at-command

I want to talk to my modem with erlang. It is mounted as /dev/ttyUSB and perfectly understands AT-commands. Can I read and write from the device with the standard file module? How about baudrate, bytesize, parity, RTS/CTS, DSR/DTR and the like? Have you any experiences with tonyg-erlang-serial-1.0? (I am not too convinced of this package as it says in the readme: "This is a port program with erlang driver for serial communication, originally written by Johan Bevemyr in 1996 and sporadically maintained by Tony Garnock-Jones from 2007 onwards." What is the common practice for serial I/O in

I use SIM800l to make calls with arduino UNO with AT commands . By using this library I make calls with gprsTest.callUp(number) function. The problem is that it returns true even the number is wrong or there is no credit. It is clear on this part code from GPRS_Shield_Arduino.cpp library why it is happening. It doesnt check the return of ATDnumberhere; bool GPRS::callUp(char *number) { //char cmd[24]; if(!sim900_check_with_cmd("AT+COLP=1\r\n","OK\r\n",CMD)) { return false; } delay(1000); //HACERR quitar SPRINTF para ahorar memoria ??? //sprintf(cmd,"ATD%s;\r\n", number); //sim900_send_cmd(cmd)

I am trying to make a program to send a sms. I wrote the program but doesn't successfully send the message. My program send an At command to the Port COM in my computer but I do not get a response from my gsm modem. I am using COM terminal (Temp pro...) to send sms with the at command and I am able to send sms. Therefore I don't know why the program can't send a sms. import java.io.*; import java.util.*; import gnu.io.*; public class prawiefinal { static Enumeration portList; static CommPortIdentifier portId; static String messageString = "AT+CMGF=1 \r"; static String messageString2 = "AT+CMGS

I'm a beginner in stackoverflow so I cant add a comment. I saw this page: Read command output inside su process and I tried this answer and it is ok: Process p = Runtime.getRuntime().exec(new String[]{"su", "-c", "system/bin/sh"}); DataOutputStream stdin = new DataOutputStream(p.getOutputStream()); //from here all commands are executed with su permissions stdin.writeBytes("ls /data\n"); // \n executes the command InputStream stdout = p.getInputStream(); byte[] buffer = new byte[BUFF_LEN]; int read; String out = new String(); //read method will wait forever if there is nothing in the stream /

I am sending USSD code on modem through serial port. But always it is giving ERROR in response. AT commands I am sending are: in sequence: serialPort.Write("AT+CMGF=0" + "\r\n"); serialPort.Write("AT+CUSD=1,\"*135#\"" + "\r\n"); when I am configuring message format in first AT command, it is giving 'OK' response. But on sending USSD code, response is always 'ERROR'. Why is it so? pumaikar Don't use \n in end of command, use only \r . Form of CUSD command is: AT+CUSD=1,"*135#",15 . In C# it should be: serialPort.Write("AT+CMGF=0" + "\r"); serialPort.Write("AT+CUSD=1,\"*135#\",15" + "\r");