': [0x3f, 0x40, 0x40, 0x40, 0x3f],
  'V': [0x1f, 0x20, 0x40, 0x20, 0x1f],
  'W': [0x3f, 0x40, 0x38, 0x40, 0x3f],
  'X': [0x63, 0x14, 0x08, 0x14, 0x63],
  'Y': [0x07, 0x08, 0x70, 0x08, 0x07],
  'Z': [0x61, 0x51, 0x49, 0x45, 0x43],
  '[': [0x00, 0x7f, 0x41, 0x41, 0x00],
  '\\': [0x02, 0x04, 0x08, 0x10, 0x20],
  ']': [0x00, 0x41, 0x41, 0x7f, 0x00],
  '^': [0x04, 0x02, 0x01, 0x02, 0x04],
  '_': [0x40, 0x40, 0x40, 0x40, 0x40],
  '`': [0x00, 0x01, 0x02, 0x04, 0x00],
  'a': [0x20, 0x54, 0x54, 0x54, 0x78],
  'b': [0x7f, 0x48, 0x44, 0x44, 0x38],
  'c': [0x38, 0x44, 0x44, 0x44, 0x20],
  'd': [0x38, 0x44, 0x44, 0x48, 0x7f],
  'e': [0x38, 0x54, 0x54, 0x54, 0x18],
  'f': [0x08, 0x7e, 0x09, 0x01, 0x02],
  'g': [0x0c, 0x52, 0x52, 0x52, 0x3e],
  'h': [0x7f, 0x08, 0x04, 0x04, 0x78],
  'i': [0x00, 0x44, 0x7d, 0x40, 0x00],
  'j': [0x20, 0x40, 0x44, 0x3d, 0x00],
  'k': [0x7f, 0x10, 0x28, 0x44, 0x00],
  'l': [0x00, 0x41, 0x7f, 0x40, 0x00],
  'm': [0x7c, 0x04, 0x18, 0x04, 0x78],
  'n': [0x7c, 0x08, 0x04, 0x04, 0x78],
  'o': [0x38, 0x44, 0x44, 0x44, 0x38],
  'p': [0x7c, 0x14, 0x14, 0x14, 0x08],
  'q': [0x08, 0x14, 0x14, 0x18, 0x7c],
  'r': [0x7c, 0x08, 0x04, 0x04, 0x08],
  's': [0x48, 0x54, 0x54, 0x54, 0x20],
  't': [0x04, 0x3f, 0x44, 0x40, 0x20],
  'u': [0x3c, 0x40, 0x40, 0x20, 0x7c],
  'v': [0x1c, 0x20, 0x40, 0x20, 0x1c],
  'w': [0x3c, 0x40, 0x30, 0x40, 0x3c],
  'x': [0x44, 0x28, 0x10, 0x28, 0x44],
  'y': [0x0c, 0x50, 0x50, 0x50, 0x3c],
  'z': [0x44, 0x64, 0x54, 0x4c, 0x44],
  '{': [0x00, 0x08, 0x36, 0x41, 0x00],
  '|': [0x00, 0x00, 0x7f, 0x00, 0x00],
  '}': [0x00, 0x41, 0x36, 0x08, 0x00],
  '~': [0x10, 0x08, 0x08, 0x10, 0x08],
  '\x7f': [0x00, 0x7e, 0x42, 0x42, 0x7e],
}
X = 13
Y = 5

class PCD8544(object):
    """Nokia 5110/3310 PCD8544-based LCD display."""

