原来是这样 啊，，明白了

楼主的程序计算出的容量应该是AS（安秒），这一句“capacity=capacity+Idown;  //换算为电池容量值”改为
   “capacity=capacity+Idown/3.6;  //换算为电池容量值” 单位才能用mAh.   

252622979 发表于 2020-2-4 13:20
DUE 好像不行的哦，

原来是这样 啊，，明白了

252622979 发表于 2020-2-4 13:20
DUE 好像不行的哦，

要什么板？？

cr8526 发表于 2019-10-15 15:10
我用Arduino DUE板做的，，做不出来，，上面就是错误报警

DUE 好像不行的哦，

图1  Arduino Pro Mini 测量 2 节 7 号电池电压和容量


图2  硬件连接 Arduino Pro Mini 和 电池



图3  APP 实时显示电池电压和容量





谢谢您的介绍，按这个原理实现了 Arduino Pro Mini 测量 2 节 7 号电池（电压=2.93V，电量=94%)。算法原理和实验过程，请参考《花 1 小时，开源设计 LoRa 检测电池容量》  https://blog.csdn.net/jiangjunjie_2005/article/details/104070668

zhengyouhua 发表于 2019-10-15 18:30
加个显示屏  显示呢

论坛有的，，我看到有显示屏的做法

加个显示屏  显示呢

我用Arduino DUE板做的，，做不出来，，上面就是错误报警

Arduino:1.6.9 (Windows 7), 开发板："Arduino Due (Programming Port)"

Arduino:1: error: 'float time' redeclared as different kind of symbol

In file included from c:\users\administrator.user-20161022ou\appdata\local\arduino15\packages\arduino\tools\arm-none-eabi-gcc\4.8.3-2014q1\arm-none-eabi\include\stdlib.h:11:0,

                 from C:\Users\Administrator.USER-20161022OU\AppData\Local\Arduino15\packages\arduino\hardware\sam\1.6.8\cores\arduino/Arduino.h:24,

                 from sketch\Arduino.ino.cpp:1:

c:\users\administrator.user-20161022ou\appdata\local\arduino15\packages\arduino\tools\arm-none-eabi-gcc\4.8.3-2014q1\arm-none-eabi\include\time.h:47:11: error: previous declaration of 'time_t time(time_t*)'

time_t    _EXFUN(time,     (time_t *_timer));

           ^

D:\360娴忚�堝櫒涓嬭浇LBV\绗�浜旂珷搴旂敤杩涢樁\5.4娓╂箍搴︽祴閲廫Arduino\Arduino.ino: In function 'void loop()':

D:\360娴忚�堝櫒涓嬭浇LBV\绗�浜旂珷搴旂敤杩涢樁\5.4娓╂箍搴︽祴閲廫Arduino\Arduino.ino:9:11: warning: pointer to a function used in arithmetic [-Wpointer-arith]

Arduino:9: error: assignment of function 'time_t time(time_t*)'

Arduino:9: error: cannot convert 'time_t (*)(time_t*) {aka long int (*)(long int*)}' to 'time_t(time_t*) {aka long int(long int*)}' in assignment

Arduino:24: error: call of overloaded 'print(time_t (&)(time_t*))' is ambiguous

D:\360娴忚�堝櫒涓嬭浇LBV\绗�浜旂珷搴旂敤杩涢樁\5.4娓╂箍搴︽祴閲廫Arduino\Arduino.ino:24:18: note: candidates are:

In file included from C:\Users\Administrator.USER-20161022OU\AppData\Local\Arduino15\packages\arduino\hardware\sam\1.6.8\cores\arduino/Stream.h:26:0,

                 from C:\Users\Administrator.USER-20161022OU\AppData\Local\Arduino15\packages\arduino\hardware\sam\1.6.8\cores\arduino/HardwareSerial.h:24,

                 from C:\Users\Administrator.USER-20161022OU\AppData\Local\Arduino15\packages\arduino\hardware\sam\1.6.8\cores\arduino/Arduino.h:195,

                 from sketch\Arduino.ino.cpp:1:

C:\Users\Administrator.USER-20161022OU\AppData\Local\Arduino15\packages\arduino\hardware\sam\1.6.8\cores\arduino/Print.h:61:12: note: size_t Print::print(char) <near match>

     size_t print(char);

            ^

C:\Users\Administrator.USER-20161022OU\AppData\Local\Arduino15\packages\arduino\hardware\sam\1.6.8\cores\arduino/Print.h:61:12: note:   no known conversion for argument 1 from 'time_t(time_t*) {aka long int(long int*)}' to 'char'

C:\Users\Administrator.USER-20161022OU\AppData\Local\Arduino15\packages\arduino\hardware\sam\1.6.8\cores\arduino/Print.h:62:12: note: size_t Print::print(unsigned char, int) <near match>

     size_t print(unsigned char, int = DEC);

            ^

C:\Users\Administrator.USER-20161022OU\AppData\Local\Arduino15\packages\arduino\hardware\sam\1.6.8\cores\arduino/Print.h:62:12: note:   no known conversion for argument 1 from 'time_t(time_t*) {aka long int(long int*)}' to 'unsigned char'

C:\Users\Administrator.USER-20161022OU\AppData\Local\Arduino15\packages\arduino\hardware\sam\1.6.8\cores\arduino/Print.h:63:12: note: size_t Print::print(int, int) <near match>

     size_t print(int, int = DEC);

            ^

C:\Users\Administrator.USER-20161022OU\AppData\Local\Arduino15\packages\arduino\hardware\sam\1.6.8\cores\arduino/Print.h:63:12: note:   no known conversion for argument 1 from 'time_t(time_t*) {aka long int(long int*)}' to 'int'

C:\Users\Administrator.USER-20161022OU\AppData\Local\Arduino15\packages\arduino\hardware\sam\1.6.8\cores\arduino/Print.h:64:12: note: size_t Print::print(unsigned int, int) <near match>

     size_t print(unsigned int, int = DEC);

            ^

C:\Users\Administrator.USER-20161022OU\AppData\Local\Arduino15\packages\arduino\hardware\sam\1.6.8\cores\arduino/Print.h:64:12: note:   no known conversion for argument 1 from 'time_t(time_t*) {aka long int(long int*)}' to 'unsigned int'

C:\Users\Administrator.USER-20161022OU\AppData\Local\Arduino15\packages\arduino\hardware\sam\1.6.8\cores\arduino/Print.h:65:12: note: size_t Print::print(long int, int) <near match>

     size_t print(long, int = DEC);

            ^

C:\Users\Administrator.USER-20161022OU\AppData\Local\Arduino15\packages\arduino\hardware\sam\1.6.8\cores\arduino/Print.h:65:12: note:   no known conversion for argument 1 from 'time_t(time_t*) {aka long int(long int*)}' to 'long int'

C:\Users\Administrator.USER-20161022OU\AppData\Local\Arduino15\packages\arduino\hardware\sam\1.6.8\cores\arduino/Print.h:66:12: note: size_t Print::print(long unsigned int, int) <near match>

     size_t print(unsigned long, int = DEC);

            ^

C:\Users\Administrator.USER-20161022OU\AppData\Local\Arduino15\packages\arduino\hardware\sam\1.6.8\cores\arduino/Print.h:66:12: note:   no known conversion for argument 1 from 'time_t(time_t*) {aka long int(long int*)}' to 'long unsigned int'

exit status 1
'float time' redeclared as different kind of symbol

在文件 -> 首选项开启
“编译过程中显示详细输出”选项
这份报告会包含更多信息。