TRB255 Input/Output

The information in this page is updated in accordance with firmware version TRB2_R_00.07.11.3.

Summary

Inputs and outputs are used for monitoring and controlling a connected device or receiving signals from that device in order to trigger certain events.

This chapter of the user manual provides an overview of the Input/Output section for TRB255 devices.

If you're having trouble finding this page or some of the parameters described here on your device's WebUI, you should turn on "Advanced WebUI" mode. You can do that by clicking the "Advanced" button, located at the top of the WebUI.

Physical characteristics and I/O pin mapping

Electrical characteristics and I/O pin mapping information are presented below.

16 pin Connector Pinout

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• +: 9-30 VDC positive (+).
• D1, D2, D3 - programmable input/output pins; can be set to:
  • open collector (OC) output; max 30 V, 300 mA;
  • digital input; 0-6 V is detected as logic "low"; 8-30 V is detected as logic "high".
• CTS - RS232 clear data to send (output).
• RTS - RS232 request data to send (input).
• R+ - RS485 receiver positive signal.
• D+ - RS485 driver positive signal.
• - - negative/ground (-).
• ⏚ - GND pins for D1, D2, D3, A, RS232 and RS485
• A - Analog input. Voltage range: 0-30 V.
• TX - RS232 transmitted data (input).
• RX - RS232 received data (output).
• R- - RS485 receiver negative signal.
• D- - RS485 driver negative signal.
• Note: input circuit components have tolerance of +-1%.

Status

The Status page displays the current states of the device's input and output pins:

You can invert an Input pin by clicking the on/off slider under the "Inversion" column or switch the state of an Output pin by clicking the on/off slider under the "State" column.

User can Rename Input/Output interface by clicking on the "Edit" button.

Note: You can edit the adc/acl formula to customize values.

Custom I/O status labels for "Analog input":

Custom I/O status labels for "Analog current loop":

Status from command line

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You can also obtain the status of input and output pins via the command line (CLI or SSH). List of possible ubus values in TRB255 devices:

ioman.adc.adc0  - Analog input
ioman.gpio.dio0 - Configurable input/output (PIN2)
ioman.gpio.dio1 - Configurable input/output (PIN3)
ioman.gpio.dio2 - Configurable input/output (PIN4)

Call command ubus call value status :

root@Teltonika-TRB255:~# ubus call ioman.gpio.dio0 status
{
        "value": "0",
        "direction": "out",
        "bi_dir": true,
        "invert_input": false
}

• dio0 is configurable input / output:
  • "value": "0" means low level state.
  • "value": "1" means high level state.
  • "direction": "in" means input state.
  • "direction": "out" means output state.
• adc0 is analog input:
  • "value": "0.54" means 0.54V.

To change input settings, use the update command and specify a value:

ubus call ioman.gpio.dio0 update '{"value":"0"}'
ubus call ioman.gpio.dio0 update '{"value":"1"}'
ubus call ioman.gpio.dio0 update '{"direction":"in"}'
ubus call ioman.gpio.dio0 update '{"direction":"out"}'

Note: Changes of configurable pin type from output to input (and reverse) could causes the issues where the specific type was set in configurations. Make sure that configurations do not contradict one another.

Post/Get

Enabling Post/Get provides the possibility to control the state of an output via HTTP POST/GET requests. The figure below is an example of the Auth Settings section of the Post/Get page. It is used to turn Post/Get requests on or off and to set authentication parameters.

Field	Value	Description
Enable	off | on; default: off	Turns Post/Get on or off.
Access	io_state | io_type | io_value | io_invert; default: io_state, io_type, io_value, io_invert	Accessible methods. It is considered that all methods are allowed if this list is empty.
Username	string; default: none	Username used for authentication in POST/GET queries.
Password	string; default: none	Password used for authentication in POST/GET queries.
Confirm password	string; default: none	Repeat the password for confirmation.

Note: password fields are required to enable POST/GET funcionallity.

Post/Get examples

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Use a web browser or any other compatible software to send HTTP POST/GET requests to the device.