    def __init__(self, dc, rst, sclk=None, din=None, cs=None, gpio=None, spi=None, vcc=None, bl=None):
        self._sclk = sclk
        self._din = din
        self._dc = dc
        self._cs = cs
        self._rst = rst
        self._gpio = gpio
        self._spi = spi
        self._buffer = [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, 0xC0, 0xE0, 0xF0, 0xF8, 0xFC, 0xFC, 0xFE, 0xFF, 0xFC, 0xE0, 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, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF0, 0xF0, 0xE0, 0xE0, 0xC0, 0x80, 0xC0, 0xFC, 0xFF, 0xFF, 0xFF, 0xFF, 0x7F, 0x3F, 0x7F, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 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, 0x0F, 0x1F, 0x3F, 0x7F, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xE7, 0xC7, 0xC7, 0x87, 0x8F, 0x9F, 0x9F, 0xFF, 0xFF, 0xFF, 0xC1, 0xC0, 0xE0, 0xFC, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFC, 0xFC, 0xFC, 0xFC, 0xFE, 0xFE, 0xFE, 0xFC, 0xFC, 0xF8, 0xF8, 0xF0, 0xE0, 0xC0, 0xC0, 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, 0x80, 0xC0, 0xE0, 0xF1, 0xFB, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0x7F, 0x1F, 0x0F, 0x0F, 0x87, 0xE7, 0xFF, 0xFF, 0xFF, 0x1F, 0x1F, 0x3F, 0xF9, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xFD, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0x7F, 0x3F, 0x0F, 0x07, 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, 0xF0, 0xFE, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFE, 0x7E, 0x3F, 0x3F, 0x0F, 0x1F, 0xFF, 0xFF, 0xFF, 0xFC, 0xF0, 0xE0, 0xF1, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFC, 0xF0, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 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, 0x03, 0x03, 0x03, 0x03, 0x03, 0x03, 0x03, 0x03, 0x01, 0x01, 0x01, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x03, 0x0F, 0x1F, 0x3F, 0x7F, 0x7F, 0xFF, 0xFF, 0xFF, 0xFF, 0x7F, 0x7F, 0x1F, 0x03, 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 ]
        if self._gpio is None:
            self._gpio = GPIO.get_platform_gpio()
            self._gpio.setup(vcc, GPIO.OUT)
            self._gpio.setup(bl, GPIO.OUT)
            self._gpio.output(vcc, 1)
            self._gpio.output(bl, 1)
        if self._rst is not None:
            self._gpio.setup(self._rst, GPIO.OUT)
        # Default to bit bang SPI.
        if self._spi is None:
            self._spi = SPI.BitBang(self._gpio, self._sclk, self._din, None, self._cs)
        # Set pin outputs.
        self._gpio.setup(self._dc, GPIO.OUT)
        # Initialize buffer to Adafruit logo.

    def command(self, c):
        """Send command byte to display."""
        # DC pin low signals command byte.
        self._gpio.set_low(self._dc)
        self._spi.write()

    def extended_command(self, c):
        """Send a command in extended mode"""
        # Set extended command mode
        self.command(PCD8544_FUNCTIONSET | PCD8544_EXTENDEDINSTRUCTION)
        self.command(c)
        # Set normal display mode.
        self.command(PCD8544_FUNCTIONSET)
        self.command(PCD8544_DISPLAYCONTROL | PCD8544_DISPLAYNORMAL)

    def begin(self, contrast=40, bias=4):
        """Initialize display."""
        self.reset()
        # Set LCD bias.
        self.set_bias(bias)
        self.set_contrast(contrast)

    def reset(self):
        """Reset the display"""
        if self._rst is not None:
            # Toggle RST low to reset.
            self._gpio.set_low(self._rst)
            time.sleep(0.1)
            self._gpio.set_high(self._rst)

    def display(self):
        """Write display buffer to physical display."""
        # TODO: Consider support for partial updates like Arduino library.
        # Reset to position zero.
        self.command(PCD8544_SETYADDR)
        self.command(PCD8544_SETXADDR)
        # Write the buffer.
        self._gpio.set_high(self._dc)
        self._spi.write(self._buffer)

    def clear(self):
        """Clear contents of image buffer."""
        self._buffer = [0] * (LCDWIDTH * LCDHEIGHT // 8)

