基于MicroPython的ESP32在OLED上实时刷新温湿度

基于MicroPython的ESP32用起来后，做些小扩展功能：
1、通过DHT11获取温湿度；
2、将获取的温湿度显示在OLED上；并通过定时器，定时刷新；
3、OLED可显示中文；

一、DHT11获取温湿度

这个比较简单，直接上代码

# DHT11/DHT22 driver for MicroPython on ESP8266
# MIT license; Copyright (c) 2016 Damien P. George

import sys
import machine
from esp import dht_readinto

class DHTBase:
    def __init__(self, pin):
        self.pin = pin
        self.buf = bytearray(5)

    def measure(self):
        buf = self.buf
        dht_readinto(self.pin, buf)
        if (buf[0] + buf[1] + buf[2] + buf[3]) & 0xFF != buf[4]:
            raise Exception("checksum error")


class DHT11(DHTBase):
    def humidity(self):
        return self.buf[0]+self.buf[1]*0.1

    def temperature(self):
        return self.buf[2]+self.buf[3]*0.1

唯一要注意的就是温湿度的计算，网上很多五花八门的错误计算。第一个字节为湿度整数，第二个字节为湿度的小数。所以湿度值等于第一个字节加上第二个字节*0.1。温度一样的计算方法。

二、OLED显示

这个是根据TPYBoard例程ssd1306.py修改的，其链接可以看下，很多基于TPYBoard的例程。

原代码中有5x8字符显示，中文显示。将原代码通讯接口改为ESP32的IIC，增加8x16的字符显示。代码如下：

# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in
# all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
# THE SOFTWARE.

from machine import Pin,I2C
import font

# Constants
DISPLAYOFF          = 0xAE
SETCONTRAST         = 0x81
DISPLAYALLON_RESUME = 0xA4
DISPLAYALLON        = 0xA5
NORMALDISPLAY       = 0xA6
INVERTDISPLAY       = 0xA7
DISPLAYON           = 0xAF
SETDISPLAYOFFSET    = 0xD3
SETCOMPINS          = 0xDA
SETVCOMDETECT       = 0xDB
SETDISPLAYCLOCKDIV  = 0xD5
SETPRECHARGE        = 0xD9
SETMULTIPLEX        = 0xA8
SETLOWCOLUMN        = 0x00
SETHIGHCOLUMN       = 0x10
SETSTARTLINE        = 0x40
MEMORYMODE          = 0x20
COLUMNADDR          = 0x21
PAGEADDR            = 0x22
COMSCANINC          = 0xC0
COMSCANDEC          = 0xC8
SEGREMAP            = 0xA0
CHARGEPUMP          = 0x8D
EXTERNALVCC         = 0x10
SWITCHCAPVCC        = 0x20
SETPAGEADDR         = 0xB0
SETCOLADDR_LOW      = 0x00
SETCOLADDR_HIGH     = 0x10
ACTIVATE_SCROLL                      = 0x2F
DEACTIVATE_SCROLL                    = 0x2E
SET_VERTICAL_SCROLL_AREA             = 0xA3
RIGHT_HORIZONTAL_SCROLL              = 0x26
LEFT_HORIZONTAL_SCROLL               = 0x27
VERTICAL_AND_RIGHT_HORIZONTAL_SCROLL = 0x29
VERTICAL_AND_LEFT_HORIZONTAL_SCROLL  = 0x2A

# I2C devices are accessed through a Device ID. This is a 7-bit
# value but is sometimes expressed left-shifted by 1 as an 8-bit value.
# A pin on SSD1306 allows it to respond to ID 0x3C or 0x3D. The board
# I bought from ebay used a 0-ohm resistor to select between "0x78"
# (0x3c << 1) or "0x7a" (0x3d << 1). The default was set to "0x78"
DEVID = 0x3c

# I2C communication here is either <DEVID> <CTL_CMD> <command byte>
# or <DEVID> <CTL_DAT> <display buffer bytes> <> <> <> <>...
# These two values encode the Co (Continuation) bit as b7 and the
# D/C# (Data/Command Selection) bit as b6.
CTL_CMD = 0x80
CTL_DAT = 0x40

class SSD1306(object):

  def __init__(self, i2c_devid=DEVID):
    self.external_vcc = False
    self.height       = 64
    self.pages        = int(self.height / 8)
    self.columns      = 128

    
    self.i2c = I2C(scl=Pin(22), sda=Pin(21), freq=100000)
    self.devid = i2c_devid
    self.offset = 1
    # I2C command buffer
    self.cbuffer = bytearray(2)
    self.cbuffer[0] = CTL_CMD

  def clear(self):
    self.buffer = bytearray(self.offset + self.pages * self.columns)
    if self.offset == 1:
      self.buffer[0] = CTL_DAT

  def write_command(self, command_byte):
    self.cbuffer[1] = command_byte
    self.i2c.writeto(self.devid, self.cbuffer)
    
  def invert_display(self, invert):
    self.write_command(INVERTDISPLAY if invert else NORMALDISPLAY)

  def display(self):
    self.write_command(COLUMNADDR)
    self.write_command(0)
    self.write_command(self.columns - 1)
    self.write_command(PAGEADDR)
    self.write_command(0)
    self.write_command(self.pages - 1)
    self.i2c.writeto(self.devid, self.buffer)
    

  def set_pixel(self, x, y, state):
    index = x + (int(y / 8) * self.columns)
    if state:
      self.buffer[self.offset + index] |= (1 << (y & 7))
     
    else:
      self.buffer[self.offset + index] &= ~(1 << (y & 7))
      
