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The implementation is based on the sending and processing of AT commands that are changed exchanged through the asynchronous serial line.
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Communication line parameters:
| Parameter | Default value | Meaning |
|---|
| Device |
|
| Name of communication port. |
| Init command |
ATEO restarts a devicereinitializes a device.
In the case of some GSM modems (e.g. HUAWEI E3372), this command needs to be enhanced to AT&F^CURC=0 so that the modem stops reporting signal levels (RSSI- Radio Signal Strength Indication) by sending spontaneous messages e.g. <CR><LF>^RSSI:28<CR><LF>. |
| Dial command | ATD | AT command used when dialing |
of | a telephone number. |
| Hangup | +++~~~~ATH | AT command to hang up the connection. |
| DTR | Checked | DTR signal is used to hang up connection instead of AT command. |
| Kotva |
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| komunikacna_stanica |
|---|
| komunikacna_stanica |
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Communication station configuration
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| Parameter | Default value | Meaning |
|---|
| YES | Both received and sent data are written to the log file. |
| 0000 | PIN code of SIM card (GSM modem). |
| YES |
Semicolon | A semicolon is inserted at the end of the ATD command. |
| YES | Enable to hang up the incoming call in a defined time. |
| 35 sec | Defines |
a | the duration of an incoming call. |
| 3 sec | Some of the modems do not inform about change of status: "ringing -> received", "ringing -> hung up". In "ringing" status, the flags that |
indicates | indicate ringing are sent. If during the |
set | interval configured by this parameter, the ringing is not indicated, the status automat of the protocol will change its status to "hang up". Zero disables to use this indication. |
| 3 sec | The time after which the outgoing call is terminated. |
| 600 sec | After elapsing of this time, the modem is reinitiated. |
Acknowledgment of Receipt | YES |
It switches receipts | Whether the receipts acknowledgments are enabled when sending SMS messages. |
| +421905303303 | Phone number of the service center for SMS messages.
Slovakia O2: +421 949 909 909
Slovakia Orange: +421 905 303 303
|
Telekom | Slovakia Telecom (T-Mobile): +421 903 333 000 |
| 60 sec | Interval of checking the received messages and receipts in modem. |
| YES | Indicates whether a device sends the answer "OK" after dialing the phone number. |
I/O tag configuration
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I/O tags: Ci, Co, Di , Do, TxtI, TxtO
| Value type | Address | Meaning |
|---|
| Outgoing calls |
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| TxtO | OUTGOINGTELNUM | it sets the phone number of the outgoing call. |
| TxtI | OUTGOINGRESULTNUMBER | The protocol can send multiple requests to dial a phone number at the same time. These requests are saved to the list and they are dialed gradually. In the I/O |
tad| tag, the value of the last dialed number is saved. Together with the I/O tag with OUTGOINGRESULTFLAG address, it informs about |
a | the result of the call. |
| Co | OUTGOINGRINGTIME | It sets the duration of the outgoing call including the dialing. It can be used as a trigger to start dialing. If the phone number cannot be dialed at that time (the value of the I/O tag with the BUSY address is TRUE) |
cannot be dialed at that time| , the values of the required I/O tags |
keep | are stored in a queue and postponed for later processing. |
| Di | OUTGOINGRESULTFLAG | It informs about the result of the call. If the outgoing call has been received, the value is TRUE, otherwise FALSE. |
| Incoming calls |
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| TxtI | INCOMMINGTELNUM | Contains the phone number of an incoming call. |
| Di | INCOMMINGRINGING | It indicates that the incoming call is active. At a given moment the value INCOMMINGTELNUM is not valid yet. |
| Outgoing SMS messages |
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| TxtO | OUTGOINGSMSNUMBER | Sets the phone number to which an SMS message will be sent. |
| TxtO | OUTGOINGSMSID | It keeps the value of |
own | the user-defined unique identifier of the message. This value helps to find out whether the message |
could have been | was sent. It also couples the message receipts with the sent message. |
| TxtO | OUTGOINGSMSBODY | Sets the text of an SMS message. It is a trigger of sending the message, which means that its value must be set as the last. After starting the trigger, the values of all necessary I/O tags are saved into the queue. The SMS message is ready to |
send| be sent. |
| Di | OUTGOINGSMSRESULT | Together with the identifier, which is set in I/O tag with address OUTGOINGSMSRESULTID, it informs about the status of sending the SMS message. |
| TxtI | OUTGOINGSMSRESULTID | If there are multiple SMS messages in the queue, |
there | it is necessary to inform about the status of each SMS message, together with the identifier, which is set in the I/O tag |
with address, to inform about the status of each SMS message| with OUTGOINGSMSID address. |
| Incoming SMS messages |
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| Txti | INCOMMINGSMSNUMBER | It contains the phone number of the received SMS message. |
| Txti | INCOMMINGSMSBODY | It contains the text of the received SMS message. |
| Ci | INCOMMINGSMSTRIGGERIN | If the new SMS message has been received, the value is incremented by 1. It may be used as the trigger of receiving the new SMS message. |
| Co | INCOMMINGSMSTRIGGEROUT | It confirms the reading of the SMS message. The value from the I/O tag with |
address INCOMMINGSMSTRIGGERIN is set up in | INCOMMINGSMSTRIGGERIN address must be written to this I/O tag. |
| SMS receipts |
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| TxtI | INCOMMINGRECEIPTID | It keeps the unique identifier of an SMS message, which was chosen during its sending. |
| Ci | INCOMMINGRECEIPTTRIGGERIN | If |
the | a new SMS receipt has been received, the value is incremented by 1. The value of |
identifier INCOMMINGRECEIPTID | the I/O tag with INCOMMINGRECEIPTID address is valid at the particular moment. |
| Co | INCOMMINGRECEIPTTRIGGEROUT | It confirms the reading of SMS receipt. The value from the I/O tag with |
address INCOMMINGRECEIPTTRIGGERIN is set up in | INCOMMINGRECEIPTTRIGGERIN address must be written to this I/O tag. |
| Common |
|---|
| Di | BUSY |
It informs | The I/O tag informing about modem status. |
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