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==RS-485 Interface==

RS485 supports only Half Duplex communication. It means that at one time data is only sent/received.<br/>When activated RS-485 driver chip draws constant 30mA current.<br/>When Entering Sleep or Deep sleep, Chip will be powered off too.<br/>FMB125 RS-485 Pins connection diagram are shown on the Figure 66:

===RS-485 modes===
* RS485 transmit (FMB log) mode:
RS-485 works in transmit mode, it prints FM log. It won’t respond to commands.

* RS485 transmit (GNSS NMEA) mode:
RS-485 works in transmit mode, it prints GNSS NMEA log. It won’t respond to commands.

* RS485 receive (LLS) mode:
The mode supports up to five LLS fuel level sensors. Baud rate must be 19200. LLS have receiver id. LLS mode configuration shown in Figure 69.

* RS485 TCP (ASCII, Binary) mode:
In TCP ASCII mode link with external device using text messages can be established.
TCP Binary mode is the same as above but binary messages will be accepted.

==RS232 Interface==
RS-232 supports Full Duplex communication. It means that at the same time you can send/receive Data, because it uses separate lines for transmitting and receiving data.
Most of the modes are the same as RS-485.
FMB125 RS232 pins connection diagram are shown on the Figure 66.

===RS-232 modes===
In Configurator windows select RS232/RS485 window where is RS232 Settings (more information about available RS232/RS485 parameters configuration in 5.19.10 FMB125 RS232\RS485 parameters configuration chapter).
Most of the modes are the same as RS-485. Same modes are: log mode, NMEA, LLS, TCP Ascii and TCP Binary.
In RS232 LLS mode only one LLS fuel level sensor can be connected.

* RS232 LCD mode:
In this mode you can communicate with server through terminal. Link between FM and server has to be established for this functionality to work.

* RS232 RFID HID/RFID MF7 mode:
The difference between RFID Mode and RFID MF7 Mode is that in RFID Mode FMB125 understands RFID messages that are in hexadecimal format and RFID MF7 Mode understands messages that are in decimal format. For example:
RFID Mode message – “$aa$02$03$04$17$89$00$01”
RFID MF7 Mode message – “1213141519”
The chosen mode has to correspond to the RFID reader’s mode. What type of RFID is sent to FMB125 depends on the reader.
For more information about RFID ID’s and devices, please contact to your local sales representative.

* RS232 GARMIN mode:
Garmin provides a Fleet Management Interface Tool Kit which connected to FMB125 enables the driver to have a "screen" in their vehicle for real-time navigation, messaging, and job dispatch capabilities to help them be more efficient.
FMB125 and Garmin operational scheme is shown in Figure 77 below:

==Garmin protocols==
The following is a list of protocols supported and the corresponding feature/benefit. FMB125 can fully support Fleet Management Interface (FMI) versions up to 2.1. Other or higher versions may be supported, but Teltonika is not responsible for the changes made by Garmin, which may affect the work of FMB125 and Garmin products. For more information about Garmin products and FMI versions, please go to http://www8.garmin.com/solutions/pnd/supportedproducts.jsp. Notice that some Garmin products use different connection cables than others.

===Standard protocols===

Text Message Protocol:
* Allows text messages sent to device to be displayed in "inbox" on unit;
* Garmin can provide confirmation that message was read;
* Garmin can also provide a yes/no box below the text of the message to enable a simple quick response;
* Messages can be up to 199 characters in length;
* Messages can also be generated from device and sent to dispatch/office;
* Messages received will be notified to driver through a pop-up alert on Garmin screen;
* Garmin provides a "virtual keyboard" on device through a touch-screen format for all text communication.

Stop (Destination) Protocol:
* Garmin can display a list of Stops/Jobs reported to the device in a separate icon called "My Stops".
* Driver has ability to navigate directly to Stop from list.
* Garmin can provide status on current Stop in progress.
* Is driver stopped at location?
* How far has Driver progressed through the list of Stops?
* Garmin can also provide confirmation that driver has received a particular Stop, read the details, or deleted it from list.
* Can provide confirmation that a Stop has been completed.

Estimated Time of Arrival Protocol:
* Dispatcher/office can request the ETA of the current stop/job in progress.
* Garmin will notify the actual time of arrival as well as distance remaining to stop.

Auto-Arrival at Stop Protocol:
* This feature is used to tell the Garmin PND to automatically detect that it has arrived at a Stop and then to prompt the driver if they would like to mark the Stop as done and begin navigating to next Stop on the list.
* Auto-arrival can be determined by how long the unit is stopped close to the destination (in the event driver has to park and walk) or by how close the unit needs to be to the destination before the Auto-arrival feature is activated.

Data Deletion Protocol:
* Dispatch/office has the ability to wipe clean the data on the Garmin PND.
* Clean up messages in inbox/remove stops.

===Enchanced protocols===

Canned Responses/Messages:
* Fleet managers can communicate by sending up to 200 "canned" responses from server to be stored directly on Garmin devices.
* Up to 50 of these canned responses can be utilized for any given scenarios.
* Drivers can store up to 120 canned messages, eliminating the need to type while driving

Status Protocol:
* Up-to-the-minute communications that allow drivers to automatically send status updates.
* Driver's units can store up to sixteen status indicators such as start/stop shift, on/off break, etc.

===Supported features on TAVL client application===
TAVL client application lets user to use the following features of GARMIN FMI:
# Text messaging;
# Destination message;
# ETA request.

===Text messaging===
Text messaging feature lets user to communicate with driver (user that uses Garmin device) by sending text messages via GPRS.

===Destination message===
Destination message is used to inform a driver of a new destination. When Garmin device receives a destination message from server it displays it as “Stop” to the driver and also gives the driver ability to start navigating to the “Stop” location. New destination in Tavl client is represented as Geozone so new Geozone (as destination) has to be created first.

===ETA request message===
ETA (Estimated Time of Arrival) request message is used when user wants to know expected arrival time to currently active destination and distance (in meters) from current object location to currently active destination.

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