at-command

问题 I'm building a windows service to read SMS from 3G dongle storage set as SIM card using AT commands. It's working good but some times it fails and response shows +CPMS: 0,0,0,0,0,0 . Code gsmPort.WriteLine("AT+CMGF=1"); //Set mode to Text(1) or PDU(0) gsmPort.WriteLine("AT+CPMS=\"SM\""); //Set storage to SIM(SM), MODEM(ME), BOTH(MT) gsmPort.WriteLine("AT+CMGL=\"ALL\""); //What catagory to read ALL, REC READ, or REC UNREAD response = gsmPort.ReadExisting(); When i move dongle into another port

问题 Pretty much every phone that has bluetooth (so pretty much every phone) has an AT command interface for controlling the phone. Some base commands are universal due to the fact theat they precede the cellular phones (ATDT, ATA, ATZ, etc). But there are many AT commands implmented specifcally to control or query cellular connection specific data. Are these commands at least somewhat standardized? If so, how? UMTS vs EVDO, Manufacture, etc.. 回答1: There is a 3GPP standard for AT commands: http:/

问题 Three days ago I started making a simple app to send SMS. I already tested it and it works in GSM CSCS mode, but when I switch it to UCS2 it doesn't show the Cyrillic letters <?php error_reporting(E_ALL); $fp = fopen("/dev/ttyUSB0", 'w+'); $msg = strtoupper(bin2hex(mb_convert_encoding("Тест", "UCS-2", "UTF-8"))); $number_raw = "+359000000000"; $number = bin2hex(mb_convert_encoding($number_raw, "UCS-2", "UTF-8")); echo $number."<br>"; echo $msg; $debug = false; if(!$fp || $debug){ //echo "Can

问题 I want to print the response to AT command. I'm sending AT command but I'm not getting any response in the Arduino serial port. It's giving -1 instead of OK. #include "SoftwareSerial.h" String ssid = "connectify-krish"; String password = "12345678"; String myword= ""; SoftwareSerial esp(10, 11); void setup() { Serial.begin(9600); esp.begin(9600); esp.write("AT"); Serial.println(esp.read()); } void loop() {} 回答1: As already pointed out in the comments you are not terminating the AT command

问题 I am currently working on a project that involves automating sending and receiving text messages using a RAZR v3. Usually, when choosing the memory for the phone, there is "ME", "SM",or "MT" which stands for phone, sim, and both respectively. However when inserting a specific sim card, its different. When I do a AT+CPMS=?, I get ("MT","IM","OM","BM","DM"), ("OM","DM"),("IM") I know what MT is, and BM is for broadcast messages. What does "OM" and "DM" stand for and what are their relations to

问题 I'm trying to send SMS via PHP using AT commands via USB modem. I can send SMS from PHP server to specific phone numbers. But the problem is, when I'm sending some text to a phone, I'm also getting at commands that I have used to send the SMS. server.php $fp = fopen('COM4', 'r+'); $writtenBytes = fputs($fp, "AT\r\n"); $writtenBytes = fputs($fp, "AT+CMGF=1\r\n"); $writtenBytes = fputs($fp, "WAIT=1\r\n"); $writtenBytes = fputs($fp, "AT+CSCS=\"GSM\"\n\r"); $writtenBytes = fputs($fp, "WAIT=1\r\n"

问题 I have a problem with AT command for sending SMS - AT+CMGS . After sending AT+CMGS=<length of PDU datagram><CR> I wait for response of modem. After reading <CR><LF>><Space> I send <PDU datagram><CTRL-Z> but I don't get any answer from modem. If I send any command after that the response to that command is +CMGS=<reference number> which is exactly the response which I expected later. But if I wait for about 100ms after reading <CR><LF>><Space> and than send PDU datagram than everything works

问题 I'm writing a program that is able to send and receive data from the GSM modem in my Android phone with AT commands. I execute the following shell script: su echo -e "AT+CSQ?\r" > /dev/smd0 cat /dev/smd0 > /dev/asd.txt The asd.txt file is created, however there is nothing in it (it should write out the signal strength). It looks like it hangs at the cat command, I think because it doesn't get any output. I've tried some other commands, but I had no luck so far. Can you recommend anything? 回答1

问题 I'm having trouble to send data to my database with the ESP8266-01. I'm getting the correct data from the sensor in the Console but nothing in my Database. The PHP Script is correct, I know that, just to be sure, I'm gonna add it in here too. My Code: // http://playground.arduino.cc/Main/Average #include <Average.h> #include <SoftwareSerial.h> char serialbuffer[100];//serial buffer for request url SoftwareSerial mySerial(10, 11); const char* ssid = "Master"; const char* password = "#Bennet99*

问题 I want to check balance of sim card via AT command . Everything is running fine. But i am not able to enter in menu of response. When i am trying to enter in it Its giving me "invalid request" error from operator. While in mobile phone its working fine. Checking Selected Port COM11 Data Received - AT+CNMI=1,1 AT OK OK Data Received - AT+CUSD=1,*121# OK Data Received - +CUSD: 2,"My Airtel App:Track your daily data usage, balance, validity and Recharge online. Download now from Play Store/ App