    def set_contrast(self, contrast):
        """Set contrast to specified value (should be 0-127)."""
        contrast = max(0, min(contrast, 0x7f)) # Clamp to values 0-0x7f
        self.extended_command(PCD8544_SETVOP | contrast)

    def set_bias(self, bias):
        """Set bias"""
        self.extended_command(PCD8544_SETBIAS | bias)

    def draw_str(self, y, s):
        """修改显示数据，y 为第几行，s 为要显示的数据"""
        if (y >= Y ) or (y < 0):
            return False
        x = 0
        for c in s[0:14]:
            try:
                self._buffer[y*84+x*6: y*84+x*6 + 6] = FONT + [0]
            except KeyError:
                pass
            x += 1

    def draw_char(self, x, y):
        pass

    def quit(self):
        self._gpio.cleanup()

接线(BCM)

dc 13
rst 5
sclk 26
din 19
cs 6
vcc 20
bl 21
gnd 0v

显示信息

网速
显示路由器的网速，电脑网速就没必要了。
我用的是老毛子固件，所以用这个固件的可以参考我的代码。

代码量不大，我就没写注释了。

# coding:utf-8
import requests
import time
from math import fabs
from base64 import b64encode
# from demjson import decode

class RaspberryMonitorNetSpeed:
    url = 'http://192.168.123.1/update.cgi?output=netdev'
    headers = {
            'Accept': 'text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,image/apng,*/*;q=0.8',
            'Accept-Encoding': 'gzip, deflate',
            'Accept-Language': 'zh-CN,zh;q=0.9,en;q=0.8',
            'Cache-Control': 'max-age=0',
            # 'Connection':'keep-alive',
            'Connection': 'close',
            'Cookie': 'n56u_cookie_bw_rt_tab=WAN',
            'Host': '192.168.123.1',
            'Upgrade-Insecure-Requests': '1',
            'User-Agent': 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/64.0.3282.186 Safari/537.36',
        }
    # 最近一次请求时间
    last_time = 0
    # 最近一次请求的下行数据总量
    last_rbytes = 0
    # 最近一次请求的上行数据总量
    last_tbytes = 0

    def __init__(self, username, passwd):
        self.headers['Authorization'] = 'Basic '+b64encode((username+':'+passwd).encode()).decode()
        data = self.__get_wan_rx_and_tx()
        self.last_rbytes = data[0]
        self.last_tbytes = data[1]
        self.last_time = data[2]

    def set_auth(self, username, passwd):
        self.headers['Authorization'] = 'Basic '+b64encode((username+':'+passwd).encode()).decode()

    def __get_wan_rx_and_tx(self):
        text = requests.get(self.url, headers=self.headers).text
        try:
            rx = int(text.split(',')[25].lstrip('rx:').strip(), 16)
            tx = int(text.split(',')[26].lstrip('tx:').rstrip('}\n').strip(), 16)
            new_time = time.time()
        except (IndexError, ValueError, TypeError):
            return False
        return [rx, tx, new_time]

    def get_human_speed(self):
        """这里返回的是 M/s 这种网速，[下载，上传]"""
        data = self.__get_wan_rx_and_tx()
        if data:
            down_speed = 0
            up_speed = 0
            try:
                down_speed = self.__bytes_to_humanspeed((data[0] - self.last_rbytes) / (data[2] - self.last_time))
                up_speed = self.__bytes_to_humanspeed((data[1] - self.last_tbytes) / (data[2] - self.last_time))
            except ZeroDivisionError:
                pass
            self.last_rbytes = data[0]
            self.last_tbytes = data[1]
            self.last_time = data[2]
            return down_speed, up_speed

    def __bytes_to_humanspeed(self, B):
        absval = fabs(B) / 1024
        megabyte = 1024
        gigabyte = megabyte * 1024
        terabyte = gigabyte * 1024
        # petabyte = terabyte * 1024
        if absval < megabyte:
            return str(round(absval, 2)) + ' KB/s'
        elif absval < gigabyte:
            return str(round(absval / megabyte, 2)) + ' M/s'
        else:
            return str(round(absval / gigabyte, 2)) + ' G/s'