  def draw_chinese(self,ch_str,x_axis,y_axis):
    offset_=0
    y_axis=y_axis*8#中文高度一行占8个
    x_axis=127-(x_axis*16)#中文宽度占16个
    for k in ch_str:
        code = 0x00#将中文转成16进制编码
        data_code = k.encode("utf-8")
        code |= data_code[0]<<16
        code |= data_code[1]<<8
        code |= data_code[2]
        byte_data=font.byte2[code]
        for y in range(0,16):
            a_=bin(byte_data[y]).replace('0b','')
            while len(a_)<8:
                a_='0'+a_
                
            b_=bin(byte_data[y+16]).replace('0b','')
            while len(b_)<8:
                b_='0'+b_
            for x in range(0,8):
                self.set_pixel(x_axis-x-offset_,y+y_axis,int(a_[x]))#文字的上半部分
                self.set_pixel(x_axis-x-8-offset_,y+y_axis,int(b_[x]))#文字的下半部分
        offset_+=16
 
  def draw_string(self,ch_str,x_axis,y_axis):
    offset_=0
    y_axis=y_axis*8#字符高度一行占8个
    x_axis=127-(x_axis*8)#字符宽度占8个
    for k in ch_str:
        code = 0x00
        code = ord(k)-0x20  
        byte_data=font.byte3[code]  #字符查表
        for y in range(0,16):
            a_=bin(byte_data[y]).replace('0b','')
            while len(a_)<8:
                a_='0'+a_
                
            for x in range(0,8):
                self.set_pixel(x_axis-x-offset_,y+y_axis,int(a_[x]))
        offset_+=8

  def init_display(self):
    chargepump = 0x10 if self.external_vcc else 0x14
    precharge  = 0x22 if self.external_vcc else 0xf1
    multiplex  = 0x1f if self.height == 32 else 0x3f
    compins    = 0x02 if self.height == 32 else 0x12
    contrast   = 0xff # 0x8f if self.height == 32 else (0x9f if self.external_vcc else 0x9f)
    data = [DISPLAYOFF,
            SETDISPLAYCLOCKDIV, 0x80,
            SETMULTIPLEX, multiplex,
            SETDISPLAYOFFSET, 0x00,
            SETSTARTLINE | 0x00,
            CHARGEPUMP, chargepump,
            MEMORYMODE, 0x00,
            SEGREMAP | 0x10,
            COMSCANDEC,
            SETCOMPINS, compins,
            SETCONTRAST, contrast,
            SETPRECHARGE, precharge,
            SETVCOMDETECT, 0x40,
            DISPLAYALLON_RESUME,
            NORMALDISPLAY,
            DISPLAYON]
    for item in data:
      self.write_command(item)
    self.clear()
    self.display()
  
  def poweroff(self):
    self.write_command(DISPLAYOFF)

  def contrast(self, contrast):
    self.write_command(SETCONTRAST)
    self.write_command(contrast)

  def draw_text(self, x, y, string, size=1, space=1):
    def pixel_x(char_number, char_column, point_row):
      char_offset = x + char_number * size * font.cols + space * char_number
      pixel_offset = char_offset + char_column * size + point_row
      return self.columns - pixel_offset

    def pixel_y(char_row, point_column):
      char_offset = y + char_row * size
      return char_offset + point_column

    def pixel_mask(char, char_column, char_row):
      char_index_offset = ord(char) * font.cols
      return font.bytes[char_index_offset + char_column] >> char_row & 0x1

    pixels = (
      (pixel_x(char_number, char_column, point_row),
       pixel_y(char_row, point_column),
       pixel_mask(char, char_column, char_row))
      for char_number, char in enumerate(string)
      for char_column in range(font.cols)
      for char_row in range(font.rows)
      for point_column in range(size)
      for point_row in range(1, size + 1))
    for pixel in pixels:
      self.set_pixel(*pixel)

