The device is our own development, largely based on the experience gained in developing tracking devices and fieldwork experiences. LT2001 is common name for a family of devices in which we include LRIT device called LT2001-LRIT and device called VMS LT2001-VMS. Both devices share the same hardware, which is based on reliable and low-consuming ARM Cortex-M3 microcontroller and reliable operating system.
Due to the simplicity and modularity, LT2001 offers a connection of one serial bus that can be CAN 2.0B or RS232 serial bus. A user must choose the type of bus according to the needs of application in which the LT2001 will be installed. For communication it is possible to use CAN 2.0B or RS232 wired connection. In case of connection with RS232, it is possible to do so via RS232 connector on the terminal or PC. Any terminal can be used as software, e.g. HyperTerminal or Minicom, and using –AT commands you can configure or transfer desired information from LT2001 to the terminal. It is also possible to upgrade software through terminal and with use of Y-modem communication protocol. Software upgrade can be done only at startup of LT2001 when Bootloader menu begins and allows the operator to make some specific interventions.
When planning the device’s housing we took into account our rich fieldwork experiences, user preferences and environment in which the device will work, which lead us to housing made of high quality and tested materials. Some problems on the terrain may cause separate antenna, but with LT2001 it is installed inside the enclosure and so makes it cheaper and easy to be mounted on a pole diameter 25 mm to 76 mm. Power cord is installed through cable glands on the LT2001 and qualified installer must ensure proper installation of cable and connection to a supply line. Cable used is intended for use within shipbuilding industry. The diameter of wires and cable structure corresponds with supply standards and also with communication standards for CAN2.0B, which determines the diameter and capacity of a wire.
FAQ
HARDWARE
If you have already wired the device to a power supply, then check power supply at the terminals, which should be in the range of 10.8 – 36V DC. Connection manner can be seen in the LT2001 installation instructions. If you have a flow meter available (Ammeter) connect it sequentially to the power supply branch and it should show in average 120mA/12V of power consumption or power consumption is of the order of 1.4W (P = Ui * I = 0.12A * 12V = 1.4W).
If LT2001 supports RS232 communication than connect to PC via RS232 interface port (the same applies to Rs232 <-> USB port) with wiring scheme. Set the RS232 terminal port to: 9600 baud, 1 START, 1 STOP, NO PARITY, NO FLOW Control. Follow the instructions – AT commands.
Upgrading of LT2001 firmware is supported in Bootloader mode which is started when the LT2001 is switched on. You should connect a PC to LT2001 with RS232 connection and turn on or reset the device. You will see a Bootloader logo and you must press a key, to stop automatic loading of firmware. New firmware is downloaded with Y-modem protocol and all the details are described in -LT2001 bootloader mode-.
Try to find the cause of the lost link. You should chem power supply, the cable and the device itself. In case of smaller glitches and that the connection was lost only for a few seconds, Y-modem protocol will re-establish communication automatically. But you can always still enter the Bootloader mode, where you can start the upgrading again. If you still cannot find the cause, contact Aerium d.o.o.
Every device is equipped with a label, where you can find serial number of a device, type of model and the manufacturer. Please, check the -LT2001 identification- document for description of label.
Aerium d.o.o. entered the market with two models of the devices called LT2001-LRIT and LT2001-VMS, which are designed for specific applications. However, the firmware of the device can easily be changed and so the device can be used for various applications. For example, LT2001 can be used as a transport channel, where external device is connected to the LT2001 with RS232 or CAN 2.0B and this device can then send custom messages to data centre. It works also in the opposite direction. All this can be done with the help of -AT commands-, trough terminal mode.
SOFTWARE:
Yes, this is possible and there are actually two ways to do this. You can use AT command AT+CGPS? or you can turn on continues NMEA-0183 sentences on the RS232 using the ATG1 command and ATG0 to turn them off. In former case, on the serial port you will receive GPS sentences according to NMEA-0183 standard and all AT commands will be disabled, except the ATG0 to turn this mode off.
Bot signal strength can be checked with the command AT+CSQx?, where you replace x with 0 for GPS signal and 1 for Iridium signal.
You can connect a custom device to LT2001 with RS232 or CAN 2.0B bus and then use an AT command set. If you’d like something else then AT commands, please contact Aerium d.o.o. for further explanation.
All the data from LT2001 is sent over Iridium network to ADC (Aerium Data Centre) , where they are forwarded to specified users. For detailed description, how you can receive those data, please see the -Aerium Data Centre- manual.
Yes. The communication is bidirectional and works in bot ways, from the device and to the device. Every data received by LT2001 is examined and if this is configuration data, the configuration of the LT2001 is checked. It can also be forwarded to serial bus, to external device. We have a simple WEB interface which can be used to send parameters to LT2001. You need to register to obtain the user name and password, to access this WEB page.
