What is Gravio?

Introduction » What is Gravio?

Gravio is a platform that connects IoT devices with software and artificial intelligence. It is built for companies who like to start small and quickly, and yet have the possibility to scale up robustly and fast. Other than most IoT platforms Gravio leverages the…

Gravio Hub

Gravio Hub

For the Gravio Standard package or higher, you get one or more Gravio Hubs. The Gravio Hub is the Edge Device that gathers all the data and processes. It is essentially a small computer. The specifications of the Gravio Hub are below: CPU: Rockchip RK3399 (6 core)…

About Gravio Hub and Gravio Zigbee Receiver

Appendix » About Gravio Hub and Gravio Zigbee Receiver

The maximum number of devices that can be connected to the Gravio Hub and Gravio Zigbee receiver is 64.

General Gravio Troubleshooting

Troubleshooting » General Gravio Troubleshooting

Symptom Explanation Remedy Comments Gravio Studio is not behaving as expected Gravio Server connection is unstable or Gravio Server is not running Ensure that there is a stable connection between Gravio Studio and the Server is…

Gravio Apps Framework

Gravio Apps Framework

Gravio will also provide a framework, that allows third party companies to build native mobile applications that integrate seamlessly into the Gravio Edge infrastructure. APIs provided by Gravio’s edge servers can provide data or be triggered by an authenticated…

Gravio HubKits Overview

Gravio HubKits Overview

The Gravio’s HubKit Lists view in Gravio gives you an overview of all connected Edge HubKits available. These can be software servers from Linux, Windows or Macs where you have installed the Gravio HubKit, or they can be Gravio Hub devices. For information on how…

Restricting access to the Gravio Hub from Gravio Studio

Appendix » Restricting access to the Gravio Hub from Gravio Studio

To restrict Gravio Studio access to the Gravio Hub, install the Gravio Studio client certificate used for the that particular Gravio Hub. Note: This feature is only available for Basic users. Log in to Gravio Cloud with Gravio Studio and select “Client…

Stopping the Gravio Hub

Gravio Hub » Stopping the Gravio Hub

Please shut down the Gravio Hub by pressing and holding the button next to the plug. Keep pressing the button until the Logo has cycled through Blue, then Yello, Red. Once on red, please release the button. The logo will turn off. Once the light is off, it means your…

Gravio HubKit Data Directory

Appendix » Gravio HubKit Data Directory

When the Gravio HubKit is installed, it creates a data directory to store configuration files and data. On Windows 10 C:\ProgramData\HubKit\ On macOS /Library/Application Support/HubKit/ On Linux/Raspberry On Linux/Raspberry, the following directories are mounted…

Using the Gravio Coordinator

Advanced » Using the Gravio Coordinator

Because Gravio is a distributed system consisting of either computers (macOS, Windows or Linux) running the HubKit or the Gravio Hub itself, there is a need to coordinate those edge nodes. More information about the Gravio Coordinator can be found in the Gravio…

Which ports does Gravio require?

Appendix » Which ports does Gravio require?

We use the following Ports in each daemon in HubKit Process Name Protocol Port Gravio Control Manager HTTPS 29442 When installing HubKit and Gravio Studio on a different PC, one of these port numbers, “Gravio Control…

Gravio Hub Led Light Status Indicators

Gravio Hub » Gravio Hub Led Light Status Indicators

The Gravio Logo on the Gravio Hub can light up in various colours and patterns. Here you can find what the colours mean and/or how you can trigger them. LED behaviour Context Meaning Comment Solid Blue Upon boot Out of the box…

Getting Started with the Gravio Hub

Gravio Hub » Getting Started with the Gravio Hub

On this page, we will go through the process of setting up your Gravio Hub. We made it extremely simple to configure your new hub. The following two steps are needed to get started: Configure the Gravio Hub to connect to your WiFi network Set your password The…

Connecting your Gravio Hub to the Network

Gravio Hub » Connecting your Gravio Hub to the Network

The Network Setup Process The first time you plug the Gravio Hub into a power source, it will create a wireless network. Use any device with a browser to connect to that Wifi Network: Log in using the password graviohub Now open your browser and enter the URL…

How to install Gravio server Root CA certificates.

Appendix » How to install Gravio server Root CA certificates.