    def get_bits_speed(self):
        """这里返回的是 Mbps 这种网速，[下载，上传]"""
        data = self.__get_wan_rx_and_tx()
        if data:
            down_speed = self.__bytes_to_bitrate((data[0] - self.last_rbytes) / (data[2] - self.last_time))
            up_speed = self.__bytes_to_bitrate((data[1] - self.last_tbytes) / (data[2] - self.last_time))
            self.last_rbytes = data[0]
            self.last_tbytes = data[1]
            self.last_time = data[2]
            return down_speed, up_speed

    def __bytes_to_bitrate(self, B):
        bits = B * 8
        absval = fabs(bits)
        kilobit = 1000
        megabit = kilobit * 1000
        gigabit = megabit * 1000
        if absval < megabit:
            return str(round(bits / kilobit, 2)) + ' Kbps'
        elif absval < gigabit:
            return str(round(bits / megabit, 2)) + ' Mbps'
        else:
            return str(round(bits / gigabit, 2)) + ' Gbps'

if __name__ == '__main__':
    from lcd1602 import LCD1602
    a = RaspberryMonitorNetSpeed('username', 'password')
    lcd = LCD1602()
    while True:
        tmp = a.get_human_speed()
        lcd.lcd_string('u:' + tmp[1], lcd.LCD_LINE_1)
        lcd.lcd_string('d:' + tmp[0], lcd.LCD_LINE_2)
        time.sleep(2)

温度
这里用的是 DTH11，驱动同样参考这个(Adafruit)。

开始显示
代码量同样不大，没写注释。

import time
import datetime
from PCD8544 import PCD8544 as lcd
import threading
import Adafruit_DHT
from speed import RaspberryMonitorNetSpeed as rmn

ns = [-1, -1]
th = [-2, -2]

def main():
    a = lcd(dc=13, rst=5, sclk=26, din=19, cs=6, vcc=20, bl=21)
    a.begin(contrast=60)
    tmp = threading.Thread(target=network_speed)
    tmp.setDaemon(True)
    tmp.start()
    tmp = threading.Thread(target=temperature_humidity)
    tmp.setDaemon(True)
    tmp.start()
    while True:
        try:
            a.clear()
            # 上传速度
            a.draw_str(0, 'U: ' + str(ns[1]))
            # 下载速度
            a.draw_str(1, 'D: ' + str(ns[0]))
            # 温度
            a.draw_str(2, 'T: ' + str(th[1]) + ' C')
            # 湿度
            a.draw_str(3, 'H: ' + str(th[0]) + '%')
            # 时间
            a.draw_str(4, datetime.datetime.now().__str__()[5:].lstrip('0').split('.')[0])
            a.display()
            time.sleep(1)
        except KeyboardInterrupt:
            a.quit()
            exit(0)

def network_speed():
    global ns
    b = rmn('bankroft', '123456')
    while True:
        time.sleep(1)
        ns = b.get_human_speed()

def temperature_humidity():
    global th
    pin = 25
    while True:
        time.sleep(10)
        th = Adafruit_DHT.read_retry(11, 25)

if __name__ == '__main__':
    main()

运行

依赖
python3

安装 Python 库
Adafruit_GPIO
Adafruit_DHT
requests

运行

python main.py

成果

作者：简书 Bankroft

这是一篇发布于 6年前的文章，其中的信息可能已经有所发展或是发生改变，请了解。

4,487

树莓派使用 Nokia 5110 屏幕显示网速温度

引脚

先看看驱动代码

接线(BCM)

显示信息

运行

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引脚

先看看驱动代码

接线(BCM)

显示信息

运行

2 评论

发表评论 取消回复

发表评论取消回复