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====== LED indication ======
This article contains the description of LED indication, all device states and a device startup simulator.
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Gate
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===== Description of LED indicators =====
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^Label ^Function ^Meaning ^Colour ^
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|PWR |On/Off |The device is on/off |Red |
|ACT |Blinking |Indication of the device's state |Green |
|ACT - customized |Selectable |Based on the settings (see the note below) |Green |
|TX (RS485) |On |Indication of serial line broadcasting |Green |
|RX (RS485) |On |Indication of serial line receiving |Green |
|ETH port |On \\ Off \\ Blinking \\ Off |Connection established \\ Connection not established \\ Communication in progress \\ Connection not established |Green \\ \\ Yellow |
**Note:** \\
The Unipi Gate devices feature a freely programmable LED (marked as ACT) that can be controlled using standard Linux methods. In the OS the LED is available at **/sys/class/leds/unipi-sysled-xh** and is set to "timer" mode by default.
===== Description of the individual device states =====
This chapter contains a description of all LED states for Unipi Gate, including the normal state or a troubleshooting guide if the device is in a mode for too long. Next to the state description is a picture showing the status of LED indicators.
==== All LEDs are off ====
Power supply is unplugged or the device was shut down via SW (eg. using SSH). If the device doesn't change its state after unplugging the power supply and plugging it back, it is likely damaged. Please contact the technical support.
{{ :en:hw:gate.png?direct&135 |}}
==== PWR is on ====
The device is powered. If the device remains in this state longer than a minute, it is likely the bootloader (uboot) is missing. Please contact the technical support.
{{ :en:hw:gate_on.png?direct&135 |}}
==== PWR + ACT are on ====
If the device remains in this state for longer than a minute, a bootloader error has occurred. Try to reflash the system using USB. If this method fails, contact the technical support.
{{ :en:hw:gate_on_act.png?direct&135 |}}
==== PWR is on, ACT blinks rapidly ====
A default state for booting the OS. If the device remains in this state for longer than a minute, a system boot error has occurred. Try to reflash the system using USB or the service interface. If this method fails, contact the technical support.
{{ :en:hw:gate_startos_brick.gif?direct&135 |}}
==== PWR is on, ACT is on with short blinks ====
The device's OS is running. The device works correctly.
{{ :en:hw:gate_running.gif?direct&135 |}}
==== PWR is on, ACT is on with short blinks, TX and RX are blinking ====
The device's OS is running, the control program communicates via RS485. The device works correctly.
{{ :en:hw:gate_running_txrx.gif?direct&135 |}}
==== PWR is on, the rest is blinking (600 ms) ====
The device runs in the service mode.
{{ :en:hw:gate_service.gif?direct&135 |}}
==== PWR is on, the rest blinks rapidly (80 ms) ====
Indication of flashing the OS or creating its backup.
{{ :en:hw:gate_flashing.gif?direct&135 |}}
/* ------------------------------------ */
===== Device startup modes =====
By default, the Unipi Gate can be started in two modes - the **[[en:hw:025-gate:01-first-steps#regular_mode|regular mode]]** and the **[[en:hw:025-gate:service-mode#service_mode|service mode]]**. Each mode has its own LED indication. A device startup simulator is available below including a LED frequency table for both modes. The simulator demonstrates the startup process all the way from plugging in the power supply to the device's start. The simulation also includes the **SERVICE** button state for any non-default mode. The simulation can be started by the **Plug in power** button under the device's picture.
==== Regular mode ====
\\ Watch the **ACT** diode during a regular startup. The "**uboot**" OS bootloader will start first, indicated by the diode turning on. The finish of the bootloader start is indicated by the diode turning off with a short blink. After few moments the OS boot will start, indicated by two short blinks of the diode. \\
The device is ready when the **ACT** diode is continuously ON and repeatedly turns off for a short time.
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^Behaviour description ^Meaning ^ Off ^ On ^ Off ^
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|ACT is on |Bootloader start (uboot) | 3000ms | 1750ms | |
|ACT blinks once |The bootloader is running | 250ms | 75ms | 1000ms |
|ACT blinks twice |The device's OS is booting | 250ms | 75ms | |
|ACT is continuously on and repeatedly turns off for a short time |The OS is running, the device is ready for use | 50ms | 2000ms | |
{{ :en:hw:gate.png?direct&135 |}}
Plug in power
==== Service mode ====
If you are looking up for a guide on how to enter and use the service mode, please visit the [[en:hw:025-gate:service-mode|this article]].
The **SERVICE** button is pressed and held before plugging in the power supply. Then watch the ACT diode. After plugging the power supply in, the "**uboot**" bootloader will start first, indicated by the diode switching on. Roughly 4 seconds later, you can release the button - the diode will stay on. The finish of the bootloader start is indicated by the ACT diode turning off with a very short blink. After few moments the OS boot will start, indicated by two short blinks of the diode.
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^Behaviour description ^Meaning ^ Off ^ On ^ Off ^
|ACT is on |Bootloader start (uboot) | 3000ms | >5000ms | |
|ACT blinks once |The bootloader is running | 250ms | 75ms | 1000ms |
|ACT blinks twice |The device's OS is booting | 250ms | 75ms | |
|ACT and all TX and RX diodes blink slowly |The device is in service mode | 600ms | 600ms | |
{{ :en:hw:gate.png?direct&135 |}}
Plug in power
=== Special functions of the service mode - flashing the OS from a USB drive ===
If you are looking for a guide how to flash the OS, please visit [[en:hw:025-gate:image|this article]].
The USB drive is inserted into the device and the **SERVICE** button is pressed and held before plugging in the power supply. Next states of LEDs and the button are identical to the service mode until the OS is started.
After a while the OS boot will start, indicated by very short blinks of the **ACT** diode and all **TX**, **RX** diodes. The device will reboot after finishing the process.
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^Behaviour description ^Meaning ^ Off ^ On ^
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|ACT and TX, RX diodes blink quickly |Flashing the OS | 80ms | 80ms |
{{ :en:hw:gate.png?direct&135 |}}
Plug in power