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<table class="nd-othertables_2" style="width:100%; border-collapse: collapse;">
== 2026.06.04: Firmware update safety mechanism in FOTA Web ==
<tr>
 
<th style="width:1%; vertical-align: middle; text-align: center;">AVL ID</th>
We would like to inform you about an upcoming improvement in the FOTA WEB system, designed to enhance the safety and reliability of firmware updates for the devices. 
<th style="width:1%; vertical-align: middle; text-align: center;">Property Name</th>
 
<th style="width:1%; vertical-align: middle; text-align: center;">AVL ID</th>
{| class="wikitable"
<th style="width:1%; vertical-align: middle; text-align: center;">Property Name</th>
|+
</tr>
! colspan="3" style="text-align: left; background: white;" |Change description
<tr>
|-
<td style="vertical-align: middle; text-align: center;">13814</td>
| style="text-align: left; background: white;" |Change type
<td style="vertical-align: middle; text-align: center;">ABS status 2nd trailer</td>
| colspan="2" style="text-align: left; background: white;" | Firmware update safety mechanism
<td style="vertical-align: middle; text-align: center;">13839</td>
|-
<td style="vertical-align: middle; text-align: center;">ROP system status 2nd trailer</td>
| rowspan="2" style="width: 221px; text-align: left; background: white;" |Detailed description
</tr>
| colspan="2" style="width: 908px; text-align: left; background: white;" |We are introducing a new safety mechanism in FOTA WEB that prevents firmware updates from being executed on devices running an outdated bootloader version and in this case the firmware update task won’t be possible. This helps eliminate the risk of device malfunction during update procedures.
<tr>
|-
<td style="vertical-align: middle; text-align: center;">13815</td>
| style="text-align: left; background: white;" |'''Required bootloader version:'''<br>Minimum required: 65.0E (displayed as 101.14 in FOTA Web).<br>Devices with an older version must first apply a bootloader patch before updating to newer firmware.
<td style="vertical-align: middle; text-align: center;">Retarder control status 2nd trailer</td>
| style="text-align: left; background: white;" |'''Recommended update path:'''<br>Any firmware → FM65.Ver.03.01.00.Rev.28 → (if required) FM65.Ver.03.01.00.Rev.34_1666 → FM65.Ver.03.01.01.Rev.15 or newer
<td style="vertical-align: middle; text-align: center;">13840</td>
|-
<td style="vertical-align: middle; text-align: center;">YC system status 2nd trailer</td>
| style="text-align: left; background: white;" |Change reasons
</tr>
| colspan="2" style="text-align: left; background: white;" | Certain newer firmware versions, such as FM65.Ver.03.01.01.Rev.15 and later, exceed 1 MB in size. Devices with older bootloader versions may not support these updates safely. The new mechanism ensures that such updates are only performed when the device meets the required bootloader conditions.
<tr>
|-
<td style="vertical-align: middle; text-align: center;">13816</td>
| style="text-align: left; background: white;" |Safety mechanism launch date
<td style="vertical-align: middle; text-align: center;">Red warning signal request 2nd trailer</td>
| colspan="2" style="text-align: left; background: white;" |Jun 15, 2026
<td style="vertical-align: middle; text-align: center;">13841</td>
|-
<td style="vertical-align: middle; text-align: center;">Traction help status 2nd trailer</td>
|}
</tr>
 
<tr>
{| class="wikitable"
<td style="vertical-align: middle; text-align: center;">13817</td>
|+
<td style="vertical-align: middle; text-align: center;">Amber warning signal request 2nd trailer</td>
! colspan="3" style="text-align: left; background: white;" |Affected products
<td style="vertical-align: middle; text-align: center;">13842</td>
|-
<td style="vertical-align: middle; text-align: center;">Lift axle 1 position status 2nd trailer</td>
| style="width: 221px; text-align: left; background: white;" |Model
</tr>
| style="width: 448px; text-align: left; background: white;" |Affected order codes
<tr>
| style="width: 448px; text-align: left; background: white;" |Order code changes
<td style="vertical-align: middle; text-align: center;">13818</td>
|-
<td style="vertical-align: middle; text-align: center;">Axle load sum 2nd trailer</td>
| style="text-align: left; background: white;" |FMC650
<td style="vertical-align: middle; text-align: center;">13843</td>
| style="text-align: left; background: white;" |All order codes
<td style="vertical-align: middle; text-align: center;">Lift axle 2 position status 2nd trailer</td>
| style="text-align: left; background: white;" |-
</tr>
|-
<tr>
|}
<td style="vertical-align: middle; text-align: center;">13819</td>
 
