物联网开发105 - Micropython ESP32连接AHT20温湿度模块和ST7735s屏幕显示温湿度_micropython st7735

本文链接：https://blog.youkuaiyun.com/2401_87557120/article/details/143735153

from ufont import BMFont
from ahtx0 import AHT20

import time

spi = SPI(2,baudrate=80_000_000,polarity = 0,sck = Pin(18),mosi = Pin(23))
tft = ST7735(spi,rst=4, dc=2, cs=5,bl=19,width=128,height=160, rotate=0)
i2c = I2C(1,scl = Pin(25),sda = Pin(26),freq = 400_000) # 默认I2C1是25和26Pin
aht = AHT20(i2c)

font = BMFont(“font.bmf”)

def ahtxx():

temp = aht.temperature
humi = aht.relative_humidity

font.text(tft,"温度= %.2f ℃"%(temp),10,36,color(255,255,255),font_size=16,reverse=False,clear=False,show=True,auto_wrap=True)
font.text(tft,"湿度= %.2f %s" %(humi,'%'),10,56,color(255,255,255),font_size=16,reverse=False,clear=False,show=True,auto_wrap=True)

time.sleep(0.1)

def main():
tft.init()
#tft.fill(color(0,0,0))
#tft.show()
font.text(tft,“温湿度”,36,0,color(0,255,0),font_size=16,reverse=False,clear=True,show=True,auto_wrap=True)
tft.hline(0,25,160,color(255,255,255))
tft.show()

#font.text(tft,"%#x"%i2c.scan()[0],0,50,color(0,255,0),font_size=32,reverse=False,clear=False,show=True,auto_wrap=True)

while True:
    ahtxx()

if name == “main”:
main()


显示效果：


![](https://img-blog.csdnimg.cn/532e660eaa4248dabe71597e630111d1.png)


 


**四、示例代码2**


温湿度横屏显示.py

from machine import Pin,SPI,I2C,PWM
from st7735s import ST7735,color
from ufont import BMFont
from ahtx0 import AHT20

import time

spi = SPI(2,baudrate=80_000_000,polarity = 0,sck = Pin(18),mosi = Pin(23))
tft = ST7735(spi,rst=4, dc=2, cs=5,bl=19,width=160,height=128, rotate=1)
i2c = I2C(1,scl = Pin(25),sda = Pin(26),freq = 400_000) # 默认I2C1是25和26Pin
aht = AHT20(i2c)

font = BMFont(“font.bmf”)

def ahtxx():

temp = aht.temperature
humi = aht.relative_humidity

font.text(tft,"温度= %.2f ℃"%(temp),10,36,color(255,255,255),font_size=16,reverse=False,clear=False,show=True,auto_wrap=True)
font.text(tft,"湿度= %.2f %s" %(humi,'%'),10,56,color(255,255,255),font_size=16,reverse=False,clear=False,show=True,auto_wrap=True)

time.sleep(0.1)

#font.text(tft,"%#x"%i2c.scan()[0],0,50,color(0,255,0),font_size=32,reverse=False,clear=False,show=True,auto_wrap=True)

while True:
    ahtxx()

if name == “main”:
main()


显示效果：


![](https://img-blog.csdnimg.cn/ef2a6f8da6424039a3030e759e6f19b6.png)


**五、st7735s屏幕驱动**


st7735s.py

“”"
合宙 Air10x 系列屏幕扩展板驱动
160(H)RGB x 80(V)

使用方法(以合宙ESP32C3为例):
from machine import SPI, Pin
from st7735 import ST7735

spi = SPI(1, 30000000, sck=Pin(2), mosi=Pin(3))
ST7735(spi, rst=10, dc=6, cs=7, bl=11, width=160, height=80, rotate=1)  # 直插横屏显示
ST7735(spi, rst=10, dc=6, cs=7, bl=11, width=160, height=80, rotate=0)  # 直插竖屏显示

本款LCD使用的内置控制器为ST7735S，是一款162 x RGB x 132像素的LCD控制器,而本LCD本身的像素为160(H)RGB x 80(V)。由于LCD的显示
起始位置与控制器的原点不一致，因此在使用控制器初始化显示全屏显示区域时需要对做偏移处理：水平方向从第二个像素点开始显示，垂直方向从第27个像素点
开始。这样就可以保证显示的LCD中RAM对应的位置与实际一致。(https://www.waveshare.net/wiki/Pico-LCD-0.96)

屏幕详细信息: https://wiki.luatos.com/peripherals/lcd_air10x/index.html
ST7735S文档: https://www.waveshare.net/w/upload/e/e2/ST7735S_V1.1_20111121.pdf
FrameBuf文档: https://docs.micropython.org/en/latest/library/framebuf.html
“”"
import gc
import time
import math

import machine
import framebuf
from micropython import const

SWRESET = const(0x01)
SLPOUT = const(0x11)
NORON = const(0x13)

INVOFF = const(0x20)
DISPON = const(0x29)
CASET = const(0x2A)
RASET = const(0x2B)