modem

问题 I am trying to connect external GSM modem with nexus 5 and send AT command using android RIL layer.I am using android 5.0 AOSP for nexus 5 downloaded from Google source. Error: Permission denied with trying to open ttyACM0 port. i have checked this by changing permissions but still permission denied error. Does there any other permissions do i have to change to open port? 回答1: You are getting permission denied because the Android RIL doesn't have the appropriate selinux(Security Enhanced

问题 I am trying to send at commands to get balance on huawei e3131a modem but i always receive "Ok" as answer no matter the configuration i use (GSM, IRA, UCS2). I also tried to change the operator code ( #123# ) to many formats like Hex PDU Simple String but no way to get the balance. Here is the command i sent : AT+CUSD=1,"#123#",15 . Thanks in advance for the help. NB: I am using Putty to send commands. 回答1: I finally found the method to send USSD At commands. Some 3G Modem doesn't support

问题 I have bought ZTE MF667 GSM Modem and i am using Hyper Terminal to send AT COMMANDS, i have a problem with USSD e.g : AT+CUSD=1,"*111#",15 (to check balance) but it returns only OK AT+CUSD=1,"*111#" returns only OK I have tested another AT COMMADS which work fine like AT+CMGL="ALL" to read SMS (WORKS) How could i resolve the problem please ? 回答1: First of all USSD messages are fairly similar to SMS in that a message is sent from the mobile device to the operator network. This means when you

问题 I have bought a ZTE MF190 usb modem and began to harness it. So far, I have managed to programmatically have an sms sent to another mobile equipement using free AsyncPro components of TurboPowers . I wonder wether there is a way to retrieve the list of all installed modems along with their attached serial COM ports (hopefully with other valuable capabilities). Thanks in advance. 回答1: To list the installed modems you can use the Win32_POTSModem WMI class Check this sample code. {$APPTYPE

问题 I would like to know if someone knows why I can't send sms with my E226 3g modem. I have configured the example class, I setted modem model, PIN and Smsc number. public class SendMessage { public void doIt() throws Exception { OutboundNotification outboundNotification = new OutboundNotification(); System.out.println("Example: Send message from a serial gsm modem."); System.out.println(Library.getLibraryDescription()); System.out.println("Version: " + Library.getLibraryVersion());

问题 I use HUAWEI USB stick modem and code below to send SMS successfully but under 140 of length (see the code pls -- double lenMes = textsms.Length / 2; ). But nowdays I see the really big SMS messages. So I am wondering what's wrong with AT commnds or may me hardware is old so I cannot send big SMS. Please any clue? using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.Threading.Tasks; using System.IO.Ports; namespace sendSMSPDU { class Program {

问题 I want to create a simple code that detects the caller ID only of an incoming call. Can I use any modem, and implement the right code? Or do I have to buy a modem that supports caller id? How can I tell if a modem supports caller id? Im asking this question because I have tried so many times to make this work, and I never found any script that worked, then I found a post that said a caller id modem is needed. Thank you in advance 回答1: You should be able to use the AT#CID=1 command on most

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 have to fetch the info related to following Telephony parameters: BCCH, Band, DL ARFCN,UL ARFCN, BLER, MOS DL, MOS UL, Txpwr & Handover Parameters. I searched a lot but didn't find any way to get this information through APIs. There may be some other ways (I am not sure), like: Using AT command. Using AIDL, talk to RIL & fetch the info. Using NDK, write c code which will directly talk to modem/low level implementation. But I don't know which is the right way or how to proceed with the right

问题 package pack1; import java.io.*; import java.util.*; import javax.comm.*; public class Java_SerialCommTest1 implements Runnable, SerialPortEventListener { public void run() {} static Enumeration portList; static CommPortIdentifier portId; static String messageString = "My Message to be sent"; static char ch = '"'; static String dest = "*********"; // 10 Digit Mobile Number. static InputStream inputStream; static SerialPort serialPort; static OutputStream outputStream; public void serialEvent