What You'll Learn

• How Bluetooth Low Energy (BLE) works with measureQuick and why it differs from classic Bluetooth
• The three connection types measureQuick supports: Direct Connect, App-to-App, and QR Code
• How to pair a BLE smart tool from inside the measureQuick app
• How to confirm a tool is connected and streaming live data
• How to connect multiple tools at the same time
• How to troubleshoot the most common Bluetooth connection failures
• What the Tools screen shows in Demo Mode

What You'll Need

• Device: iPhone, iPad, or Android phone/tablet with measureQuick installed (see Installing the measureQuick App)
• Operating system: iOS 15.0+ or Android 10+
• Bluetooth: Device Bluetooth turned ON in phone/tablet settings
• Permissions: Bluetooth and Location permissions granted to measureQuick
• Smart tool: At least one BLE-compatible smart tool, powered on with charged batteries
• Time: 5-10 minutes to read; 2-5 minutes per tool to pair

Step-by-Step Guide

Step 1: Understand How BLE Works with measureQuick

measureQuick uses Bluetooth Low Energy (BLE), also called Bluetooth 4.0+. BLE is not the same as classic Bluetooth. Key differences:

• Lower power consumption. BLE tools run longer on battery because they transmit smaller data packets.
• Always-on scanning. The app continuously scans for nearby tools without draining your phone battery.
• Multiple simultaneous connections. You can connect 15 or more probes at once. Classic Bluetooth typically handles one device at a time.

BLE handles all direct-connect smart tools in measureQuick. Of the 37 compatible tools, 30 use direct BLE connections.

One connection at a time per tool. Each BLE tool can only connect to one phone or tablet at a time. If your tool is already connected to a coworker's device, it will not appear on yours until they disconnect.

Step 2: Know Your Connection Type

measureQuick supports three connection methods. Most tools use Direct Connect.

This article covers Direct Connect (BLE) pairing. For App-to-App tools, see the individual tool articles (TrueFlow Grid Setup, BluVac Connection). For the full compatibility list of all 37 tools across 17 manufacturers, see Smart Tool Overview.

Step 3: Verify Your Phone Settings

Before opening measureQuick, confirm two things in your phone's system settings.

Bluetooth must be ON:

• iOS: Settings > Bluetooth - toggle ON
• Android: Settings > Connected devices > Bluetooth (or Settings > Bluetooth) - toggle ON

Location permission must be granted:

• iOS: Settings > Privacy & Security > Location Services - verify measureQuick is set to "While Using App"
• Android: Settings > Apps > measureQuick > Permissions > Location - set to "Allow" or "Allow while using the app"

Android requires location permission for BLE scanning. This is an Android OS requirement, not a measureQuick choice. Without it, the app cannot discover nearby tools.

Android permissions screen showing Location and Bluetooth both set to Allow

Step 4: Power On Your Smart Tool

Turn on the smart tool you want to connect. Most BLE tools begin broadcasting immediately when powered on. Some things to check:

• Battery level. Low batteries weaken the BLE signal. Replace or charge batteries if the tool's battery indicator is low.
• Firmware. Some tools require a firmware update from their manufacturer's app before they are compatible with the latest version of measureQuick. Check the tool manufacturer's instructions if you have a brand-new tool.
• Broadcast mode. Most tools broadcast automatically. A few require you to press a button or enter a pairing mode. Check your tool's manual if it does not appear after 10-15 seconds.

Step 5: Open measureQuick and Discover the Tool

1. Open the measureQuick app
2. Navigate to the Tools screen (tap the Tools icon in the bottom navigation bar)
3. The app begins scanning for nearby BLE devices automatically
4. Available tools appear in the list as the app discovers them

Toolbox screen with Scan for Devices and Bluetooth instrument library

You do not need to go into your phone's Bluetooth settings to pair. All pairing happens inside the measureQuick app.

Auto-discovery in workflows. If you start a workflow (A/C Service, Heat Pump, Gas Furnace, etc.) instead of going to the Tools screen, measureQuick scans for tools in the background and connects available instruments automatically.

Step 6: Connect the Tool

1. Tap the discovered tool in the list
2. The app connects and the tool moves from "Available" to "Connected"
3. Live data begins streaming immediately - you will see real-time readings (temperature, pressure, voltage, etc.) on screen

Tools screen showing a connected Fieldpiece probe with live temperature reading

First-time pairing vs. reconnection. The first time you connect a specific tool, the app stores its identity. On subsequent visits, if the tool is powered on and in range, measureQuick reconnects automatically without requiring you to tap anything.

