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tcp - Arduino UNO 和调制解调器 Sim800L 无法编写设置命令将数据发送到服务器

问题描述

我正在使用带有调制解调器 sim800l 的 arduino UNO 板。我想用它向服务器发送数据，但问题是我无法编写设置命令。

我究竟做错了什么？这不是用于 sim800l 的正确命令吗？我试过不同的命令，输出是一样的。

#include <SoftwareSerial.h>

//Create software serial object to communicate with SIM800L
SoftwareSerial mySerial(3, 2); //SIM800L Tx & Rx is connected to Arduino #3 & #2

void setup()
{
  //Begin serial communication with Arduino and Arduino IDE (Serial Monitor)
  Serial.begin(9600);

  //Begin serial communication with Arduino and SIM800L
  mySerial.begin(9600);

  Serial.println("Initializing..."); 
  delay(100);
  delay(1000);

  mySerial.println("AT+CMEE=2"); // Error mode 
  delay(100);
  updateSerial();

  mySerial.println("AT"); //Once the handshake test is successful, i t will back to OK
  delay(100);
  updateSerial();

  mySerial.println("AT+CFUN=1"); //Level "full functionality" 
  delay(100);
  updateSerial();

  mySerial.println("AT+CGATT?"); //attach or detach from GPRS service 
  delay(100);
  updateSerial();

  mySerial.println("AT+CSTT=\"net\",\"\",\"\""); //AT+CSTT AT command sets up the apn, user name and password for the PDP context.
  delay(2000);
  updateSerial();

  mySerial.println("AT+CSTT?"); //AT+CSTT show apn
  delay(2000);
  updateSerial();

  mySerial.println("AT+CIICR"); //  Brings up wireless connection
  delay(2000);
  updateSerial();

  mySerial.println("AT+CIFSR"); //  Get local IP address if connected
  delay(2000);
  updateSerial();
}

这是 Arduino IDE 控制台的输出：

Initializing... 
AT+CHEE=2 
OK 
AT 
OK 
AT+CFUN=1 
OK 
AT+CGAIT? 
+CGATT: 1 
OK 
AT+CSTT="net","","" 
+CME ERROR: operation not allowed 
AT+CSTT? 
+CSTT: "CMNET","","" 

OK 
AT+CIICR 
+CME ERROR: operation not allowed 
AT+CIFSR 
+CME ERROR: operation not allowed

标签： tcparduinogsmsim800sim800l

解决方案

设置 TCP/IP 连接的发送命令序列：

//Check the registration status
AT+CREG?

//Check attach status
AT+CGACT?

//Attach to the network
AT+CGATT=1

//Wait for Attach
WAIT=7

//Start task ans set the APN. Check your carrier APN
AT+CSTT="bluevia.movistar.es" // Here you havve net which I guess is not a NetworkAPN you have to use the APN from your provider (= sim card)

//Bring up the wireless connection
AT+CIICR

//Wait for bringup
WAIT=6

//Get the local IP address
AT+CIFSR

//Start a TCP connection to remote address. Port 80 is TCP.
AT+CIPSTART="TCP","74.124.194.252","80"

//Set prompt of '>' when module sends data
AT+CIPSPRT=1

//Send the TCP data
AT+CIPSEND

如果您想快速测试稳定的设置，请使用这个7 天免费使用 SIM800、SIM900 的工具，然后将成功的过程复制到代码中。

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