材料清单：

• Beetle ESP32-C3
• 模拟pH计V2
• OLED透明屏幕
• RGB 全彩灯带
• 3.7V电池
• 外壳

硬件组装：

安装电源开关

用电磨机给外壳开孔

固定pH计的信号转接板

用塑料片固定透明屏

连接透明屏转接板

焊接且固定C3的扩展板

插上C3

连接3.7V电池

打孔安装灯带

额。。。翻车了，3颗坏2颗（南瘦）

算了，还是重新设计一下吧，绘制图纸

用激光切割亚克力板

在反面切割开孔并安装亚克力板
使用切割工具须小心注意安全

将前盖与后盖组合起来

在外壳正面贴上黑色贴纸

连接上pH计探头

到此你便得到了一个精雕细刻、流光溢彩、妙不可言的pH计!

最后有一说一柠檬真的很酸！

实用工具推荐
钩式测试夹
在pH计的制作过程中非常实用的工具，在测试与焊接前使用钩式测试夹，直接钩住焊孔，连接稳定解放双手；彩色的设计更容易区分电路。

程序

#include <Arduino.h>
#include <U8g2lib.h>
#include <SPI.h>#if defined ARDUINO_SAM_ZERO
#define OLED_DC  7
#define OLED_CS  5
#define OLED_RST 6
/*ESP32 */
#elif defined(ESP32)
#define OLED_DC  1
#define OLED_CS  7
#define OLED_RST 6
/*ESP8266*/
#elif defined(ESP8266)
#define OLED_DC  D4
#define OLED_CS  D6
#define OLED_RST D5
/*AVR series board*/
#else
#define OLED_DC  2
#define OLED_CS  3
#define OLED_RST 4
#endif
U8G2_SSD1309_128X64_NONAME2_1_4W_HW_SPI u8g2(/* rotation=*/U8G2_R0, /* cs=*/ OLED_CS, /* dc=*/ OLED_DC,/* reset=*/OLED_RST);
const uint8_t col[] U8X8_PROGMEM= {0x00,0x00,0x1F,0x0E,0x04}; #include "DFRobot_PH.h"
#include <EEPROM.h>#define PH_PIN A0
float voltage,voltage1,phValue,temperature = 25;
float acidVoltage = 2032.44;
float neutralVoltage = 1500.0;
int w;
int qw;float  w0,w1,w2,w3,w4,w5,w6,w7,w8;int p;float randNumber;//随机数DFRobot_PH ph;void setup(){Serial.begin(115200);ph.begin();u8g2.begin();u8g2.setFontPosTop();}void loop(){static unsigned long timepoint = millis();if(millis()-timepoint>1000U){                  //time interval: 1stimepoint = millis();//temperature = readTemperature();         // read your temperature sensor to execute temperature compensationvoltage = analogRead(PH_PIN)/4096.0*2900;  // read the voltage//  voltage = analogRead(PH_PIN)/1024.0*5000;phValue = ph.readPH(voltage,temperature);  // convert voltage to pH with temperature compensationSerial.print("temperature:");Serial.print(temperature,1);Serial.print("^C  pH:");Serial.print(phValue,2);//voltage1=voltage-1500.00;
voltage1=voltage*0.001;Serial.print("  voltage:");Serial.print(voltage1);Serial.println("mV");}ph.calibration(voltage,temperature);           // calibration process by Serail CMDw=map(phValue, 0, 15, 5, 99);qw=map(phValue, 0, 15, 2, 39);w8=w7;
w7=w6;
w6=w5;
w5=w4;w4=w3;w3=w2;w2=w1;w1=w0;w0=qw;u8g2.firstPage();   do{u8g2.drawLine(5, 54, 104, 54);u8g2.drawLine(50, 0, 50, 40);u8g2.drawLine(50, 40, 120, 40);//u8g2.clearBuffer();        u8g2.setFont(u8g2_font_t0_11b_tr  );  u8g2.drawStr(5,55,"0");  u8g2.drawStr(50,55,"7");u8g2.drawStr(95,55,"14");//  u8g2.drawStr(w,50,"^");
u8g2.drawXBMP( /* x=*/w , /* y=*/49 , /* width=*/5 , /* height=*/5 , col );u8g2.drawLine(58, w7, 50, w8);
u8g2.drawLine(66, w6, 58, w7);
u8g2.drawLine(74, w5, 66, w6);
u8g2.drawLine(82, w4, 74, w5);u8g2.drawLine(90, w3, 82, w4);
u8g2.drawLine(98, w2, 90, w3);
u8g2.drawLine(106, w1, 98, w2);
u8g2.drawLine(114, w0, 106, w1);u8g2.setFont(u8g2_font_HelvetiPixelOutline_tr);u8g2.setCursor(/* x=*/1, /* y=*/10);    //Define the cursor of print function, any output of the print function will start at this position.u8g2.print(phValue);u8g2.sendBuffer();          } while( u8g2.nextPage() );// delay(1000);}float readTemperature(){//add your code here to get the temperature from your temperature sensor}