c - Arduino Error all of overloaded ‘println(long unsigned int (&)())’ is ambiguous 错误

Question

这是我的代码

#include<SPI.h>
#include<Ethernet.h>

byte mac[]={0xAA, 0xAB, 0xAC,0xAD, 0xAE, 0xAF};
IPAddress ip(192, 168, 1, 86);
EthernetClient client;
byte server[]={192, 168, 1, 61};

void setup()
{
  Serial.begin(9600);
  delay(1000);
  Ethernet.begin(mac, ip);
}

void loop()
{
  if(client.connect(server, 80))
  {
    client.println("GET /ardunio/ardComm.php?param=ping");
    client.println();
   client.stop();
  }
  Serial.println(millis);
}

这里是错误

Serverping.ino:在函数‘void loop()’中: Serverping.ino:24:24: 错误:重载“println(long unsigned int (&)())”的调用不明确 Serverping.ino:24:24: 注意:候选人是: 在/usr/share/arduino/hardware/arduino/cores/arduino/Stream.h:26:0 包含的文件中， 来自/usr/share/arduino/hardware/arduino/cores/arduino/HardwareSerial.h:28， 来自/usr/share/arduino/hardware/arduino/cores/arduino/Arduino.h:193， 来自/usr/share/arduino/libraries/SPI/SPI.h:15， 来自 Serverping.ino:1: /usr/share/arduino/hardware/arduino/cores/arduino/Print.h:70:12: 注意:size_t Print::println(char) size_t println(字符); ^ /usr/share/arduino/hardware/arduino/cores/arduino/Print.h:70:12:注意:参数 1 没有从“long unsigned int()”到“char”的已知转换 /usr/share/arduino/hardware/arduino/cores/arduino/Print.h:71:12: 注意:size_t Print::println(unsigned char, int) size_t println(unsigned char, int = DEC); ^ /usr/share/arduino/hardware/arduino/cores/arduino/Print.h:71:12:注意:参数 1 没有从“long unsigned int()”到“unsigned char”的已知转换 /usr/share/arduino/hardware/arduino/cores/arduino/Print.h:72:12: 注意:size_t Print::println(int, int) size_t println(int, int = DEC); ^ /usr/share/arduino/hardware/arduino/cores/arduino/Print.h:72:12:注意:参数 1 没有从“long unsigned int()”到“int”的已知转换 /usr/share/arduino/hardware/arduino/cores/arduino/Print.h:73:12: 注意:size_t Print::println(unsigned int, int) size_t println(unsigned int, int = DEC); ^ /usr/share/arduino/hardware/arduino/cores/arduino/Print.h:73:12:注意:参数 1 没有从“long unsigned int()”到“unsigned int”的已知转换 /usr/share/arduino/hardware/arduino/cores/arduino/Print.h:74:12: 注意:size_t Print::println(long int, int) size_t println(long, int = DEC); ^ /usr/share/arduino/hardware/arduino/cores/arduino/Print.h:74:12:注意:参数 1 没有从“long unsigned int()”到“long int”的已知转换 /usr/share/arduino/hardware/arduino/cores/arduino/Print.h:75:12: 注意:size_t Print::println(long unsigned int, int) size_t println(unsigned long, int = DEC); ^ /usr/share/arduino/hardware/arduino/cores/arduino/Print.h:75:12:注意:参数 1 没有从“long unsigned int()”到“long unsigned int”的已知转换

Answer 1

millis 是一个函数。如果你想要调用它的结果，那么你需要调用它。

Serial.println(millis());