C:\Users\conservator\AppData\Local\Arduino15\packages\esp8266\hardware\esp8266\3.1.2\cores\esp8266/Print.h:93:16: note: conversion of argument 1 would be ill-formed: C:\Users\conservator\Desktop\mqttToAliyun\mqttToAliyun.ino:128:18: error: invalid conversion from 'const char*' to 'long long int' [-fpermissive] 128 | Serial.print("%d",sensor[0]); | ^~~~ | | | const char* In file included from C:\Users\conservator\AppData\Local\Arduino15\packages\esp8266\hardware\esp8266\3.1.2\cores\esp8266/Stream.h:27, from C:\Users\conservator\AppData\Local\Arduino15\packages\esp8266\hardware\esp8266\3.1.2\cores\esp8266/HardwareSerial.h:32, from C:\Users\conservator\AppData\Local\Arduino15\packages\esp8266\hardware\esp8266\3.1.2\cores\esp8266/Arduino.h:303, from C:\Users\conservator\AppData\Local\Temp\arduino\sketches\304EB848CF381B8A7A8E84D646752A81\sketch\mqttToAliyun.ino.cpp:1: C:\Users\conservator\AppData\Local\Arduino15\packages\esp8266\hardware\esp8266\3.1.2\cores\esp8266/Print.h:94:16: note: candidate: 'size_t Print::print(long long unsigned int, int)' (near match) 94 | size_t print(unsigned long long, int = DEC); | ^~~~~ C:\Users\conservator\AppData\Local\Arduino15\packages\esp8266\hardware\esp8266\3.1.2\cores\esp8266/Print.h:94:16: note: conversion of argument 1 would be ill-formed: C:\Users\conservator\Desktop\mqttToAliyun\mqttToAliyun.ino:128:18: error: invalid conversion from 'const char*' to 'long long unsigned int' [-fpermissive] 128 | Serial.print("%d",sensor[0]); | ^~~~ | | | const char* exit status 1 Compilation error: no matching function for call to 'print(const char [3], int&)'

这个错误是因为 `Serial.print()` 函数的参数传递方式不正确。`print()` 函数的第一个参数应该是一个字符串，而你传递了一个格式化字符串。在 Arduino 中，你可以使用 `%d` 来打印整数值，但是在这里你需要使用 `Serial.print()` 函数的两个参数版本来打印传感器值。

以下是修正后的代码示例：

Serial.print("Sensor Value: ");
Serial.println(sensor[0]);

