GSM модем iRZ TC65 Lite
User Manual
12
2.3. GPRS Setting Up
Connection and setting up of the modem for the Internet access from a personal computer is
carried out as that from a standard modem. If the USB interface is used, you need to install the
driver. The necessary driver can be downloaded on the manufacturer’s site (www.radiofid.ru). In
case of any difficulties refer to the guidelines on the manufacturer’s site, the Support section.
For industrial applications the modem control is performed by standard AT commands.
2.4. Control, Restarting and Power Off
The modem is controlled by standard AT commands.
The modem can be restarted in the following ways:
·
by eight jumpings of the DTR line of the COM port into passive state (DTR < -2V),
duration of pulses and the pauses between the pulses must lie within the range 100-500
ms;
·
by issue of a control command by the GSM module via UART1 (time rate 115200 bps,
8-N-1) to the operating microcontroller (operation mode). The command format:
@MRST[XX]<CR>, where [XX] is the number of minutes in hexadecimal
representation (255 max), in which the module must be started – jumping to the
operation mode. If [XX] = 0, it should not be started. If the command is accepted
successfully, the response is “OK”, otherwise it is “ERROR”. The command is
completed with the code <CR> (‘\r’ or 0x0D in hexadecimal representation). Installation
of blockage or enabling for transition to the power standby mode in the menu mode does
not affect this command’s operation. During the issue of this command, the operating
microcontroller is expecting for the module’s deactivation (analysis of the PWR_IND
and VEXT pins) and starts it in a specified time period.
·
by restarting in a specified time period (WD interval, disabled on default), setting up is
carried out in the menu mode;
·
by temporary power-off.
The modem can be disabled using the following ways:
·
by program method, using the AT commands (transition to the power standby mode);
·
power supply disconnection.
When disabled by AT commands, the modem jumps to the power standby mode (minimum
consumption). Escaping from the power standby mode is made via the DTR line of the COM port or
upon the GSM module’s activation by the alarm clock.