显示需要字库，字库通过字符取模软件PCtoLCD2002生成，font.py如下：

cols = 5
rows = 8
bytes = [
    0x00, 0x00, 0x00, 0x00, 0x00,
    0x3E, 0x5B, 0x4F, 0x5B, 0x3E,
    0x3E, 0x6B, 0x4F, 0x6B, 0x3E,
    0x1C, 0x3E, 0x7C, 0x3E, 0x1C,
    0x18, 0x3C, 0x7E, 0x3C, 0x18,
    0x1C, 0x57, 0x7D, 0x57, 0x1C,
    0x1C, 0x5E, 0x7F, 0x5E, 0x1C,
    0x00, 0x18, 0x3C, 0x18, 0x00,
    0xFF, 0xE7, 0xC3, 0xE7, 0xFF,
    0x00, 0x18, 0x24, 0x18, 0x00,
    0xFF, 0xE7, 0xDB, 0xE7, 0xFF,
    0x30, 0x48, 0x3A, 0x06, 0x0E,
    0x26, 0x29, 0x79, 0x29, 0x26,
    0x40, 0x7F, 0x05, 0x05, 0x07,
    0x40, 0x7F, 0x05, 0x25, 0x3F,
    0x5A, 0x3C, 0xE7, 0x3C, 0x5A,
    0x7F, 0x3E, 0x1C, 0x1C, 0x08,
    0x08, 0x1C, 0x1C, 0x3E, 0x7F,
    0x14, 0x22, 0x7F, 0x22, 0x14,
    0x5F, 0x5F, 0x00, 0x5F, 0x5F,
    0x06, 0x09, 0x7F, 0x01, 0x7F,
    0x00, 0x66, 0x89, 0x95, 0x6A,
    0x60, 0x60, 0x60, 0x60, 0x60,
    0x94, 0xA2, 0xFF, 0xA2, 0x94,
    0x08, 0x04, 0x7E, 0x04, 0x08,
    0x10, 0x20, 0x7E, 0x20, 0x10,
    0x08, 0x08, 0x2A, 0x1C, 0x08,
    0x08, 0x1C, 0x2A, 0x08, 0x08,
    0x1E, 0x10, 0x10, 0x10, 0x10,
    0x0C, 0x1E, 0x0C, 0x1E, 0x0C,
    0x30, 0x38, 0x3E, 0x38, 0x30,
    0x06, 0x0E, 0x3E, 0x0E, 0x06,
    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, 0x56, 0x20, 0x50,
    0x00, 0x08, 0x07, 0x03, 0x00,
    0x00, 0x1C, 0x22, 0x41, 0x00,
    0x00, 0x41, 0x22, 0x1C, 0x00,
    0x2A, 0x1C, 0x7F, 0x1C, 0x2A,
    0x08, 0x08, 0x3E, 0x08, 0x08,
    0x00, 0x80, 0x70, 0x30, 0x00,
    0x08, 0x08, 0x08, 0x08, 0x08,
    0x00, 0x00, 0x60, 0x60, 0x00,
    0x20, 0x10, 0x08, 0x04, 0x02,
    0x3E, 0x51, 0x49, 0x45, 0x3E,
    0x00, 0x42, 0x7F, 0x40, 0x00,
    0x72, 0x49, 0x49, 0x49, 0x46,
    0x21, 0x41, 0x49, 0x4D, 0x33,
    0x18, 0x14, 0x12, 0x7F, 0x10,
    0x27, 0x45, 0x45, 0x45, 0x39,
    0x3C, 0x4A, 0x49, 0x49, 0x31,
    0x41, 0x21, 0x11, 0x09, 0x07,
    0x36, 0x49, 0x49, 0x49, 0x36,
    0x46, 0x49, 0x49, 0x29, 0x1E,
    0x00, 0x00, 0x14, 0x00, 0x00,
    0x00, 0x40, 0x34, 0x00, 0x00,
    0x00, 0x08, 0x14, 0x22, 0x41,
    0x14, 0x14, 0x14, 0x14, 0x14,
    0x00, 0x41, 0x22, 0x14, 0x08,
    0x02, 0x01, 0x59, 0x09, 0x06,
    0x3E, 0x41, 0x5D, 0x59, 0x4E,
    0x7C, 0x12, 0x11, 0x12, 0x7C,
    0x7F, 0x49, 0x49, 0x49, 0x36,
    0x3E, 0x41, 0x41, 0x41, 0x22,
    0x7F, 0x41, 0x41, 0x41, 0x3E,
    0x7F, 0x49, 0x49, 0x49, 0x41,
    0x7F, 0x09, 0x09, 0x09, 0x01,
    0x3E, 0x41, 0x41, 0x51, 0x73,
    0x7F, 0x08, 0x08, 0x08, 0x7F,
    0x00, 0x41, 0x7F, 0x41, 0x00,
    0x20, 0x40, 0x41, 0x3F, 0x01,
    0x7F, 0x08, 0x14, 0x22, 0x41,
    0x7F, 0x40, 0x40, 0x40, 0x40,
    0x7F, 0x02, 0x1C, 0x02, 0x7F,
    0x7F, 0x04, 0x08, 0x10, 0x7F,
    0x3E, 0x41, 0x41, 0x41, 0x3E,
    0x7F, 0x09, 0x09, 0x09, 0x06,
    0x3E, 0x41, 0x51, 0x21, 0x5E,
    0x7F, 0x09, 0x19, 0x29, 0x46,
    0x26, 0x49, 0x49, 0x49, 0x32,
    0x03, 0x01, 0x7F, 0x01, 0x03,
    0x3F, 0x40, 0x40, 0x40, 0x3F,
    0x1F, 0x20, 0x40, 0x20, 0x1F,
    0x3F, 0x40, 0x38, 0x40, 0x3F,
    0x63, 0x14, 0x08, 0x14, 0x63,
    0x03, 0x04, 0x78, 0x04, 0x03,
    0x61, 0x59, 0x49, 0x4D, 0x43,
    0x00, 0x7F, 0x41, 0x41, 0x41,
    0x02, 0x04, 0x08, 0x10, 0x20,
    0x00, 0x41, 0x41, 0x41, 0x7F,
    0x04, 0x02, 0x01, 0x02, 0x04,
    0x40, 0x40, 0x40, 0x40, 0x40,
    0x00, 0x03, 0x07, 0x08, 0x00,
    0x20, 0x54, 0x54, 0x78, 0x40,
    0x7F, 0x28, 0x44, 0x44, 0x38,
    0x38, 0x44, 0x44, 0x44, 0x28,
    0x38, 0x44, 0x44, 0x28, 0x7F,
    0x38, 0x54, 0x54, 0x54, 0x18,
    0x00, 0x08, 0x7E, 0x09, 0x02,
    0x18, 0xA4, 0xA4, 0x9C, 0x78,
    0x7F, 0x08, 0x04, 0x04, 0x78,
    0x00, 0x44, 0x7D, 0x40, 0x00,
    0x20, 0x40, 0x40, 0x3D, 0x00,
    0x7F, 0x10, 0x28, 0x44, 0x00,
    0x00, 0x41, 0x7F, 0x40, 0x00,
    0x7C, 0x04, 0x78, 0x04, 0x78,
    0x7C, 0x08, 0x04, 0x04, 0x78,
    0x38, 0x44, 0x44, 0x44, 0x38,
    0xFC, 0x18, 0x24, 0x24, 0x18,
    0x18, 0x24, 0x24, 0x18, 0xFC,
    0x7C, 0x08, 0x04, 0x04, 0x08,
    0x48, 0x54, 0x54, 0x54, 0x24,
    0x04, 0x04, 0x3F, 0x44, 0x24,
    0x3C, 0x40, 0x40, 0x20, 0x7C,
    0x1C, 0x20, 0x40, 0x20, 0x1C,
    0x3C, 0x40, 0x30, 0x40, 0x3C,
    0x44, 0x28, 0x10, 0x28, 0x44,
    0x4C, 0x90, 0x90, 0x90, 0x7C,
    0x44, 0x64, 0x54, 0x4C, 0x44,
    0x00, 0x08, 0x36, 0x41, 0x00,
    0x00, 0x00, 0x77, 0x00, 0x00,
    0x00, 0x41, 0x36, 0x08, 0x00,
    0x02, 0x01, 0x02, 0x04, 0x02,
    0x3C, 0x26, 0x23, 0x26, 0x3C,
    0x1E, 0xA1, 0xA1, 0x61, 0x12,