In order to make the secure connection, you will need to install the downloaded certificates to your operating system. HubKit can then verify that you are allowed to access it. Installing the Certificate on Windows 10 Double click on the certificate file from…

How to Side-Load Gravio Studio for Windows

Appendix » How to Side-Load Gravio Studio for Windows

Sideloading procedures for Gravio Studio for Windows Sideloading is the process of installing an application from an installer file rather than from the App Store. In some cases, for example in a corporate environment, the App store may not be available. Or a computer…

Introduction

Introduction

Welcome to Gravio 4! Gravio 4th generation of the Gravio platform that connects IoT devices, sensors and other input devices. Gravio is built for companies who like to start small and quickly, and yet have the possibility to scale up robustly and fast. Other than most…

Software Sensors

Introduction » What is Gravio? » Hub Configuration View » Device Tab » Software Sensors

Gravio also supports software sensors. An example for a software sensor could be a camera that detects how many people are in a room and triggers certain Actions if certain thresholds are reached. These sensors are created using software and artificial intelligence…

Setup on macOS

Introduction » Installation and Setup » Setup on macOS

Mac To use Gravio on Mac, you can install Gravio HubKit on your Mac. And you can install Gravio Studio for Mac for managing your Gravio HubKit. Run Gravio HubKit for Mac First, please download the Gravio HubKit dmg for Mac from this link. This is the Edge…

Service Architecture

Introduction » Service Architecture

Gravio consists of the following application modules: Gravio Studio, a Windows, macOS and iOS application to view, edit and configure the server infrastructure. Gravio HubKit, a server software installed on the edge device (Windows, macOS or Linux) to retrieve…

Setup on Windows 10

Introduction » Installation and Setup » Setup on Windows 10

Windows 10 Installation Install Gravio Studio from the Microsoft store: https://www.microsoft.com/store/apps/9N5ZLBCTTTH2 Launch Gravio Studio If you don’t have an account already, create an account here by filling out this form and agreeing to the terms and…

Writing Image Inferences

Advanced » Writing Image Inferences

One of the big new features of Gravio 4 is the way you can create inference files to use Artificial Intelligence and Machine Learning to detect objects in visual feeds, such as from CCTV security camera systems based on ONVIF. Please refer to the ONVIF section of this…

Performance Tuning

Gravio Hub » Performance Tuning

When using the Gravio Hub for inference computer vision detection, please consider the following: Processing Performance When an inference is selected as a “layer as a soft sensor” on a Gravio Hub, only one model should be used per Gravio…

GravioDistance

Action Configuration View » Action Components » GravioDistance

The Gravio Distance component allows you to retrieve distance measurements from the Gravio Laser Distance sensors. To use this component you must have paired the Gravio Laser Distance sensor beforehand. If the Device ID property is empty, the command will be sent to…

GravioMatrix

Action Configuration View » Action Components » GravioMatrix

The Gravio Matrix component allows you to set text or an image to a Gravio Matrix. To use this component, the Gravio Matrix must be paired beforehand. If the Device ID property is empty, the command will be sent to all connected Gravio Matrices.   Output…

Regular Expression Functions

Action Configuration View » Functions » Regular Expression Functions

The following functions are available. Function Name Arguments Description Example RegExpMatch RegexMatch(re, s) Returns a Bool to see if the regular expressions re and s match RegexMatch(“G.*o”, “Gravio…

Adding Physical Sensor Devices

Introduction » What is Gravio? » Hub Configuration View » Device Tab » Adding Physical Sensor Devices

Gravio is built in a way that allows us to easily extend new sensor families. On the website https://www.gravio.com/product#Gravio-Rent you can see a range of hardware sensors Gravio supports off the shelf. If you require other sensors to be connected, please do not…

Security and Authentication

Security and Authentication

If you have Gravio Standard or better, you can secure your Gravio HubKit against your Gravio Studio machine using a Client Authentication method. This means you install a certificate on your Gravio Studio machine, which will be used on the Gravio HubKit server to…

Device Tab

Introduction » What is Gravio? » Hub Configuration View » Device Tab

In the Devices tab, you manage the devices connected to a HubKit by adding, removing and configuring them, including their physical location. In order to keep the data stores organised and efficient, Gravio features two dimensions how to place and assign…

