我有这个arduino代码。 GSM屏蔽连接,ussd也被发送,但我没有得到任何回复(类似于' ok')。 ussd短代码是有效的。我在这里错过了什么?或者我的代码中是否有错误? (设备:Arduino Uno,GSM支持)
欣赏有关此事的任何见解。谢谢
#include <GSM.h>
#include <GSM3ShieldV1DirectModemProvider.h>
// initialize the library instance
GSM gsmAccess;
GSM3ShieldV1DirectModemProvider modemAccess;
// PIN Number
#define PINNUMBER ""
void setup() {
Serial.begin(9600);
// initialize the digital pin as an output.
Serial.println("GSM networks scanner");
connectGSM();
String At_COMMAND = "AT+CUSD=1,\"*#456#\"";
Serial.println("Sending At command");
String reply = modemAccess.writeModemCommand(At_COMMAND,15);
Serial.println("Sent");
Serial.println(reply);
Serial.println("Sent");
}
void connectGSM(){
boolean notConnected=true;
Serial.println("Connecting...");
while(notConnected){
if(gsmAccess.begin(PINNUMBER) == GSM_READY)
notConnected = false;
else delay(1000);
}
Serial.println("Connected to GSM");
}
输出
GSM networks scanner
Connecting...
Connected to GSM
Sending At command
Sent
Sent
答案 0 :(得分:0)
尝试将时间增加到1000毫秒而不是15毫秒