    0x3A, 0x40, 0x40, 0x20, 0x7A,
    0x38, 0x54, 0x54, 0x55, 0x59,
    0x21, 0x55, 0x55, 0x79, 0x41,
    0x21, 0x54, 0x54, 0x78, 0x41,
    0x21, 0x55, 0x54, 0x78, 0x40,
    0x20, 0x54, 0x55, 0x79, 0x40,
    0x0C, 0x1E, 0x52, 0x72, 0x12,
    0x39, 0x55, 0x55, 0x55, 0x59,
    0x39, 0x54, 0x54, 0x54, 0x59,
    0x39, 0x55, 0x54, 0x54, 0x58,
    0x00, 0x00, 0x45, 0x7C, 0x41,
    0x00, 0x02, 0x45, 0x7D, 0x42,
    0x00, 0x01, 0x45, 0x7C, 0x40,
    0xF0, 0x29, 0x24, 0x29, 0xF0,
    0xF0, 0x28, 0x25, 0x28, 0xF0,
    0x7C, 0x54, 0x55, 0x45, 0x00,
    0x20, 0x54, 0x54, 0x7C, 0x54,
    0x7C, 0x0A, 0x09, 0x7F, 0x49,
    0x32, 0x49, 0x49, 0x49, 0x32,
    0x32, 0x48, 0x48, 0x48, 0x32,
    0x32, 0x4A, 0x48, 0x48, 0x30,
    0x3A, 0x41, 0x41, 0x21, 0x7A,
    0x3A, 0x42, 0x40, 0x20, 0x78,
    0x00, 0x9D, 0xA0, 0xA0, 0x7D,
    0x39, 0x44, 0x44, 0x44, 0x39,
    0x3D, 0x40, 0x40, 0x40, 0x3D,
    0x3C, 0x24, 0xFF, 0x24, 0x24,
    0x48, 0x7E, 0x49, 0x43, 0x66,
    0x2B, 0x2F, 0xFC, 0x2F, 0x2B,
    0xFF, 0x09, 0x29, 0xF6, 0x20,
    0xC0, 0x88, 0x7E, 0x09, 0x03,
    0x20, 0x54, 0x54, 0x79, 0x41,
    0x00, 0x00, 0x44, 0x7D, 0x41,
    0x30, 0x48, 0x48, 0x4A, 0x32,
    0x38, 0x40, 0x40, 0x22, 0x7A,
    0x00, 0x7A, 0x0A, 0x0A, 0x72,
    0x7D, 0x0D, 0x19, 0x31, 0x7D,
    0x26, 0x29, 0x29, 0x2F, 0x28,
    0x26, 0x29, 0x29, 0x29, 0x26,
    0x30, 0x48, 0x4D, 0x40, 0x20,
    0x38, 0x08, 0x08, 0x08, 0x08,
    0x08, 0x08, 0x08, 0x08, 0x38,
    0x2F, 0x10, 0xC8, 0xAC, 0xBA,
    0x2F, 0x10, 0x28, 0x34, 0xFA,
    0x00, 0x00, 0x7B, 0x00, 0x00,
    0x08, 0x14, 0x2A, 0x14, 0x22,
    0x22, 0x14, 0x2A, 0x14, 0x08,
    0xAA, 0x00, 0x55, 0x00, 0xAA,
    0xAA, 0x55, 0xAA, 0x55, 0xAA,
    0x00, 0x00, 0x00, 0xFF, 0x00,
    0x10, 0x10, 0x10, 0xFF, 0x00,
    0x14, 0x14, 0x14, 0xFF, 0x00,
    0x10, 0x10, 0xFF, 0x00, 0xFF,
    0x10, 0x10, 0xF0, 0x10, 0xF0,
    0x14, 0x14, 0x14, 0xFC, 0x00,
    0x14, 0x14, 0xF7, 0x00, 0xFF,
    0x00, 0x00, 0xFF, 0x00, 0xFF,
    0x14, 0x14, 0xF4, 0x04, 0xFC,
    0x14, 0x14, 0x17, 0x10, 0x1F,
    0x10, 0x10, 0x1F, 0x10, 0x1F,
    0x14, 0x14, 0x14, 0x1F, 0x00,
    0x10, 0x10, 0x10, 0xF0, 0x00,
    0x00, 0x00, 0x00, 0x1F, 0x10,
    0x10, 0x10, 0x10, 0x1F, 0x10,
    0x10, 0x10, 0x10, 0xF0, 0x10,
    0x00, 0x00, 0x00, 0xFF, 0x10,
    0x10, 0x10, 0x10, 0x10, 0x10,
    0x10, 0x10, 0x10, 0xFF, 0x10,
    0x00, 0x00, 0x00, 0xFF, 0x14,
    0x00, 0x00, 0xFF, 0x00, 0xFF,
    0x00, 0x00, 0x1F, 0x10, 0x17,
    0x00, 0x00, 0xFC, 0x04, 0xF4,
    0x14, 0x14, 0x17, 0x10, 0x17,
    0x14, 0x14, 0xF4, 0x04, 0xF4,
    0x00, 0x00, 0xFF, 0x00, 0xF7,
    0x14, 0x14, 0x14, 0x14, 0x14,
    0x14, 0x14, 0xF7, 0x00, 0xF7,
    0x14, 0x14, 0x14, 0x17, 0x14,
    0x10, 0x10, 0x1F, 0x10, 0x1F,
    0x14, 0x14, 0x14, 0xF4, 0x14,
    0x10, 0x10, 0xF0, 0x10, 0xF0,
    0x00, 0x00, 0x1F, 0x10, 0x1F,
    0x00, 0x00, 0x00, 0x1F, 0x14,
    0x00, 0x00, 0x00, 0xFC, 0x14,
    0x00, 0x00, 0xF0, 0x10, 0xF0,
    0x10, 0x10, 0xFF, 0x10, 0xFF,
    0x14, 0x14, 0x14, 0xFF, 0x14,
    0x10, 0x10, 0x10, 0x1F, 0x00,
    0x00, 0x00, 0x00, 0xF0, 0x10,
    0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
    0xF0, 0xF0, 0xF0, 0xF0, 0xF0,
    0xFF, 0xFF, 0xFF, 0x00, 0x00,
    0x00, 0x00, 0x00, 0xFF, 0xFF,
    0x0F, 0x0F, 0x0F, 0x0F, 0x0F,
    0x38, 0x44, 0x44, 0x38, 0x44,
    0x7C, 0x2A, 0x2A, 0x3E, 0x14,
    0x7E, 0x02, 0x02, 0x06, 0x06,
    0x02, 0x7E, 0x02, 0x7E, 0x02,
    0x63, 0x55, 0x49, 0x41, 0x63,
    0x38, 0x44, 0x44, 0x3C, 0x04,
    0x40, 0x7E, 0x20, 0x1E, 0x20,
    0x06, 0x02, 0x7E, 0x02, 0x02,
    0x99, 0xA5, 0xE7, 0xA5, 0x99,
    0x1C, 0x2A, 0x49, 0x2A, 0x1C,
    0x4C, 0x72, 0x01, 0x72, 0x4C,
    0x30, 0x4A, 0x4D, 0x4D, 0x30,
    0x30, 0x48, 0x78, 0x48, 0x30,
    0xBC, 0x62, 0x5A, 0x46, 0x3D,
    0x3E, 0x49, 0x49, 0x49, 0x00,
    0x7E, 0x01, 0x01, 0x01, 0x7E,
    0x2A, 0x2A, 0x2A, 0x2A, 0x2A,
    0x44, 0x44, 0x5F, 0x44, 0x44,
    0x40, 0x51, 0x4A, 0x44, 0x40,
    0x40, 0x44, 0x4A, 0x51, 0x40,
    0x00, 0x00, 0xFF, 0x01, 0x03,
    0xE0, 0x80, 0xFF, 0x00, 0x00,
    0x08, 0x08, 0x6B, 0x6B, 0x08,
    0x36, 0x12, 0x36, 0x24, 0x36,
    0x06, 0x0F, 0x09, 0x0F, 0x06,
    0x00, 0x00, 0x18, 0x18, 0x00,
    0x00, 0x00, 0x10, 0x10, 0x00,
    0x30, 0x40, 0xFF, 0x01, 0x01,
    0x00, 0x1F, 0x01, 0x01, 0x1E,
    0x00, 0x19, 0x1D, 0x17, 0x12,
    0x00, 0x3C, 0x3C, 0x3C, 0x3C,
    0x00, 0x00, 0x00, 0x00, 0x00]
byte2 = {