GravioLight

Action Configuration View » Action Components » GravioLight

The Gravio Light Action Component is to control a Gravio Lights. For this component to work, you must have the Gravio Lights paired in advance. Output Payload Description cv.Payload Outputs the output payload of the previous component…

Action Configuration View

Action Configuration View

The Gravio HubKits can trigger Actions. You can think of an Action like a small and simple computer program, that’s made up of Steps. Actions can be created in the Action Editor which can be opened by clicking on the Action Editor icon: You can find these…

Zigbee Firmware Update

Appendix » Zigbee Firmware Update

dongle is shown below. Download the firmware from Here 1. When using a Mac Prepare a Mac with the Gravio HubKit4 installed. Plug the Zigbee dongle into the USB port of your Mac and launch the terminal. Insert the dongle with the Gravio logo on the top. In Terminal…

Maintenance and Software Updates

Gravio Hub » Maintenance and Software Updates

Once logged in, you can open the “Maintenance” tab on the top left to open the maintenance view: Once open, you see the following sections: Check Updates SSL Certificate Settings HubKit and Coordinator Data Backup Gravio Hub Power Management …

Settings Tab

Introduction » What is Gravio? » Hub Configuration View » Settings Tab

In the Settings tab you can manage various settings aspects such as view the hubkit’s versions, backup or restore, set the base property profiles, deploy image inference models or view the disk usage space. If you have the enterprise version, you can also connect…

Saving Media data path for Camera device

Appendix » Saving Media data path for Camera device

Images acquired from the camera by ONVIF, etc. will be stored in the following directory for each camera device and stored in each date directory. Windows 10 C:/ProgramData/HubKit/mediadata Mac /Library/Application…

Exec

Action Configuration View » Action Components » Exec

The RunScript component allows you to run OS standard scripts. If Gravio Server is running on Windows it can run batch files, Linux, Raspbian and macOS can run shell scripts. If it is not Windows, you need to give execute rights to the uploaded file. The uploaded…

Note Regarding CO2 Sensors

Appendix » Note Regarding CO2 Sensors

It takes about 20 minutes after the data is received for Gravio CO2 to obtain a stable value of CO2 in the environment concerned.

Adding an EnOcean Sensors

Introduction » What is Gravio? » Hub Configuration View » Device Tab » Adding Physical Sensor Devices » Adding an EnOcean Sensors

We also rent out EnOcean energy harvesting sensors, that are getting powered by the energy surrounding them, such as solar panels, or by kinetic energy, e.g. when buttons are pushed. We have two types of sensors: The temperature sensors, identifiable by the small…

Available Variables in Actions

Action Configuration View » Available Variables in Actions

Think of the Action Steps as connectable parts that have an input and an output pipe. Each Step waits for incoming objects (in cv.Payload) it can then process and pass on through the output pipe to the next Step. Before processing the Step, you can Pre-Map and after…

How to write expressions in Pre Mappings / Post Mappings

Action Configuration View » How to write expressions in Pre Mappings / Post Mappings

Each action component in the Action Editor has a pre Pre Mappings / Post Mappings area on the right side of the screen: Press the “+” button to add a new line to either the Pre-Mappings or the Post-Mappings. Pre Mappings are executed before the main…

Using the File Viewer

Action Configuration View » Using the File Viewer

Some action components in HubKit are able to read files in the actmgr/data directory and save files in that directory. Files stored in this directory can be retrieved by Gravio Studio, and local files can be uploaded to the directory by Gravio Studio. Use the…

Log Viewer Tab

Introduction » What is Gravio? » Hub Configuration View » Log Viewer Tab

In the Log Viewer tab you can access or download the log files that Gravio produces. They are mainly used for debugging. The logs include: Actmgr – containing any logs the Actions and Steps produce Blemgr – Bluetooth related logs Ctrlmgr –…

Troubleshooting

Troubleshooting

In this section we talk about how to identify and rectify issues with Gravio.