Setting

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Changing states of various I/O is possible using requests. Below is a table containing syntax examples of this usage:

Action	POST/GET URL
Turn Output state to high	http://192.168.1.1/cgi-bin/io_state?username=user1&password=user1&pin=<dio0/dio1/dio2>&state=on
Turn Output state to low after 5 seconds for 3 seconds	http://192.168.1.1/cgi-bin/io_state?username=user1&password=user1&pin=<dio0/dio1/dio2>&state=on&delay=5&time=3
Check t_time parameter - time is set in miliseconds	http://192.168.1.1/cgi-bin/io_state?username=user1&password=user1&pin=<dio0/dio1/dio2>&state=on&t_time=msec&time=5000&time=1000
Invert input	http://192.168.1.1/cgi-bin/io_invert?username=user1&password=user1&pin=<dio0/dio1/dio2>&invert=<0/1> (0 - disable inversion/1 - enable inversion
Change Configurable Input/Output with pin3 to Output	http://192.168.1.1/cgi-bin/io_type?username=user1&password=user1&pin=dio0&type=out

Overview:

• 192.168.1.1 - device default LAN IP address; replace it in accordance with your own configuration.
• io_state,io_type or io_invert- allows you to change IO state, type or invert cofigurable input.
• username - login name from Post/Get configuration.
• password- password from Post/Get configuration.
• state - turn Output on or off.
• type - turn Configurable Input/Output to Input or Output.
• invert - enables inversion on/off (only works with inputs).
• delay - defines a delay (in seconds) after which the specified action will be performed.
• time - defines a window of time during which the action will take place. For instance, if you post an on action while specifying time=5, the output will turn on and stay on for 5 seconds before turning off.

Delay and time parameters can be used together. For example, if delay is 10, time is 5, action is on, then 10 seconds after the execution of the command, the output will switch to on (or stay in on state if it was already that way), then after 5 more seconds it will switch to off state. In this case the overall command execution time is 15 seconds.

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To use Post/Get via SSH instead of a browser, you may want to use the curl -X command. Simply add the same URL command in between quotes and specify the HTTP method.

Examples:

• Switch output to High:

curl -X GET "http://192.168.1.1/cgi-bin/io_state?username=user1&password=user1&pin=dout1&state=on"

• Switch output to Low after delay:

curl -X GET "http://192.168.1.1/cgi-bin/io_state?username=user1&password=user1&pin=dout1&state=off&delay=5"

Reading

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Getting the current state of various I/O is possible using requests. Usage is very similar to the examples above:

Examples:

• Read state of Configurable Input/Output PIN2/PIN3/PIN4:

curl -X GET "http://192.168.1.1/cgi-bin/io_value?username=user1&password=user1&pin=dio0"
curl -X GET "http://192.168.1.1/cgi-bin/io_value?username=user1&password=user1&pin=dio1"
curl -X GET "http://192.168.1.1/cgi-bin/io_value?username=user1&password=user1&pin=dio2"

• Read state of analog input (in voltage mode):

curl -X GET "http://192.168.1.1/cgi-bin/io_value?username=user1&password=user1&pin=adc0"

Posible responses:

• `io_value` for all pins

* Bad username or password
* Pin does not exist

• `io_value` for din1, dout1, dio1/2/3

* 0
* 1

• `io_value` for adc0

* float value

Scheduler

The output Scheduler can be used to configure a timetable of when an output should be turned on or off, based on days of the week or month and hours of the day. The General Configuration section is used to turn the Output Scheduler on or off.

The Scheduler is configured in the form of Instances. A Scheduler Instance defines a time interval during which the state of an output associated with the instance will be set to "High". The Output Scheduler Instances list is empty by default. Click the 'Add' button in order to create a new Scheduler Instance:

After this you should be redirected to the configuration page for the newly added Instance which should look similar to this:

Field	Value	Description
Enable	off | on; default: off	Turns the Scheduler Instance on or off.
Pin	output pin; default: Configurable Input/Output (3)	Output pin. The state of the selected output will be set to "High" during the time interval defined in the fields below.
Interval Type	Weekdays | Month Days; default: Weekdays	Selects the interval type for scheduler to use.
Start Day	[Monday..Sunday] | [1..31]; default: Monday | 1	The day that marks the start of the time interval.
Start Time	hh:mm ([00..23]:[00..59]); default: 12:00	The hour and minute that mark the start of the time interval.
End Day	[Monday..Sunday] | [1..31]; default: Tuesday | 1	The day that marks the end of the time interval.
End Time	hh:mm ([00..23]:[00..59]); default: 12:00	The hour and minute that mark the end of the time interval.
Force Last Day	off | on; default: off	Forces intervals to accept last day of month as a valid option if selected day does not exist during ongoing month. This field becomes visible only when 'Interval Type' is set to Month Days.

A Scheduler Instance will not work unless you turn both the the Scheduler service and the individual instance on:

I/O Juggler

The I/O Juggler is a feature that provides the possibility to create automated rules that perform certain actions based on Input state changes and other conditions. The operating sequence of I/O Juggler can be visualized as such:

When an Input Trigger occurs, the Input check to see if user-specified conditions are also met. If so, it executes a user-specified action.