0xE6B8A9:
    [
    0x00,0x23,0x12,0x12,0x83,0x42,0x42,0x13,0x10,0x27,0xE4,0x24,0x24,0x24,0x2F,0x00,
    0x00,0xF8,0x08,0x08,0xF8,0x08,0x08,0xF8,0x00,0xFC,0xA4,0xA4,0xA4,0xA4,0xFE,0x00
    ],#温
0xE6B9BF:
    [
    0x00,0x27,0x14,0x14,0x87,0x44,0x44,0x17,0x11,0x21,0xE9,0x25,0x23,0x21,0x2F,0x00,
    0x00,0xF8,0x08,0x08,0xF8,0x08,0x08,0xF8,0x20,0x20,0x24,0x28,0x30,0x20,0xFE,0x00
    ],#湿
0xE5BAA6:
    [
    0x01,0x00,0x3F,0x22,0x22,0x3F,0x22,0x22,0x23,0x20,0x2F,0x24,0x42,0x41,0x86,0x38,
    0x00,0x80,0xFE,0x20,0x20,0xFC,0x20,0x20,0xE0,0x00,0xF0,0x10,0x20,0xC0,0x30,0x0E
    ],#度
}

byte3 = {
0:
	[0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00],#" ",0
1:
	[0x00,0x00,0x00,0x10,0x10,0x10,0x10,0x10,0x10,0x10,0x00,0x00,0x10,0x10,0x00,0x00],#"!",1
2:
	[0x00,0x12,0x24,0x24,0x48,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00],#""",2
3:
	[0x00,0x00,0x00,0x12,0x12,0x12,0x7E,0x24,0x24,0x24,0x7E,0x24,0x24,0x24,0x00,0x00],#"#",3
4:
	[0x00,0x00,0x08,0x3C,0x4A,0x4A,0x48,0x38,0x0C,0x0A,0x0A,0x4A,0x4A,0x3C,0x08,0x08],#"$",4
5:
	[0x00,0x00,0x00,0x44,0xA4,0xA8,0xA8,0xB0,0x54,0x1A,0x2A,0x2A,0x4A,0x44,0x00,0x00],#"%",5
6:
	[0x00,0x00,0x00,0x30,0x48,0x48,0x48,0x50,0x6E,0xA4,0x94,0x98,0x89,0x76,0x00,0x00],#"&",6
7:
	[0x00,0x60,0x20,0x20,0x40,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00],#"'",7
8:
	[0x00,0x02,0x04,0x08,0x08,0x10,0x10,0x10,0x10,0x10,0x10,0x08,0x08,0x04,0x02,0x00],#"(",8
9:
	[0x00,0x40,0x20,0x10,0x10,0x08,0x08,0x08,0x08,0x08,0x08,0x10,0x10,0x20,0x40,0x00],#")",9
10:
	[0x00,0x00,0x00,0x00,0x10,0x10,0xD6,0x38,0x38,0xD6,0x10,0x10,0x00,0x00,0x00,0x00],#"*",10
11:
	[0x00,0x00,0x00,0x00,0x00,0x08,0x08,0x08,0x7F,0x08,0x08,0x08,0x00,0x00,0x00,0x00],#"+",11
12:
	[0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x60,0x20,0x20,0x40],#",",12
13:
	[0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x7E,0x00,0x00,0x00,0x00,0x00,0x00,0x00],#"-",13
14:
	[0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x60,0x60,0x00,0x00],#".",14
15:
	[0x00,0x00,0x02,0x04,0x04,0x04,0x08,0x08,0x10,0x10,0x10,0x20,0x20,0x40,0x40,0x00],#"/",15
16:
	[0x00,0x00,0x00,0x18,0x24,0x42,0x42,0x42,0x42,0x42,0x42,0x42,0x24,0x18,0x00,0x00],#"0",16
17:
	[0x00,0x00,0x00,0x08,0x38,0x08,0x08,0x08,0x08,0x08,0x08,0x08,0x08,0x3E,0x00,0x00],#"1",17
18:
	[0x00,0x00,0x00,0x3C,0x42,0x42,0x42,0x02,0x04,0x08,0x10,0x20,0x42,0x7E,0x00,0x00],#"2",18
19:
	[0x00,0x00,0x00,0x3C,0x42,0x42,0x02,0x04,0x18,0x04,0x02,0x42,0x42,0x3C,0x00,0x00],#"3",19
20:
	[0x00,0x00,0x00,0x04,0x0C,0x0C,0x14,0x24,0x24,0x44,0x7F,0x04,0x04,0x1F,0x00,0x00],#"4",20
21:
	[0x00,0x00,0x00,0x7E,0x40,0x40,0x40,0x78,0x44,0x02,0x02,0x42,0x44,0x38,0x00,0x00],#"5",21
22:
	[0x00,0x00,0x00,0x18,0x24,0x40,0x40,0x5C,0x62,0x42,0x42,0x42,0x22,0x1C,0x00,0x00],#"6",22
23:
	[0x00,0x00,0x00,0x7E,0x42,0x04,0x04,0x08,0x08,0x10,0x10,0x10,0x10,0x10,0x00,0x00],#"7",23
24:
	[0x00,0x00,0x00,0x3C,0x42,0x42,0x42,0x24,0x18,0x24,0x42,0x42,0x42,0x3C,0x00,0x00],#"8",24
25:
	[0x00,0x00,0x00,0x38,0x44,0x42,0x42,0x42,0x46,0x3A,0x02,0x02,0x24,0x18,0x00,0x00],#"9",25
26:
	[0x00,0x00,0x00,0x00,0x00,0x00,0x18,0x18,0x00,0x00,0x00,0x00,0x18,0x18,0x00,0x00],#":",26
27:
	[0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x10,0x00,0x00,0x00,0x00,0x00,0x10,0x10,0x10],#";",27
28:
	[0x00,0x00,0x00,0x02,0x04,0x08,0x10,0x20,0x40,0x20,0x10,0x08,0x04,0x02,0x00,0x00],#"<",28
29:
	[0x00,0x00,0x00,0x00,0x00,0x00,0x7E,0x00,0x00,0x7E,0x00,0x00,0x00,0x00,0x00,0x00],#"=",29
30:
	[0x00,0x00,0x00,0x40,0x20,0x10,0x08,0x04,0x02,0x04,0x08,0x10,0x20,0x40,0x00,0x00],#">",30
31:
	[0x00,0x00,0x00,0x3C,0x42,0x42,0x62,0x04,0x08,0x08,0x08,0x00,0x18,0x18,0x00,0x00],#"?",31
32:
	[0x00,0x00,0x00,0x38,0x44,0x5A,0xAA,0xAA,0xAA,0xAA,0xAA,0x5C,0x42,0x3C,0x00,0x00],#"@",32
33:
	[0x00,0x00,0x00,0x10,0x10,0x18,0x28,0x28,0x24,0x3C,0x44,0x42,0x42,0xE7,0x00,0x00],#"A",33
34:
	[0x00,0x00,0x00,0xF8,0x44,0x44,0x44,0x78,0x44,0x42,0x42,0x42,0x44,0xF8,0x00,0x00],#"B",34
35:
	[0x00,0x00,0x00,0x3E,0x42,0x42,0x80,0x80,0x80,0x80,0x80,0x42,0x44,0x38,0x00,0x00],#"C",35
36:
	[0x00,0x00,0x00,0xF8,0x44,0x42,0x42,0x42,0x42,0x42,0x42,0x42,0x44,0xF8,0x00,0x00],#"D",36
37:
	[0x00,0x00,0x00,0xFC,0x42,0x48,0x48,0x78,0x48,0x48,0x40,0x42,0x42,0xFC,0x00,0x00],#"E",37
38:
	[0x00,0x00,0x00,0xFC,0x42,0x48,0x48,0x78,0x48,0x48,0x40,0x40,0x40,0xE0,0x00,0x00],#"F",38
39:
	[0x00,0x00,0x00,0x3C,0x44,0x44,0x80,0x80,0x80,0x8E,0x84,0x44,0x44,0x38,0x00,0x00],#"G",39
40:
	[0x00,0x00,0x00,0xE7,0x42,0x42,0x42,0x42,0x7E,0x42,0x42,0x42,0x42,0xE7,0x00,0x00],#"H",40
41:
	[0x00,0x00,0x00,0x7C,0x10,0x10,0x10,0x10,0x10,0x10,0x10,0x10,0x10,0x7C,0x00,0x00],#"I",41
42:
	[0x00,0x00,0x00,0x3E,0x08,0x08,0x08,0x08,0x08,0x08,0x08,0x08,0x08,0x08,0x88,0xF0],#"J",42
43:
	[0x00,0x00,0x00,0xEE,0x44,0x48,0x50,0x70,0x50,0x48,0x48,0x44,0x44,0xEE,0x00,0x00],#"K",43
44:
	[0x00,0x00,0x00,0xE0,0x40,0x40,0x40,0x40,0x40,0x40,0x40,0x40,0x42,0xFE,0x00,0x00],#"L",44
45:
	[0x00,0x00,0x00,0xEE,0x6C,0x6C,0x6C,0x6C,0x6C,0x54,0x54,0x54,0x54,0xD6,0x00,0x00],#"M",45
46:
	[0x00,0x00,0x00,0xC7,0x62,0x62,0x52,0x52,0x4A,0x4A,0x4A,0x46,0x46,0xE2,0x00,0x00],#"N",46
47:
	[0x00,0x00,0x00,0x38,0x44,0x82,0x82,0x82,0x82,0x82,0x82,0x82,0x44,0x38,0x00,0x00],#"O",47
48:
	[0x00,0x00,0x00,0xFC,0x42,0x42,0x42,0x42,0x7C,0x40,0x40,0x40,0x40,0xE0,0x00,0x00],#"P",48
49:
	[0x00,0x00,0x00,0x38,0x44,0x82,0x82,0x82,0x82,0x82,0x82,0xB2,0x4C,0x38,0x06,0x00],#"Q",49
50:
	[0x00,0x00,0x00,0xFC,0x42,0x42,0x42,0x7C,0x48,0x48,0x44,0x44,0x42,0xE3,0x00,0x00],#"R",50
51:
	[0x00,0x00,0x00,0x3E,0x42,0x42,0x40,0x20,0x18,0x04,0x02,0x42,0x42,0x7C,0x00,0x00],#"S",51
52:
	[0x00,0x00,0x00,0xFE,0x92,0x10,0x10,0x10,0x10,0x10,0x10,0x10,0x10,0x38,0x00,0x00],#"T",52
53:
	[0x00,0x00,0x00,0xE7,0x42,0x42,0x42,0x42,0x42,0x42,0x42,0x42,0x42,0x3C,0x00,0x00],#"U",53
54:
	[0x00,0x00,0x00,0xE7,0x42,0x42,0x44,0x24,0x24,0x28,0x28,0x18,0x10,0x10,0x00,0x00],#"V",54
55:
	[0x00,0x00,0x00,0xD6,0x54,0x54,0x54,0x54,0x54,0x6C,0x28,0x28,0x28,0x28,0x00,0x00],#"W",55
56:
	[0x00,0x00,0x00,0xE7,0x42,0x24,0x24,0x18,0x18,0x18,0x24,0x24,0x42,0xE7,0x00,0x00],#"X",56
57:
	[0x00,0x00,0x00,0xEE,0x44,0x44,0x28,0x28,0x10,0x10,0x10,0x10,0x10,0x38,0x00,0x00],#"Y",57
58:
	[0x00,0x00,0x00,0x7E,0x84,0x04,0x08,0x08,0x10,0x20,0x20,0x42,0x42,0xFC,0x00,0x00],#"Z",58
59:
	[0x00,0x1E,0x10,0x10,0x10,0x10,0x10,0x10,0x10,0x10,0x10,0x10,0x10,0x10,0x1E,0x00],#"[",59
60:
	[0x00,0x00,0x40,0x20,0x20,0x20,0x10,0x10,0x10,0x08,0x08,0x04,0x04,0x04,0x02,0x02],#"\",60
61:
	[0x00,0x78,0x08,0x08,0x08,0x08,0x08,0x08,0x08,0x08,0x08,0x08,0x08,0x08,0x78,0x00],#"]",61
62:
	[0x00,0x18,0x24,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00],#"^",62
63:
	[0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0xFF],#"_",63
64:
	[0x00,0x60,0x10,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00],#"`",64
65:
	[0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x38,0x44,0x0C,0x34,0x44,0x4C,0x36,0x00,0x00],#"a",65
66:
	[0x00,0x00,0x00,0x00,0xC0,0x40,0x40,0x58,0x64,0x42,0x42,0x42,0x64,0x58,0x00,0x00],#"b",66
67:
	[0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x1C,0x22,0x40,0x40,0x40,0x22,0x1C,0x00,0x00],#"c",67
68:
	[0x00,0x00,0x00,0x00,0x06,0x02,0x02,0x3E,0x42,0x42,0x42,0x42,0x46,0x3B,0x00,0x00],#"d",68
69:
	[0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x3C,0x42,0x42,0x7E,0x40,0x42,0x3C,0x00,0x00],#"e",69
70:
	[0x00,0x00,0x00,0x00,0x0C,0x12,0x10,0x7C,0x10,0x10,0x10,0x10,0x10,0x7C,0x00,0x00],#"f",70
71:
	[0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x3E,0x44,0x44,0x38,0x40,0x3C,0x42,0x42,0x3C],#"g",71
72:
	[0x00,0x00,0x00,0x00,0xC0,0x40,0x40,0x5C,0x62,0x42,0x42,0x42,0x42,0xE7,0x00,0x00],#"h",72
73:
	[0x00,0x00,0x00,0x30,0x30,0x00,0x00,0x70,0x10,0x10,0x10,0x10,0x10,0x7C,0x00,0x00],#"i",73
74:
	[0x00,0x00,0x00,0x0C,0x0C,0x00,0x00,0x1C,0x04,0x04,0x04,0x04,0x04,0x04,0x44,0x78],#"j",74
75:
	[0x00,0x00,0x00,0x00,0xC0,0x40,0x40,0x4E,0x48,0x50,0x70,0x48,0x44,0xEE,0x00,0x00],#"k",75
76:
	[0x00,0x00,0x00,0x10,0x70,0x10,0x10,0x10,0x10,0x10,0x10,0x10,0x10,0x7C,0x00,0x00],#"l",76
77:
	[0x00,0x00,0x00,0x00,0x00,0x00,0x00,0xFE,0x49,0x49,0x49,0x49,0x49,0xED,0x00,0x00],#"m",77
78:
	[0x00,0x00,0x00,0x00,0x00,0x00,0x00,0xDC,0x62,0x42,0x42,0x42,0x42,0xE7,0x00,0x00],#"n",78
79:
	[0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x3C,0x42,0x42,0x42,0x42,0x42,0x3C,0x00,0x00],#"o",79
80:
	[0x00,0x00,0x00,0x00,0x00,0x00,0x00,0xD8,0x64,0x42,0x42,0x42,0x64,0x58,0x40,0xE0],#"p",80
81:
	[0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x1A,0x26,0x42,0x42,0x42,0x26,0x1A,0x02,0x07],#"q",81
82:
	[0x00,0x00,0x00,0x00,0x00,0x00,0x00,0xEE,0x32,0x20,0x20,0x20,0x20,0xF8,0x00,0x00],#"r",82
83:
	[0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x3E,0x42,0x40,0x3C,0x02,0x42,0x7C,0x00,0x00],#"s",83
84:
	[0x00,0x00,0x00,0x00,0x00,0x10,0x10,0x7C,0x10,0x10,0x10,0x10,0x12,0x0C,0x00,0x00],#"t",84
85:
	[0x00,0x00,0x00,0x00,0x00,0x00,0x00,0xC6,0x42,0x42,0x42,0x42,0x46,0x3B,0x00,0x00],#"u",85
86:
	[0x00,0x00,0x00,0x00,0x00,0x00,0x00,0xEE,0x44,0x44,0x28,0x28,0x10,0x10,0x00,0x00],#"v",86
87:
	[0x00,0x00,0x00,0x00,0x00,0x00,0x00,0xDB,0x89,0x4A,0x5A,0x54,0x24,0x24,0x00,0x00],#"w",87
88:
	[0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x76,0x24,0x18,0x18,0x18,0x24,0x6E,0x00,0x00],#"x",88
89:
	[0x00,0x00,0x00,0x00,0x00,0x00,0x00,0xE7,0x42,0x24,0x24,0x18,0x18,0x10,0x10,0x60],#"y",89
90:
	[0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x7E,0x44,0x08,0x10,0x10,0x22,0x7E,0x00,0x00],#"z",90
91:
	[0x00,0x03,0x04,0x04,0x04,0x04,0x04,0x04,0x08,0x04,0x04,0x04,0x04,0x04,0x03,0x00],#"{",91
92:
	[0x08,0x08,0x08,0x08,0x08,0x08,0x08,0x08,0x08,0x08,0x08,0x08,0x08,0x08,0x08,0x08],#"|",92
93:
	[0x00,0xC0,0x20,0x20,0x20,0x20,0x20,0x20,0x10,0x20,0x20,0x20,0x20,0x20,0xC0,0x00],#"}",93
94:
	[0x20,0x5A,0x04,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00],#"~",94
}