Installation and Setup

Introduction » Installation and Setup

System Requirements: The requirements for Gravio 4 are: Windows: Windows 10 1903 or higher Intel-based 64 bit CPU 2 Core or higher 4GB RAM or more macOS: macOS 10.15 or higher 8 GB RAM or more Linux: Ubuntu 18.04 LTS Intel-based 64 CPU 2 Core or…

Setup on Linux / Raspberry Pi

Introduction » Installation and Setup » Setup on Linux / Raspberry Pi

Linux / RaspberryPI Download the Linux docker files as zip package from download site. Connect to Ubuntu 18.04 LTS using SSH. Transfer the downloaded zip package (coordinatorsetup_linux_v4_2.zip) to Ubuntu. Execute the following Command from Console. sudo apt…

Adding a compatible Bluetooth device

Introduction » What is Gravio? » Hub Configuration View » Device Tab » Adding Physical Sensor Devices » Adding a compatible Bluetooth device

Use Gravio Studio to connect the sensor receiver and layer of a Bluetooth-enabled device. Under “Devices”, select the type of Bluetooth sensor you want to use (DataKind) and add a new area and layer.    As a sample, use OMRON’s 2JCIE-BU01 to…

PhilipsHue

Action Configuration View » Action Components » PhilipsHue

The Philips Hue Action Component is to send commands to a Philips Hue light device. You need to specify the color and opacity and set the IP address, user ID, and light ID. The IP address can be found by going to https://discovery.meethue.com/. With this…

Google Cloud MQTT

Appendix » Google Cloud MQTT

Here are some examples of how you can publish messages to the Google Cloud MQTT system Go to the Google Cloud console and create a project: Moving to the IoT core on Google Cloud Platform Enable the Google IoT Core API. Create a device registry Enter…

Hub Configuration View

Introduction » What is Gravio? » Hub Configuration View

If you double click on the upper half of the Server card, you will get to the Hub Configuration view: At the top you can find a number of buttons such as: A plus sign button to create new physical Areas to group your Layers An edit button to edit an Area or…

MQTT Publish

Action Configuration View » Action Components » MQTT Publish

The MQTT Publish Action Component allows you to publish messages to topics within an MQTT PubSub system. Output Payload Explanation cv.Payload Outputs the output payload of the previous component as is. (Pass through) Component…

MQTT Subscriptions

Introduction » What is Gravio? » Hub Configuration View » Device Tab » MQTT Subscriptions

You can subscribe to topics from an MQTT broker. These incoming messages would then be treated like sensor input data. To create an MQTT layer, click on the MQTT button on the top right of the screen: This will open the overview of your available MQTT Brokers. You…

WriteToExcel365

Action Configuration View » Action Components » WriteToExcel365

The WriteToExcel365 component can output data to a OneDrive in Excel format. The use of this component requires a contract and pre-configuration of Office365 for Business and OneDrive for Business. How to prepare your Microsoft account Prepare an Office365…

Time Based Triggers

Introduction » What is Gravio? » Hub Configuration View » Trigger Tab » Time Based Triggers

You can create triggers that are based on times on time-related parameters such as intervals, weekdays, day-of-month, etc. To create a time-based trigger, open the +-icon with the clock on the trigger tab: You will see the following dialogue box: Give your…

Sensor Event Triggers

Introduction » What is Gravio? » Hub Configuration View » Trigger Tab » Sensor Event Triggers

Sensor Triggers Click on the icon on the top right with the plus in the square to create a sensor-based trigger: This will open the trigger popup: Give your trigger a sensible name, we recommend to name it after the condition that triggers the…

Action Component Behavior

Action Configuration View » Action Component Behavior

The action component has two component variables (cv.): the input payload (cv.Payload) and the output payload (cv.Payload). You can use it as the input payload (cv.Payload) when used in Pre-Mapping and as the output payload (cv.Payload) when used in…

Date Functions

Action Configuration View » Functions » Date Functions

The following functions are available. Function Name Arguments Description Example Now Now([timezone]) Returns the date and time type for the current date and time. Year Year(t[, timezone]) Returns the…

Encode Functions

Action Configuration View » Functions » Encode Functions

The following functions are available. Function Name Arguments Description Example URLPathEscape URLPathEscape(s) Escaping s to a string that can be safely placed in a URL path segment URLPathEscape(“test1?test2…

String Functions

Action Configuration View » Functions » String Functions

The following functions are available. Function Name Arguments Description Example Len Len(s) Returns the length of a string (in bytes). s returns the number of elements if s is an array or an object. …

CSVRead

Action Configuration View » Action Components » CSVRead

The CSV Read component takes CSV data as input, parses it and creates an output payload in the format specified by the Output Format component property (cp.Output). CSVRead has an “Input” property (cp.Input), which allows you to select the data source.…

