一、目的

        这一节我们来学习如何使用ESP32 C3,连接0.96寸ssd1306屏幕、MG90S舵机、Motor Module直流电机带扇叶PWM调速小风扇模块,滑动变阻器模块来搭建我们的环境。最后,通过滑动电阻器的改变开控制舵机转动的角度和马达的转速,并将滑动变阻器的模拟值、舵机转动的角度和马达的电压值显示在屏幕上。

二、环境

        ESP32 C3开发板(MicroPython v1.19.1 on 2022-06-18)+ I2C.96寸ssd1306屏幕模块+  MG90S舵机 + PWM调速小风扇模块 + 几根杜邦线 + Win10商业

        ESP32和各个模块接线方法:


三、环境

 adc.py

from machine import Pin,SoftI2C,PWM,ADC
from ssd1306 import SSD1306_I2C

from ufont import BMFont
import time

i2c  = SoftI2C(scl = Pin(2),sda = Pin(3),freq = 400_000)
oled = SSD1306_I2C(128,64,i2c,0x3c)

#freq = 40Mhz duty = 1023 4095 获取的值/最带宽带12bit4095 * 1023
motora = PWM(Pin(8),duty=(0),freq = 4095)  #4.095khz   #风扇
motorb = PWM(Pin(6),duty=(0),freq = 50)  #50hz 1/20=50 #舵机

font = BMFont("fonts/unifont-14-12888-16.v3.bmf")

adc = ADC(Pin(5))
adc.atten(ADC.ATTN_11DB)
adc.width(ADC.WIDTH_12BIT)  #4095

def main():
  
    font.text(oled,"电压值:",0,16, color=1,font_size=16,reverse=False,clear=False,show=True,half_char=True, auto_wrap=True)
    font.text(oled,"模拟值:",0,32, color=1,font_size=16,reverse=False,clear=False,show=True,half_char=True, auto_wrap=True)
    font.text(oled,"角度值:",0,48, color=1,font_size=16,reverse=False,clear=False,show=True,half_char=True, auto_wrap=True)

    while True:
        temp = adc.read()
        
        c = int(temp/22.75) #0-180
        motorb.duty(int((c/180 * 2 + 0.5)/20*1023))
        
        motora.duty(int((temp/4095)*1023))
        
        font.text(oled," %.1f  V"%((temp/4095)*3.3),60,16, color=1,font_size=16,reverse=False,clear=False,show=True,half_char=True, auto_wrap=True)
        font.text(oled,"%4d mV"%(temp),60,32,color=1,font_size=16,reverse=False,clear=False,show=True,half_char=True, auto_wrap=True)
        font.text(oled," %3d 度"%(c),60,48,color=1,font_size=16,reverse=False,clear=False,show=True,half_char=True, auto_wrap=True)
        
        #print("%d"%(int((temp/4095)*1023))) #0-3.3v
        #print("%d mv %.1f v"%(temp,(temp/4095)*3.3)) #0-3.3v
        
        
if __name__ == "__main__":
    main()

演示效果:

四、ssd1306屏幕驱动和字库文件

         请从下文获取:

物联网开发107 - Micropython ESP32 C3接DS1307时钟模块在SSD1306屏幕上显示时间_魔都飘雪的博客-CSDN博客Micropython ESP32 C3连接DS1307时钟模块在SSD1306屏幕上显示时间https://blog.csdn.net/zhusongziye/article/details/130535482?spm=1001.2014.3001.5502五、模块购买

1,滑动变阻器

电子积木 滑动电位器 滑调电位器模块

https://item.taobao.com/item.htm?spm=a1z09.2.0.0.67002e8dd6gcvb&id=609501321334&_u=bp01rcha724icon-default.png?t=N3I4https://item.taobao.com/item.htm?spm=a1z09.2.0.0.67002e8dd6gcvb&id=609501321334&_u=bp01rcha724

链接: https://pan.baidu.com/s/1ZzvLN41fJjvK0BaAmGSA-g  
提取码:s4hj 

采用优质滑动电器,性能稳定可靠

双路模拟量输出,输出0-VCC模拟量电压信号

尺寸:90*20mm

重量:20g

电压:3.3V、5V

端口:模拟量

阻值:10K

2,PWM马达

Motor Module 直流电机带扇叶PWM调速小风扇模块 PH2.0-3pin接口

https://item.taobao.com/item.htm?spm=a1z09.2.0.0.67002e8dd6gcvb&id=688559122412&_u=bp01rch42acicon-default.png?t=N3I4https://item.taobao.com/item.htm?spm=a1z09.2.0.0.67002e8dd6gcvb&id=688559122412&_u=bp01rch42ac

 

 

3,舵机

SG90/5010 MG90s MG995/996R舵机直升机9g遥控飞机马达固定翼航模

https://item.taobao.com/item.htm?spm=a1z09.2.0.0.67002e8dd6gcvb&id=559258153136&_u=bp01rch29d7icon-default.png?t=N3I4https://item.taobao.com/item.htm?spm=a1z09.2.0.0.67002e8dd6gcvb&id=559258153136&_u=bp01rch29d7

 

 

资料例程链接:https://pan.baidu.com/s/1QsTIKnoQsOTCkeYLLTTjTA?pwd=8889 
提取码:8889

测试视频链接:

https://v.youku.com/v_show/id_XNTg0NzI4NTkwOA==.html

 

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