三、OLED定时刷新温湿度

test.py测试代码如下：

from machine import Pin,Timer
from ssd1306 import SSD1306
import math
import font
import dht11

count=0

def time_interrupt(timer):                #定时器中断服务函数
    global count
    count +=1
    
    if count%2==0 :                       #LED 1秒闪烁一次
      LED.on()
    else:
      LED.off()
      
    temp = d.temperature()                #获取温度
    humi = d.humidity()                   #获取湿度
    print("temp: "+str(temp) + "\thumidity: " + str(humi))
    display.draw_chinese('温度',1,2)        #显示中文
    display.draw_chinese('湿度',1,4) 
    display.draw_string(':'+str(temp),6,2)  #显示温度
    display.draw_string(':'+str(humi),6,4)  #显示湿度
    display.draw_text(40,56,'Loop:'+str(count),)
    display.display()


if __name__ == '__main__':
  
  LED = Pin(2, Pin.OUT, value=0)  #LED灯引脚
  LED.on()
  
  d = dht11.DHT11(Pin(18))        #dht11引脚
  d.measure()                     
  
  tim0 = Timer(0)                 #创建定时器
  #开启定时器中断，每隔1秒触发一次
  tim0.init(period=1000, mode=Timer.PERIODIC, callback=time_interrupt) 
  
  display = SSD1306()             #OLED

  display.init_display()          #初始化
  display.draw_text(16,0,'ESP32 Micropython',)
  display.display()

四、烧录并测试

在uPyCraft下，workSpace目录下为新建的项目文件，当把设备连上时，device也会有文件，此文件为下载到ESP32里的文件，如下图：
在这里插入图片描述
将DHT11和SSD1306接入ESP32的相应引脚。
依次将dht11.py、font.py、ssd1306.py文件通过uPyCraft的Tools->Download下载进ESP32，然后通过Tools->DownloadAndRun下载test.py并运行。
串口打印如下：

OLED显示如下：