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For example, if we configure the I/O Juggler like this:

• Trigger - input state rising.
• Condition - 8:00 AM - 5:00 PM.
• Action - send email.

The operating sequence would look like this:

1. A connected device raises the input state.
2. This TRB255 device checks whether the current time is between 8:00 AM and 5:00 PM.
   • Yes - TRB255 sends an email.
   • No - TRB255 doesn't send an email.

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You can specify multiple actions and multiple conditions for any I/O Juggler rule. Selecting conditions is optional. If there are no set or configured I/O Juggler conditions, the operating sequence is as such:

General

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The General section is used to Input Trigger rules, which can perform a specified user-configured action when the Input state changes and when certain other user-configured conditions are met (conditions are optional).

Before you can use the I/O Juggler, you must turn it on first (off by default). This can be done by setting the 'Enable' slider to "on"*:

* Input rules for Configurable I/O will work only when the type of the pin is set to "input"

Input

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The Input is used to create Input Rules. An Input Rule is triggered by a user-specified input state change. When this trigger occurs, the device executes a specified command if certain specified conditions are met (conditions are optional).

The Input list is empty by default. To create a new Input Rule, look to the Add Input section at the bottom of the page; select an input and click the 'Add' button:

After this you will be redirected to the configuration page for the newly added Rule, which should look similar to this:

Field	Value	Description
Enabled	off | on; default: off	Changes current profile to specified one when action triggers.
Trigger interval	integer [0..99999999]; default: 1	The shortest amount of time (in seconds) between two triggers. If the input is triggered more than once in a time period shorter than the value specified in this field, the device will react to the first trigger.
Trigger	Rising | Falling | Both; default: Rising	Input state change that will trigger this rule.
Add actions	i/o juggler action(s); default: none	Actions that will be executed by this rule when the specified trigger and conditions (optional) occur.
Add conditions	i/o juggler conditions; default: none	Conditions that have to be met for the rule to take action. Conditions are optional.

Actions

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The Actions section is used to manage and create new Actions that can be executed by the I/O Juggler Rules. The figure below is an example of the Actions section, which is empty by default.

To create a new Action, look to the Add an Action section at the bottom of the page; enter a custom name, select an action type and click the 'Add' button:

After this you will be redirected to the configuration page for the newly added Action, which should look similar to this (example for action 'Type: Reboot'):

Action configuration depends on the selected action 'Type'. Each Action can have one or multiple user-defined Conditions assigned to it. Actions that have Conditions assigned to them are executed only if the Conditions are met (a trigger occurrence is not enough to set off these actions). Assigning to Actions is optional.

You will find descriptions of each different action Type described on the sections below.

Type: Email

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Sends an email to specified recipients. Requires an existing email account configuration on the device. Email accounts can be configured in the System → Administration → Recipients → Email Accounts page.

Field	Value	Description
Subject	string; default: none	Subject of email.
Text message	string; default: none	Email body text. Below this field you can find special codes that begin with the '%' sign. Each code represents a piece information related to the status of the device. Include these codes in the Text message for dynamic information reports.
Execution delay	positive integer; default: none	A period of time (in seconds) which has to pass after a trigger event before the action is executed.
Email account	email account; default: none	Email account used to send the email. Email accounts can be configured in the System → Administration → Recipients → Email Accounts page.
Recipient's email address	email; default: none	Email address(es) of the message's receiver(s).

Type: Output

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Changes the state of a selected output pin.

Field	Value	Description
Execution delay	positive integer; default: none	A period of time (in seconds) which has to pass after a trigger event before this Action is executed.
Control	output; default: Configurable Input/Output (3)	Selects the output controlled by this Action.
Revert	integer; default: 0	After how many seconds the state will revert. If left as 0 or empty the state will not revert.
Maintain	off | on; default: on	When set to 'on', the output maintains its new state after reboot (the state is changed in the config file as well).
Invert	off | on; default: off	Inverts the state of the selected output, i.e., switches the output pin to a state that is opposite to its current one (high-to-low or low-to-high). This can be used instead of specifying a static state.
State copying	off | on; default: off	Copies the state from the selected input and applies it to the selected output. This can be used instead of specifying a static state.
State	High | Low; default: High	Specifies the state of the output pin that will be set by this Action.

Type: HTTP

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Executes a HTTP POST/GET request.