Debug Log

Action Configuration View » Debug Log

Press the button at the top left of the component to output the debug log. By nature, components run independently and in parallel, but when executing an action while outputting debug logs, they are synchronized within the action engine. The debug log outputs the…

Sensor Data DB If Zero

Action Configuration View » Action Components » Sensor Data DB If Zero

The SensorDataDBIfZero component outputs the input payload as the output payload if no rows are retrieved; if any rows are found, it outputs nothing. With the content specified in the property, it searches the sensor DB and executes a filter expression for each matched…

Split

Action Configuration View » Action Components » Split

The Split component is a component that splits the input Payload by line feed if it is a string, or by element if it is a JSON array, and passes it to the next component. The Split component provides the ability to filter whether the output data after the split…

SensorDataDB

Action Configuration View » Action Components » SensorDataDB

The Sensor Data DB Action Component is to read from the Sensor Data DB. Each recorded piece of data gets stored in the Sensor Data DB. With this component, you can query that database. The SensorDataDB component queries data from the SensorDataDB stored in HubKit and…

HTTP Request

Action Configuration View » Action Components » HTTP Request

Using the HTTP Request component, you can send an HTTP request to a specified URL. The HTTP Request component executes the HTTP request with the input payload as the Body content of the HTTP request, depending on its properties, and writes the HTTP response Body to…

AqaraSmartPlug

Action Configuration View » Action Components » AqaraSmartPlug

The Aqara Smart Plug Action Component is to control an Aqara smart plug device. To use this device, you must have the Aqara Smart Plugs paired in advance. Output Payload Description cv.Payload Outputs the output payload of the previous…

Data Viewer Tab

Introduction » What is Gravio? » Hub Configuration View » Data Viewer Tab

The Data Viewer Tab allows you to investigate incoming sensor data in real-time (press the “live” button on the top right for real-time live data). This is useful if you want to set up the system and test its functionality. Please click on the…

TwilioSMS

Action Configuration View » Action Components » TwilioSMS

The Twilio SMS Action Component is to send an SMS text message via Twilio. It is useful to notify people of information from sensors. Component Properties Name Required Description To True The number to send the message to,…

Sleep

Action Configuration View » Action Components » Sleep

The Sleep Action Component is to insert a pause between the two steps of the action. Output Payload Description cv.Payload Outputs the output payload of the previous component as is. (Pass-through) Component…

Mail Send

Action Configuration View » Action Components » Mail Send

The Mail Send Action Component is to send email via SMTP. The Mail Send component sends an input payload (cv.Payload) as the body of a mail. It converts the data received by the input payload into a string and sends it as the body of an email. After sending the…

Trigger Variables and Properties

Introduction » What is Gravio? » Hub Configuration View » Trigger Tab » Trigger Variables and Properties

Device / timer triggers allow you to pass trigger properties and trigger variables as arguments when performing an action. Trigger variable The trigger variable is a variable in tv., which is passed to the action as tv. In an event-driven trigger by receiving sensor…

Sound Effect

Action Configuration View » Action Components » Sound Effect

The Sound Effect Action Component is to play a sound effect. Output Payload Description cv.Payload Outputs the output payload of the previous component as is. (Pass-through) Component…

Referring to the value of a Object variable in an Action

Action Configuration View » Referring to the value of a Object variable in an Action

If you like to refer to the value of a variable of type Object available in an action, you can access the element with a selector or square brackets connected to the variable with a dot. As an example of an Object type variable, if you use IVAR’s face…

LINE Notify

Action Configuration View » Action Components » LINE Notify

The LINE Notify Action Component is to send a notification via the LINENotify service (https://notify-bot.line.me/). It’s useful to notify people of information from sensors. Component Properties Name Required Description Message …

Statistics

Action Configuration View » Action Components » Statistics

The Statistics component stores the statistics (Min, Max, Mean/Average, Median, Standard Deviation, Sum, Mode) in the component variables with the specified values. If the value specified is an improper value for a number, that value will be excluded from the…

Filter

Action Configuration View » Action Components » Filter

The Filter component is a component that filters the data that passes the contents of the input payload to the next component and outputs it to the output payload. You can enter a conditional expression that allows you to pass a test if it’s true, or…

Writing an Action

Action Configuration View » Writing an Action

Double-clicking on your Action in the Actions Overview will open your Action Editor. This is where you put your actions together. Actions consist of separate steps which you can string together, create “decision trees” and create inputs and outputs. The…

