一、网上找到最便宜的板子

https://item.taobao.com/item.htm?spm=a1z09.2.0.0.2c802e8dP0EmQg&id=648413912304&_u=i1sscgpi56c8
13.8包邮

二、获取资料

1. 可以选择TB详情页上给的库，也可以拿nulllab的库
   地址：
   https://gitee.com/nulllab/nulllab_arduino

三、开搞

1. 在附加开发板管理器网址输入如下网址
   https://cdn.jsdelivr.net/gh/nulllaborg/arduino_nulllab/package_nulllab_boards_index_zh.json
2. 开发板选DLY BOARD
3. 配置如下：
   注意点：
   时钟必须是16M，否则定时都不准
   必须采用内部32M
   EEPROM必须选择 有 ，大小随意，不然会编译报错
   上传波特率不能是115200，可能这颗USB转TTL不太行

Clock Source：Internal 32M
Frequency： 16M
Variant：LGT328P-LQFP32
EEPROM SIZE：2KB  
Upload Speed：57600

四、简单例子

1. LED闪烁，具体引脚可以看C:\Users\321\AppData\Local\Arduino15\packages\nulllab avr compatible boards\hardware\avr\2.0.0\variants\standard\pins_arduino.h

   #define LED_BUILTIN 	(13)
   

   INO

   /*
     Blink
   
     Turns an LED on for one second, then off for one second, repeatedly.
   
     Most Arduinos have an on-board LED you can control. On the UNO, MEGA and ZERO
     it is attached to digital pin 13, on MKR1000 on pin 6. LED_BUILTIN is set to
     the correct LED pin independent of which board is used.
     If you want to know what pin the on-board LED is connected to on your Arduino
     model, check the Technical Specs of your board at:
     https://www.arduino.cc/en/Main/Products
   
     modified 8 May 2014
     by Scott Fitzgerald
     modified 2 Sep 2016
     by Arturo Guadalupi
     modified 8 Sep 2016
     by Colby Newman
   
     This example code is in the public domain.
   
     https://www.arduino.cc/en/Tutorial/BuiltInExamples/Blink
   */
   
   // the setup function runs once when you press reset or power the board
   void setup() {
     // initialize digital pin LED_BUILTIN as an output.
     pinMode(LED_BUILTIN, OUTPUT);
   }
   
   // the loop function runs over and over again forever
   void loop() {
     digitalWrite(LED_BUILTIN, HIGH);   // turn the LED on (HIGH is the voltage level)
     delay(1000);                       // wait for a second
     digitalWrite(LED_BUILTIN, LOW);    // turn the LED off by making the voltage LOW
     delay(1000);                       // wait for a second
   }
   

2. 模拟串口

   /*
     Software serial multple serial test
    
    Receives from the hardware serial, sends to software serial.
    Receives from software serial, sends to hardware serial.
    
    The circuit: 
    * RX is digital pin 10 (connect to TX of other device)
    * TX is digital pin 11 (connect to RX of other device)
    
    Note:
    Not all pins on the Mega and Mega 2560 support change interrupts, 
    so only the following can be used for RX: 
    10, 11, 12, 13, 50, 51, 52, 53, 62, 63, 64, 65, 66, 67, 68, 69
    
    Not all pins on the Leonardo support change interrupts, 
    so only the following can be used for RX: 
    8, 9, 10, 11, 14 (MISO), 15 (SCK), 16 (MOSI).
    
    created back in the mists of time
    modified 25 May 2012
    by Tom Igoe
    based on Mikal Hart's example
    
    This example code is in the public domain.
    
    */
   #include <SoftwareSerial.h>
   
   SoftwareSerial mySerial(10, 11); // RX, TX
   
   void setup()  
   {
     // Open serial communications and wait for port to open:
     Serial.begin(57600);
     while (!Serial) {
       ; // wait for serial port to connect. Needed for Leonardo only
     }
   
   
     Serial.println("Goodnight moon!");
   
     // set the data rate for the SoftwareSerial port
     mySerial.begin(57600);
     mySerial.println("Hello, world?");
   }
   
   void loop() // run over and over
   {
     if (mySerial.available())
       Serial.write(mySerial.read());
     if (Serial.available())
       mySerial.write(Serial.read());
   }