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ATLib is a C# library that makes it easy to communicate with modems.
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ATLib is a C# AT command library that abstracts away the commands and makes it easy to communicate with modems.
Hayes command set (commonly known as AT commands) is a command set frequently used in modems. Read more about it atWikipedia.
Feedback is very much welcome and please request features 🙂
- Send SMS in PDU format (GSM 7 bit or UCS2 encoding)
- Send concatenated SMS (message that spans over multiple SMSs) in PDU format (GSM 7 bit or UCS2 encoding)
- SMS supports emojies
- List SMSs
- Read SMS (PDU format (GSM 7 bit or UCS2 encoding))
- Delete SMS
- Get SMS Status Report (delivery status)
- Dial number
- Answer incoming call
- Hang up call
- Get SIM status
- Enter SIM PIN
- Get remaining PIN & PUK attempts
- Get product information
- Get battery status
- Get signal strength
- Get / set date and time
- Disable echo
- Send USSD code
- Get / set character set
- Get IMSI
- Some modems may also support modem specific commands
- Incoming call
- Missed call
- Call started
- Call ended
- SMS received
- SMS Status Report received
- Error received
- USSD response received
- Generic event
- Adafruit FONA 3G (based on SIMCOM SIM5320 chipset)
- D-Link DWM-222 (based on Qualcomm MDM9225 chipset)
- TP-LINK MA260 (based on a Qualcomm chipset)
- Cinterion MC55i
- Other modems may work using one of the implementations above. You can add your own implementation using the existing functionality as base.
- Debug functionality that lets you intercept incoming and outgoing data
Install as NuGet package
dotnet add package HeboTech.ATLib
Using a serial port to communicate with a modem is easy:
usingHeboTech.ATLib.Messaging;usingHeboTech.ATLib.Misc;usingHeboTech.ATLib.Modems;usingHeboTech.ATLib.Modems.Adafruit;usingHeboTech.ATLib.Numbering;usingHeboTech.ATLib.Parsing;usingSystem;usingSystem.IO.Ports;usingSystem.Threading.Tasks;namespaceHeboTech.ATLib.TestConsole{publicclassGetStartedExample{publicstaticasyncTaskRunAsync(stringportName,intbaudRate,stringpin,stringrecepientPhoneNumber){// Set up serial portusingSerialPortserialPort=newSerialPort(portName,baudRate,Parity.None,8,StopBits.One){Handshake=Handshake.RequestToSend};serialPort.Open();// Create AT channelusingAtChannelatChannel=AtChannel.Create(serialPort.BaseStream);// Create the modemusingIModemmodem=newFona3G(atChannel);// Listen to incoming SMSsmodem.SmsReceived+=(sender,args)=>{Console.WriteLine($"SMS received:{args.SmsDeliver}");};// Listen to incoming SMSs stored in memorymodem.SmsStorageReferenceReceived+=(sender,args)=>{Console.WriteLine($"SMS received. Index{args.Index} at storage location{args.Storage}");};// Open AT channelatChannel.Open();// Configure modem with required settings before PINvarrequiredSettingsBeforePin=awaitmodem.SetRequiredSettingsBeforePinAsync();// Get SIM statusvarsimStatus=awaitmodem.GetSimStatusAsync();Console.WriteLine($"SIM Status:{simStatus}");// Check if SIM needs PINif(simStatus.Result==SimStatus.SIM_PIN){varsimPinStatus=awaitmodem.EnterSimPinAsync(newPersonalIdentificationNumber(pin));Console.WriteLine($"SIM PIN Status:{simPinStatus}");}// Configure modem with required settings after PINvarrequiredSettingsAfterPin=awaitmodem.SetRequiredSettingsAfterPinAsync();// Read SMS at index 1varsms=awaitmodem.ReadSmsAsync(1);if(sms.Success)Console.WriteLine(sms.Result);// Send SMS to the specified numberPhoneNumberphoneNumber=PhoneNumberFactory.CreateCommonIsdn(recepientPhoneNumber);stringmessage="Hello ATLib!";varsmsReferences=awaitmodem.SendSmsAsync(newSmsSubmitRequest(phoneNumber,message));foreach(varsmsReferenceinsmsReferences)Console.WriteLine($"SMS Reference:{smsReference}");}}}
Because it relies on a stream, you can even control a modem over a network! Either use a network attached modem, or forward a modem serial port to a network port.
For more examples, check out the TestConsole project in the code.
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ATLib is a C# library that makes it easy to communicate with modems.
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