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我正在使用Arduino来控制SM5100B GSM设备,一切正常,除非我想在收到另一个后发送短信.我明白了,

错误代码:

OK> + CMGS:2 5 OK + CMEERROR:4

我处理上述收到短信的代码:

     #include <SoftwareSerial.h>  //Include the NewSoftSerial library to send serial commands to the cellular module. 
        char inchar;                //Will hold the incoming character from the Serial Port. 
        SoftwareSerial cell(2,3); 
        char mobilenumber[] = "0597010129";
        void setup() { 
        //GSM
        Serial.begin(9600); // opens serial port, sets data rate to 9600 bps
        Serial.println("Initialize GSM module serial port for communication.");                       
        cell.begin(9600); 
        delay(35000); // give time for GSM module to register on network etc. 
        Serial.println("delay off");
        cell.println("AT+CMGF=1"); …