Field	Value	Description
Method	Get | Post; default: Get	HTTP method to be used by this Action.
URL	string; default: none	URL to send the HTTP Post/Get request to.
Verify	off | on; default: off	Verifies the validity of certificates; only used with HTTPS.
Alt. parameters mode	off | on; default: off	Choose a different way to pass parameters. If method is POST parameters are passed in request body. If method is GET parameters are passed throught the URL.
Parameters	string; default: none	Parameters that are to be included the Post/Get request. Select a parameter (right drop-down box) and enter a custom name for it (left text box).
Text message	default: Device name - %rn; Time stamp - %ts	Message to send.
Custom headers	string; default: none	Allows to add custom headers to the HTTP requests.
Execution delay	positive integer; default: none	A period of time (in seconds) which has to pass after a trigger event before this Action is executed.

Type: Script

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Executes a custom, user-written shell script.

Field	Value	Description
Execution delay	positive integer; default: none	A period of time (in seconds) which has to pass after a trigger event before this Action is executed.
Specify path	Upload a script |Specify path; default: Upload a script	Specifies whether the script should be uploaded from an external file or a path to an internal (on this device) script file should be specified.
Custom script | Script file	-(interactive button) | filepath	Shows file upload window on click or provides the possibility to specify a path to an internal script file. The name and selection type of this field depends on the value set in the 'Specify path' field.
Arguments	string; default: none	Optional arguments which can be provided for the script. You can include device information with values given below this input field.

Type: Reboot

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Reboots the device.

Field	Value	Description
Execution delay	positive integer; default: none	A period of time (in seconds) which has to pass after a trigger event before this Action is executed.

Type: Profile

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Switches to using a specified Configuration Profile.

Field	Value	Description
Execution delay	positive integer; default: none	A period of time (in seconds) which has to pass after a trigger event before this Action is executed.
Profile	profile; default: default	Configuration Profile that will be applied by this Action. Configuration Profiles can be defined in the System → Profiles page.

Type: RMS

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Enables or disables RMS service.

Field	Value	Description
Execution delay	positive integer; default: none	A period of time (in seconds) which has to pass after a trigger event before this Action is executed.
Enable RMS	off | on; default: off	Specifies whether RMS service will be enabled or disabled with this action.

Type: MQTT

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Executes a MQTT action.

Field	Value	Description
Text message	string; default: none	Below this field you can find special codes that begin with the '%' sign. Each code represents a piece information related to the status of the device. Include these codes in the Text message for dynamic information reports.
Topic	string; default: none	The name of the topic that the broker will subscribe to.
Client ID	string; default: none	Client ID to send with the data. If empty, a random client ID will be generated.
Hostname	host | ip; default: none	Broker’s IP address or hostname.
Port	integer [0..65535]; default: 1883	Broker's port number.
Keepalive	positive integer; default: none	The number of seconds after which the broker should send a PING message to the client if no other messages have been exchanged in that time
Qos	At most once (0) | At least once (1) | Exactly once (2); default: At most once (0)	A period of time (in seconds) which has to pass after a trigger event before this Action is executed.
Username	string; default: none	Username used for authentication to the Broker.
Password	string; default: none	Password used for authentication to the Broker.
TLS	off | on; default: off	Select to enable TLS encryption.
TLS Type	Certificate based | Pre-Shared-Key based; default: Certificate based	Type of TLS encryption.
Certificate based:Allow insecure connection	off | on; default: off	Allow not verifying server authenticity.
Certificate based:Certificate files from device	off | on; default: off	Choose this option if you want to select certificate files from device.
Certificate based:CA file	.crt file; default: none	Upload CA file.
Certificate based:Certificate file	.crt file; default: none	TLS client or server certificate file.
Certificate based:Key file	.key file; default: none	TLS client or server key file.
Pre-Shared-Key based:Pre-Shared-Key	string; default: none	The pre-shared-key in hex format with no leading “0x”.
Pre-Shared-Key based:Identity	string; default: none	Specify the Identity.

Type: SIM switch

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Switches to using the specified SIM card.

Field	Value	Description
Execution delay	positive integer; default: none	A period of time (in seconds) which has to pass after a trigger event before this Action is executed.
Flip	off | on; default: off	When set to 'on', switches to the opposite SIM card (the that is currently NOT in use). This can be used instead of selecting a specific SIM card to switch to.
Enable primary option transfer	off | on; default: off	Enables simd service to change primary card while switching sims
Target	SIM1 | SIM2; default: SIM1	Selects a SIM card to switch to. This field is visible only when the 'Flip' field is set to 'off'.

Type: SMS

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Sends an SMS message to specified recipients.