AWS S3 Download

Action Configuration View » Action Components » AWS S3 Download

The AWS S3 Download Action Component is to download content from Amazon AWS S3. Component Properties Name Required Description Output True Specify whether to keep the content in the Payload variable of the Action or as a file.…

MSTeamsPostMessage

Action Configuration View » Action Components » MSTeamsPostMessage

The MSTeamsPostMessage action component can use the Microsoft Teams API to post a message to the channel specified in the component’s properties. How to get the Incoming Webhook URL: Select “Connector” from the “More Options” menu…

Amazon Polly Speech

Action Configuration View » Action Components » Amazon Polly Speech

The AWS Polly Speech Action Component is to read out text using AWS Polly text-to-speech. Amazon Polly converts input text into life-like speech. This functionality can also be useful for debugging purposes. Note that this functionality may not be available for…

Template

Action Configuration View » Action Components » Template

The Template component is a component that generates a string (text) from a specified template using placeholders. The template syntax is a GoLang standard described on https://golang.org/pkg/text/template/ . tp. / tv. / ap. / av. / cp. / cv. are all referable to…

Join

Action Configuration View » Action Components » Join

The Join Action Component is to join multiple inputs into an array. Output Payload Description cv.Payload Combined array Component Properties Name Required Description Capacity False Specifies how…

Functions

Action Configuration View » Functions

Functions available on the right-hand side of expressions in Pre Mappings / Post Mappings are described separately in this section. A simple example of using a function is the usage of the Now function to output the current date, like in this example that writes this…

CSVWrite

Action Configuration View » Action Components » CSVWrite

CSV Write generates a CSV with the input payload as input. The input payload can be an array of JSON arrays or an array of JSON objects. Otherwise, it will be converted to a string and output as a CSV with one line and one column. Input Payload Example…

File Read

Action Configuration View » Action Components » File Read

The File Read Action Component is to read a file. Component Properties Name Required Description Filename False Filename of the file to be read. The file has to be inside these folders: On Windows:…

Slack Post Message

Action Configuration View » Action Components » Slack Post Message

The Slack Post Message Action Component is to post a message to Slack using the Slack API. It can be useful to debug Actions or notifying people. It can be used for sending messages to #channels as well as @people . Component…

File List

Action Configuration View » Action Components » File List

The File List Action Component is to get a list of files that match the pattern. Component Properties Name Required Description Pattern True Pattern IncFILE False Include Files IncDIR False …

File Delete

Action Configuration View » Action Components » File Delete

The File Delete Action Component is to delete a file. Component Properties Name Required Description Filename False Filename All True All. The value of cp.All can be either “true” or “false…

PATLITE

Action Configuration View » Action Components » PATLITE

The Patlite Action Component is to control a PATLITE network device including audio. The watchtower must support HTTP commands. For more information, please visit the Patlite website. https://www.patlite.co.jp/ PATLITEs are useful to control the display according to…

File Write

Action Configuration View » Action Components » File Write

The File Write Action Component is to write data to a file. Component Properties Name Required Description Filename False Filename to be written. Append True Append new data instead of replacing the file.…

Google Analytics Send Event

Action Configuration View » Action Components » Google Analytics Send Event

The Google AnalyticsSendEvent component sends events using the Google Analytics Measurement Protocol. For details of Measurement Protocol and parameters, please refer to this link. Checking “Debug Mode” puts you in debug mode. In debug mode, if…

AWS S3 Upload

Action Configuration View » Action Components » AWS S3 Upload

The AWS S3 Upload Action Component is to upload content to amazon aws s3. Component Properties Name Required Description Input True Upload a payload or a file. To set the value of cp.Input, use either “Payload” or…

Credits and Attributions

Appendix » Credits and Attributions

Software Libraries Used Under BSD-2-Clause License github.com/godbus/dbus github.com/pkg/errors Under BSD-3-Clause…

JSONPath() Usage Examples

Action Configuration View » Functions » String Functions » JSONPath() Usage Examples

This section describes an example of using JSONPath(). If the sensor data (cv.Payload) or the argument of the action to be executed in the trigger condition (tv.Data) is in JSON format, you can use JSONPath() to refer to the value. Sample Data { "store": { …