嵌入式物联网实战开发例程18-ESP32读取ds18b20温度传感器值（MicroPythion版例程）.rar

""" ****************************************************************************** * @file main.py * @author * @version V1.0 * @date 2023-12-01 * @brief DS18B20实验 ****************************************************************************** * * 实验目的：读取DS18B20传感器的温度值 * * 硬件资源及引脚分配： * 1, LED --> ESP32S3 IO * LED --> IO1 * 2, XL9555 --> ESP32S3 IO * SCL --> IO42 * SDA --> IO41 * 3, SPI_LCD --> ESP32S3 IO / XL9555 * CS --> IO21 * SCK --> IO12 * SDA --> IO11 * DC --> IO40(跳线帽连接) * PWR --> XL9555_P13 * RST --> XL9555_P12 * 4, DS18B20 --> ESP32S3 IO * DQ --> IO0(跳线帽连接) * * 实验现象 * 1, 程序下载成功后，LCD显示屏实时更新温度值。 * 2, LED闪烁，提示程序运行。 * * 注意事项 * 无 * * 定制开发，技术V:349014857 * 更多例程：https://iot666.blog.csdn.net/ * 开发咨询：http://doc.yotill.com """ from machine import Pin,SPI,I2C import onewire, ds18x20 import atk_xl9555 as io_ex import atk_lcd as lcd import time """ * @brief 程序入口 * @param 无 * @retval 无 """ if __name__ == '__main__': # 初始化LED并输出高电平 led = Pin(1,Pin.OUT,value = 1) # IIC初始化 i2c0 = I2C(0, scl = Pin(42), sda = Pin(41), freq = 400000) # XL9555初始化 xl9555 = io_ex.init(i2c0) # 复位LCD xl9555.write_bit(io_ex.SLCD_RST,0) time.sleep_ms(100) xl9555.write_bit(io_ex.SLCD_RST,1) time.sleep_ms(100) # 初始化SPI spi = SPI(2,baudrate = 80000000, sck = Pin(12), mosi = Pin(11), miso = Pin(13)) # 初始化LCD,lcd = 0为####2.4寸屏幕;lcd = 1为####1.3寸SPILCD屏幕; display = lcd.init(spi,dc = Pin(40,Pin.OUT,Pin.PULL_UP,value = 1),cs = Pin(21,Pin.OUT,Pin.PULL_UP,value = 1),dir = 1,lcd = 0) # 开启背光 xl9555.write_bit(io_ex.SLCD_PWR,1) time.sleep_ms(100) # 提示实验信息 display.string(30, 50, 240, 32, 32, "ESP32-S3",lcd.RED) display.string(30, 80, 240, 24, 24, "DS18B20 TEST",lcd.RED) display.string(30, 110, 240, 16, 16, "ATOM@ALIENTEK",lcd.RED) display.string(30, 130, 200, 16, 16, "TEMPERATE: 00.00C", lcd.BLUE) # 初始化DS18B20 ds_18b20 = ds18x20.DS18X20(onewire.OneWire(Pin(0))) """ * @brief 读取ds18x20温度值 * @param 无 * @retval 无 """ def read_sensor(): # 发现设备 roms = ds_18b20.scan() # 获取数值 ds_18b20.convert_temp() for rom in roms: temp = ds_18b20.read_temp(rom) if isinstance(temp, float): temp = round(temp, 2) return temp while True: # 打印温度值 umber = float(read_sensor()) display.num(30 + 11 * 8,130,int(umber),2,16,lcd.RED) display.num(30 + 14 * 8,130,int(umber * 100 % 100),2,16,lcd.RED) led_state = led.value() led.value(not led_state) time.sleep(1)