<td style="vertical-align: middle; text-align: center;">Retarder wheel torque reference 2nd trailer</td>
{| class="wikitable"
<td style="vertical-align: middle; text-align: center;">13844</td>
|+
<td style="vertical-align: middle; text-align: center;">Steering axle locking status 2nd trailer</td>
! colspan="3" style="text-align: left; background: white;" |Change impact
</tr>
|-
<tr>
| style="width: 221px; text-align: left; background: white;" |Risk assessment
<td style="vertical-align: middle; text-align: center;">13820</td>
| colspan="2" style="width: 908px; text-align: left; background: white;" |The bootloader patch firmware (Rev.34_1666) is an intermediate step and not a full firmware version. Using it as a standalone firmware may lead to limited functionality or unexpected behavior.
<td style="vertical-align: middle; text-align: center;">Service brake status 2nd trailer</td>
 
<td style="vertical-align: middle; text-align: center;">13845-13859</td>
Starting from version 03.01.00.Rev.28, devices automatically block firmware updates if the bootloader is too old. This protection significantly reduces the risk of bricking.
<td style="vertical-align: middle; text-align: center;">Each wheel tire pressure status* 2nd trailer</td>
|-
</tr>
| style="text-align: left; background: white;" |Suggested implementation plan
<tr>
| colspan="2" style="text-align: left; background: white;" |Only a limited number of devices require a bootloader update. We recommend avoiding unnecessary bootloader updates. To ensure a smooth and safe firmware update process, please follow the recommended update path sequence provided in the Change description.
<td style="vertical-align: middle; text-align: center;">13821</td>
|-
<td style="vertical-align: middle; text-align: center;">Electrical supply status 2nd trailer</td>
|}
<td style="vertical-align: middle; text-align: center;">13860-13874</td>
 
<td style="vertical-align: middle; text-align: center;">Each wheel tire pressure* 2nd trailer</td>
{| class="wikitable"
</tr>
|+
<tr>
! colspan="3" style="width: 1141px; text-align: left; background: white;" |Acknowledgement of PCN receipt
<td style="vertical-align: middle; text-align: center;">13822</td>
|-
<td style="vertical-align: middle; text-align: center;">Vehicle type 2nd trailer</td>
| colspan="3" style="text-align: left; background: white;" |If no feedback is received within two weeks after the issue date of this notification - Teltonika may accept that this change has been tacitly accepted and can implement the change as indicated above
<td style="vertical-align: middle; text-align: center;">13875-13889</td>
|-
<td style="vertical-align: middle; text-align: center;">Each wheel brake lining status* 2nd trailer</td>
|}
</tr>
<tr>
<td style="vertical-align: middle; text-align: center;">13823</td>
<td style="vertical-align: middle; text-align: center;">Axle load measured by towed vehicle 2nd trailer</td>
<td style="vertical-align: middle; text-align: center;">13890-13904</td>
<td style="vertical-align: middle; text-align: center;">Each wheel brake lining* 2nd trailer</td>
</tr>
<tr>
<td style="vertical-align: middle; text-align: center;">13824</td>
<td style="vertical-align: middle; text-align: center;">Axle load measured by external scale 2nd trailer</td>
<td style="vertical-align: middle; text-align: center;">13905-13919</td>
<td style="vertical-align: middle; text-align: center;">Each wheel brake temperature status* 2nd trailer</td>
</tr>
<tr>
<td style="vertical-align: middle; text-align: center;">13825</td>
<td style="vertical-align: middle; text-align: center;">Calibration data load level 2nd trailer</td>
<td style="vertical-align: middle; text-align: center;">13920-13934</td>
<td style="vertical-align: middle; text-align: center;">Each wheel brake temperature 2nd trailer</td>
</tr>
<tr>
<td style="vertical-align: middle; text-align: center;">13826-13831</td>
<td style="vertical-align: middle; text-align: center;">Brake cylinder pressure of each wheel 2nd trailer</td>
<td style="vertical-align: middle; text-align: center;">13935</td>
<td style="vertical-align: middle; text-align: center;">Vehicle pneumatic supply status 2nd trailer</td>
</tr>
<tr>
<td style="vertical-align: middle; text-align: center;">13832</td>
<td style="vertical-align: middle; text-align: center;">Trailer VIN** 2nd trailer</td>
<td style="vertical-align: middle; text-align: center;">13936-13950</td>
<td style="vertical-align: middle; text-align: center;">Each wheel air leakage detection* 2nd trailer</td>
</tr>
<tr>
<td style="vertical-align: middle; text-align: center;">13833</td>
<td style="vertical-align: middle; text-align: center;">VDC active 2nd trailer</td>
<td style="vertical-align: middle; text-align: center;">13951-13965</td>
<td style="vertical-align: middle; text-align: center;">Each tire temperature* 2nd trailer</td>
</tr>
<tr>
<td style="vertical-align: middle; text-align: center;">13834</td>
<td style="vertical-align: middle; text-align: center;">Lateral acceleration 2nd trailer</td>
<td style="vertical-align: middle; text-align: center;">13966</td>
<td style="vertical-align: middle; text-align: center;">Automatic towed vehicle braking status 2nd trailer</td>
</tr>
<tr>
<td style="vertical-align: middle; text-align: center;">13835</td>
<td style="vertical-align: middle; text-align: center;">Loading ramp approach assistance status 2nd trailer</td>
<td style="vertical-align: middle; text-align: center;">13967</td>
<td style="vertical-align: middle; text-align: center;">Electrical supply of non-braking system status 2nd trailer</td>
</tr>
<tr>
<td style="vertical-align: middle; text-align: center;">13836</td>
<td style="vertical-align: middle; text-align: center;">Supply line braking 2nd trailer</td>
<td style="vertical-align: middle; text-align: center;">13968</td>
<td style="vertical-align: middle; text-align: center;">Spring brake installation status 2nd trailer</td>
</tr>
<tr>
<td style="vertical-align: middle; text-align: center;">13837</td>
<td style="vertical-align: middle; text-align: center;">Stop lamps request 2nd trailer</td>
<td style="vertical-align: middle; text-align: center;">13969</td>
<td style="vertical-align: middle; text-align: center;">Electrical load proportional function installation status 2nd trailer</td>
</tr>
<tr>
<td style="vertical-align: middle; text-align: center;">13838</td>
<td style="vertical-align: middle; text-align: center;">Braking via electric control line support 2nd trailer</td>
<td style="vertical-align: middle; text-align: center;">13970</td>
<td style="vertical-align: middle; text-align: center;">Spring brake status 2nd trailer</td>
</tr>
<tr>
<td style="vertical-align: middle; text-align: center;"></td>
<td style="vertical-align: middle; text-align: center;"></td>
<td style="vertical-align: middle; text-align: center;">13971</td>
<td style="vertical-align: middle; text-align: center;">Pneumatic supply pressure 2nd  trailer</td>
</tr>
</table>

