6.6 Starting to develop the customer application........................................................40
6.6.1 Available APIs.................................................................................................40
6.6.2 CAN Bus FMS API.........................................................................................41
6.6.3 RS232 Driver...................................................................................................41
6.6.4 Software Application Notes.............................................................................41
7 Updating owa4x FW....................................................................................................42
7.1 uSD........................................................................................................................42
7.2 TFTP server...........................................................................................................43
7.3 Creating a customized UBIFS image from owa4x FS tree...................................44
7.4 Creating a customized UBIFS image from current FS running in owa4x.............46
7.5 Starting the recovery image...................................................................................46
7.5.1 FW < 1.1.x.......................................................................................................46
7.5.2 FW >= 1.1.x.....................................................................................................47
8 U-boot environment.....................................................................................................49
8.1 System boot protection..........................................................................................49
9 systemd - system and service manager........................................................................50
9.1 Introduction...........................................................................................................50
9.2 Boot process..........................................................................................................50
9.3 Unit files................................................................................................................50
9.3.1 Enabling and disabling services......................................................................51
9.3.2 Grouping services............................................................................................51
9.4 System logging......................................................................................................51
10 Backup FS..................................................................................................................52
11 Installation.................................................................................................................52
11.1 owa4x dimensions................................................................................................52
11.2 Mounting the unit.................................................................................................52
11.2.1 Antenna Location and installation.................................................................52
11.2.2 Antenna Tuning.............................................................................................53
11.2.3 Antenna Cable Routing..................................................................................53
11.3 Power connection.................................................................................................53
11.4 Choosing a location.............................................................................................53
11.5 Opening the unit...................................................................................................54
11.6 Mounting and fixing the unit...............................................................................54
12 Technical data summary............................................................................................56
12.1 General Specification..........................................................................................56
12.2 Mechanical Description.......................................................................................56
12.3 Power Interface....................................................................................................56
12.4 GSM/GPRS Specifications..................................................................................56
12.4.1 Owa4x with HW < R4...................................................................................56
12.4.2 Owa4x with HW = R4...................................................................................57
12.5 GNSS Specifications...........................................................................................57
12.6 Environmental Specifications..............................................................................58
12.7 Battery Backup....................................................................................................58
13 References.................................................................................................................59
14 History.......................................................................................................................60
Illustration 1: owa4x frontal view.................................................................................10
Illustration 2: WiFi-BT antenna placement...................................................................11
Illustration 3: owa4x rear view.....................................................................................11
Illustration 4: No IP67 rear back cover........................................................................12
Illustration 5: IP67 rear back cover..............................................................................12
Illustration 6: IP67 rear back cover with cable gland...................................................13
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