TRB1 Software Development Kit instructions

Introduction

This article contains instructions on how to utilize Teltonika SDK packages for TRB1xx series devices. The resources used in the provided examples are:

• A TRB140 gateway
• Ubuntu 16.04 OS
• SDK version TRB1_R_GPL_00.02.05.2

However, the examples apply to other routers, SDK versions and operating systems. In most cases the difference will only be that of a visual nature.

Most examples provided in this page are independent from each other. But it is highly recommended to acquaint yourself with the basics by reading the "Prerequisites" and "Compiling a standard firmware" sections first as they contain information that will be necessary in order to understand some aspects of the other examples.

It should also be noted early that the first time you compile a firmware it may take about two hours to complete. On later attempts the duration is considerably lower.

Prerequisites

You will need:

• A PC, laptop or virtual machine running Linux OS (We recommend using Ubuntu 16.04 LTS)
• A TRB1xx series gateway
• An SDK intended for your router, which can be downloaded here: Software Development Kit

Compiling a standard firmware

First, you must install the packages required for the SDK to work. Open the Terminal application (Ctrl + ALT + T) and execute the following commands:

sudo apt update

sudo apt install -y gcc binutils bzip2 flex python3.6 perl make grep diffutils unzip gawk subversion zlib1g-dev build-essential u-boot-tools

Create a new folder (for this example I'll be using a directory called TRB1 found at my hard drive directory) and extract the SDK archive inside it. You can achieve this with drag and drop or by executing this command via Terminal:

tar -xf ~/Downloads/TRB1_R_GPL_00.XX.YY.Z.tar.gz -C ~/TRB1

Note: don't forget to replace the file name and path in accordance with your own circumstances

Open a Terminal inside the SDK directory. You can change the directory in your current terminal (cd ~/TRB1/openwrt-gpl-mdm9x07.Linux-x86_64).

Once you open the Terminal you can compile a standard firmware by executing this command in the terminal:

make

If all is in order, the output should look something like this:

Note: the first time you compile a firmware file it may take up to two hours before it is complete. Don't close the Terminal window up until then. Once it is finished, you will find the firmware in the ./bin/targets/mdm9x07/generic/tltFws directory. It should contain a file TRB1_R_GPL_00.XX.YY.Z_WEBUI.bin, it can be used to upgrade your router's firmware via its web interface.

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You can speed up this process by passing an extra argument -j. This argument then compiles the necessary packages in parallel. To know how much jobs you can pass to the compiling process execute this command in the terminal:

 nproc

This commands output should be a number. This number tells how much processing units are available to the current process. Now execute this command in the terminal:

 make -j<nproc_output>

Selecting packages

To select which packages should be compiled into the firmware is through a special menu called Kconfig. To enter the Kconfig, standing in your projects root directory execute this command in the terminal:

make menuconfig

After executing this command you should see a view like in the picture below.

To move around in the Kconfig use the arrows on the keyboard, space bar to select or to unselect the package, and enter key to enter sub directories of packages.

Note: Do not unselect any package if you do not know what you are doing.

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Packages have three markings:

1. <*> - this symbol says that the package will be compiled an added to the firmware
2. <M> - this symbol says that the package will be compiled but will not be added to the firmware
3. < > - this symbols says that the package will not be compiled and will not be added to the firmware

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By default all packages that were marked as to be compiled in the process, can be found separately from the firmware. Packages can be found in directory /path/to/trb1/project/openwrt-gpl-mdm9x07.Linux-x86_64/bin/packages/arm_cortex-a7_neon-vfpv4.

This directory also has five sub directories. Packages are categorized in these directories by there type.