Latest revision as of 12:08, 2 June 2026

2026.06.04: Firmware update safety mechanism in FOTA Web

We would like to inform you about an upcoming improvement in the FOTA WEB system, designed to enhance the safety and reliability of firmware updates for the devices. 

Change description
Change type Firmware update safety mechanism
Detailed description We are introducing a new safety mechanism in FOTA WEB that prevents firmware updates from being executed on devices running an outdated bootloader version and in this case the firmware update task won’t be possible. This helps eliminate the risk of device malfunction during update procedures.
Required bootloader version:
Minimum required: 65.0E (displayed as 101.14 in FOTA Web).
Devices with an older version must first apply a bootloader patch before updating to newer firmware. 		Recommended update path:
Any firmware → FM65.Ver.03.01.00.Rev.28 → (if required) FM65.Ver.03.01.00.Rev.34_1666 → FM65.Ver.03.01.01.Rev.15 or newer
Change reasons Certain newer firmware versions, such as FM65.Ver.03.01.01.Rev.15 and later, exceed 1 MB in size. Devices with older bootloader versions may not support these updates safely. The new mechanism ensures that such updates are only performed when the device meets the required bootloader conditions.
Safety mechanism launch date Jun 15, 2026
Affected products
Model Affected order codes Order code changes
FMC650 All order codes -
Change impact
Risk assessment The bootloader patch firmware (Rev.34_1666) is an intermediate step and not a full firmware version. Using it as a standalone firmware may lead to limited functionality or unexpected behavior.

Starting from version 03.01.00.Rev.28, devices automatically block firmware updates if the bootloader is too old. This protection significantly reduces the risk of bricking.

Suggested implementation plan Only a limited number of devices require a bootloader update. We recommend avoiding unnecessary bootloader updates. To ensure a smooth and safe firmware update process, please follow the recommended update path sequence provided in the Change description.
Acknowledgement of PCN receipt
If no feedback is received within two weeks after the issue date of this notification - Teltonika may accept that this change has been tacitly accepted and can implement the change as indicated above
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