Field	Value	Description
Text message	string; default: none	SMS body text. Below this field you can find special codes that begin with the '%' sign. Each code represents a piece information related to the status of the device. Include these codes in the Text message for dynamic information reports.
Execution delay	positive integer; default: none	A period of time (in seconds) which has to pass after a trigger event before the action is executed.
Recipients	Single number | Group; default: Single number	Defines whether the SMS message will be sent to a single number or multiple numbers included in a user-configured Phone group. Phone groups can be configured in the System → Administration → Recipients → Phone Groups page.
Recipient's phone number | Phone group	phone number | phone group; default: none	Phone number of a single recipient or a Phone group of multiple recipients. The name and selection type of this field depends on the value set in the 'Recipients' field.

Conditions

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The Conditions section is used to manage and created Conditions for I/O Juggler Actions. The figure below is an example of the Conditions section, which is empty by default.

To create a new Condition, look to the Add a Condition section; enter a custom name, select the Type of the Condition and click the 'Add' button.

After this you should be redirected to the configuration page of the newly added Condition. You will find descriptions of each different Condition type described on the sections below.

Condition type: I/O

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I/O Condition type tracks the state of a selected input or output pin and considers the Condition as MET if that pin is in a user-specified state.

Field	Value	Description
I/O	inputs/outputs; default: Output(3)	Specifies the I/O pin to which this Condition is listening to.
State	High | Low; default: High	Specifies in what state the pin has to be in in order for the Condition to be met.

Condition type: Analog voltage

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Analog voltage Condition type measures the value of the Analog input and checks whether it inside or outside the user-specified range.

Field	Value	Description
Condition	Inside voltage | Outside voltage; default: Inside voltage	Whether to evaluate the condition as true inside or outside the specified range.
Input	inputs; default: none	Specifies the analog input to which the condition is listening to.
Min voltage	positive float; default: none	Specifies minimum voltage of range.
Max voltage	positive float; default: none	Specifies magimum voltage of range.

Condition type: Boolean group

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Boolean Group will evaluate two or more existing conditions based on selected Boolean type. A Boolean Group condition will considered as MET based on the outcome of the evaluation performed along with one of the available Boolean types:

• AND - all selected conditions evaluate as TRUE.
• NAND - at least one selected condition evaluates as FALSE.
• OR - at least one selected condition evaluates as TRUE.
• NOR - none of the selected conditions evaluate as TRUE.

For example, if we have two time Conditions (hour and minute) and a third Condition of Boolean group: AND, both Conditions 1 & 2 have to be met for Condition 3 to be evaluated as TRUE.

In this case, if at least one condition is no longer met, the Boolean group: AND Condition is evaluated as FALSE.

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Below is an example of Condition type: Boolean group configuration.

Field	Value	Description
Boolean type	AND | NAND | OR | NOR; default: AND	Type of boolean condition.
Add conditions	conditions; default: none	Specifies conditions which have to be met for action to occur.

Condition types: Date/Time

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Lastly, you can configure Conditions based on date and time. Date/time Conditions can be configured based on:

• Minute of the hour
• Hour of the day
• Day of the Week
• Day of the Month
• Day of the Year

Each type can be configured in two distinct ways:

1. Specific time - configured as a single value which defines the exact time when the Condition is considered as TRUE. e.g.:
   • Hour: 8
   • Day of Month: 1
2. Time interval - configured with a start and an end value which define a window of time during which the Condition is considered as TRUE. e.g.:
   • Hours: 8-12
   • Days of Month: 1-12

Impulse Counter

Impulse Counter service can register chages in the `Configurable Input/Output` state of a Power socket when a value is transitioned from low to high, from high to low, or both.

Configuration

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The configuration page is used to enable impulse counter and select GPIO pins for input configuration.

Impulse counter configuration

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Field	Value	Description
Status		Status of service, whether it is currently running.
Enabled	off | on; default: off	Enable impulse counter.
Count store duration	Hour | Day | Week | Month; default: Day	Define for how long the impulse counts are retained, in seconds, before being reset.
Reset counts	-(interactive buttom)	Reset collected impulse counts.

Input configuration

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A Input configuration defines which `Configurable Inputs/Outputs` will be used for impulse counting. Input configuration list is empty by default. Click the 'Add' button in order to create a new Input instance:

You will then be taken to the configuration page for the newly added input:

Field	Value	Description
Enable	off | on; default: on	Enable input configuration.
Name	string; default: none	Name of input configuration.
GPIO pin	Configurable Input/Output (3) | Configurable Input/Output (4); default: Configurable Input/Output (3)	Select GPIO pin for input configuration.
Edge	Rising | Falling | Both; default: Rising	Select the edge option to have the impulse counter increment on the signal`s transition from low to high, high to low, or both.
Debounce	integer; default: 0	Debounce filters out rapid, unintended signals. Set between 0-1000 ms to ensure only stable inputs are registered.

Statistics

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Statistics page displays PIN statistics in routers local time.