这样就可以正确打印传感器值了。记得在修改完代码后重新编译和上传到你的硬件设备上。

相关问题

C:\Users\conservator\Desktop\mqttToAliyun\mqttToAliyun.ino: In function 'void get_value()': C:\Users\conservator\Desktop\mqttToAliyun\mqttToAliyun.ino:128:34: error: no matching function for call to 'println(const char [3], int&)' 128 | Serial.println("%d",sensor[0]); | ^ In file included from C:\Users\conservator\AppData\Local\Arduino15\packages\esp8266\hardware\esp8266\3.1.2\cores\esp8266/Stream.h:27, from C:\Users\conservator\AppData\Local\Arduino15\packages\esp8266\hardware\esp8266\3.1.2\cores\esp8266/HardwareSerial.h:32, from C:\Users\conservator\AppData\Local\Arduino15\packages\esp8266\hardware\esp8266\3.1.2\cores\esp8266/Arduino.h:303, from C:\Users\conservator\AppData\Local\Temp\arduino\sketches\304EB848CF381B8A7A8E84D646752A81\sketch\mqttToAliyun.ino.cpp:1: C:\Users\conservator\AppData\Local\Arduino15\packages\esp8266\hardware\esp8266\3.1.2\cores\esp8266/Print.h:102:16: note: candidate: 'size_t Print::println(unsigned char, int)' (near match) 102 | size_t println(unsigned char, int = DEC); | ^~~~~~~ C:\Users\conservator\AppData\Local\Arduino15\packages\esp8266\hardware\esp8266\3.1.2\cores\esp8266/Print.h:102:16: note: conversion of argument 1 would be ill-formed: C:\Users\conservator\Desktop\mqttToAliyun\mqttToAliyun.ino:128:20: error: invalid conversion from 'const char*' to 'unsigned char' [-fpermissive] 128 | Serial.println("%d",sensor[0]); | ^~~~ | | | const char* In file included from C:\Users\conservator\AppData\Local\Arduino15\packages\esp8266\hardware\esp8266\3.1.2\cores\esp8266/Stream.h:27, from C:\Users\conservator\AppData\Local\Arduino15\packages\esp8266\hardware\esp8266\3.1.2\cores\esp8266/HardwareSerial.h:32, from C:\Users\conservator\AppData\Local\Arduino15\packages\esp8266\hardware\esp8266\3.1.2\cores\esp8266/Arduino.h:303, from C:\Users\conservator\AppData\Local\Temp\arduino\sketches\304EB848CF381B8A7A8E84D646752A81\sketch\mqttToAliyun.ino.cpp:1: C:\Users\conservator\AppData\Local\Arduino15\packages\esp8266\hardware\esp8266\3.1.2\cores\esp8266/Print.h:103:16: note: candidate: 'size_t Print::println(int, int)' (near match) 103 | size_t println(int, int = DEC); | ^~~~~~~ C:\Users\conservator\AppData\Local\Arduino15\packages\esp8266\hardware\esp8266\3.1.2\cores\esp8266/Print.h:103:16: note: conversion of argument 1 would be ill-formed: C:\Users\conservator\Desktop\mqttToAliyun\mqttToAliyun.ino:128:20: error: invalid conversion from 'const char*' to 'int' [-fpermissive] 128 | Serial.println("%d",sensor[0]);

这个错误是因为在你的代码中，`Serial.println()` 函数的参数传递方式不正确。`println()` 函数的第一个参数应该是一个字符串，而你传递了一个格式化字符串。正确的用法是使用 `Serial.print()` 函数来打印格式化字符串。以下是修正后的代码示例：

Serial.print("%d");
Serial.println(sensor[0]);

这样就能正确打印传感器值了。记得在修改完代码后重新编译和上传到你的硬件设备上。

| const char* In file included from C:\Users\conservator\AppData\Local\Arduino15\packages\esp8266\hardware\esp8266\3.1.2\cores\esp8266/Stream.h:27, from C:\Users\conservator\AppData\Local\Arduino15\packages\esp8266\hardware\esp8266\3.1.2\cores\esp8266/HardwareSerial.h:32, from C:\Users\conservator\AppData\Local\Arduino15\packages\esp8266\hardware\esp8266\3.1.2\cores\esp8266/Arduino.h:303, from C:\Users\conservator\AppData\Local\Temp\arduino\sketches\304EB848CF381B8A7A8E84D646752A81\sketch\mqttToAliyun.ino.cpp:1: C:\Users\conservator\AppData\Local\Arduino15\packages\esp8266\hardware\esp8266\3.1.2\cores\esp8266/Print.h:105:16: note: candidate: 'size_t Print::println(long int, int)' (near match) 105 | size_t println(long, int = DEC); | ^~~~~~~ C:\Users\conservator\AppData\Local\Arduino15\packages\esp8266\hardware\esp8266\3.1.2\cores\esp8266/Print.h:105:16: note: conversion of argument 1 would be ill-formed: C:\Users\conservator\Desktop\mqttToAliyun\mqttToAliyun.ino:130:24: error: invalid conversion from 'const char*' to 'long int' [-fpermissive] 130 | Serial.println("%d",sensor[2]);

这个错误是因为在第130行中，你尝试将一个 `const char*` 类型的字符串传递给 `println` 函数，而 `println` 函数的参数应该是一个 `long int` 类型的整数。这样的类型不匹配导致了编译错误。

要解决这个问题，你需要将传递给 `println` 函数的参数转换为 `long int` 类型。你可以使用 `atol` 函数将字符串转换为长整数，然后再传递给 `println` 函数。下面是一个可能的解决方法：

Serial.println(atol(sensor[2]));

这样，`atol` 函数将 `sensor[2]` 字符串转换为长整数，然后将其传递给 `println` 函数。请确保在使用 `atol` 函数之前，你已经包含了 `<cstdlib>` 头文件。