Step 7: Connect Multiple Tools

Repeat Steps 4-6 for each additional tool. measureQuick supports 15+ simultaneous BLE connections. As you add tools, each one appears in the connected instruments list with its own live data stream.

Connected tools are assigned to measurement channels automatically. For example, a temperature clamp on the suction line populates the suction temperature field. You can reassign channels in the Probe Manager (see Probe Manager).

Tools screen showing multiple connected instruments - temperature probes, pressure probes, and a clamp meter - all streaming data

Effective BLE range by manufacturer:

Walls, metal ductwork, and equipment enclosures reduce effective range. Stay within line of sight when possible, especially during initial pairing.

Step 8: Verify the Connection

After connecting your tools, confirm everything is working:

1. Check that each tool shows a live, updating reading on the Tools screen
2. Navigate to your active workflow and verify that measurement fields are populated
3. Look for the probe count indicator - it should match the number of physical tools you connected

Bluetooth icon colors in the Probe Manager screen indicate data freshness:

The further you are from the probes and the more probes you have connected, the slower data arrives. Occasional yellow or orange flashes are normal; sustained red indicates a dropped connection.

If a reading shows "---" or stays static, the tool may have lost its connection. See the troubleshooting section below.

Demo Mode

In Demo Mode, the Tools screen displays simulated connected instruments with sample data. This lets you explore the interface, see how connected tools appear, and practice navigating measurement screens without any physical hardware.

To enable Demo Mode: Settings > Advanced Settings > Demo Mode > ON. Turn it off before running real tests.

Beacon Mode vs. Direct-Connect Mode

Not all BLE probes behave the same way during pairing. The difference between beacon mode and direct-connect mode caused repeated disruption in live training events where multiple technicians were working near each other.

Beacon mode (Fieldpiece probes): The probe broadcasts its signal to any device in range. Multiple phones and tablets can see the probe simultaneously, and whichever device connects first gets it. In a classroom, a busy shop, or a multi-technician job site, this can cause probe "stealing," where someone else's device grabs your probe before you do. Once connected, the probe stops broadcasting and is locked to that device until it disconnects.

Direct-connect mode (NAVAC, TEC DG-8/DG-1000, AccuTools BluVac): The probe pairs one-to-one. Only one device can connect at a time, and the connection is more deliberate. This is more reliable for single-user scenarios, but you cannot share the probe between devices without disconnecting first.

Troubleshooting tip: If your probe keeps disappearing during pairing, check whether another nearby device has already connected to it (common with beacon mode probes). If a direct-connect probe will not pair, verify that a previous session on another device is not still holding the connection. Power-cycling the probe resets the connection state.

Video Walkthrough

• Fieldpiece BLE pairing: - Step-by-step Fieldpiece probe connection (13 min, 26,488 views)

• Fieldpiece getting started: - Adding Fieldpiece probes to measureQuick (12 min)

• Testo BLE pairing: - Testo manifold BLE setup (6 min, 19,776 views)

• Redfish BLE setup: - Redfish multimeter pairing process (7 min, 8,577 views)

• Pairing basics: - General Bluetooth pairing walkthrough (4 min)

• Full workflow with pairing: - Pairing covered in context of a complete diagnostic workflow (72 min, 66,533 views)

Tips & Common Issues

Phone Bluetooth is turned off

The most basic issue. measureQuick cannot scan for BLE devices if Bluetooth is disabled at the system level. Go to your phone's Settings and toggle Bluetooth ON. This is separate from the Bluetooth permission granted to the app.

Location permission not granted (Android)

Android requires location permission for BLE scanning. If you denied this permission during setup, the app will not discover any tools. Fix it: Settings > Apps > measureQuick > Permissions > Location > Allow while using the app.

Tool is already connected to another device

Each BLE tool connects to one phone or tablet at a time. If a coworker's device is connected to the tool, it will not appear in your scan results. The other device must disconnect first, or the other user must close measureQuick. There is no way to force-steal a connection.

Tool battery is low

Low battery weakens the BLE broadcast signal, reducing range and causing intermittent disconnections. If a tool connects and then drops repeatedly, check the battery. Replace or recharge before continuing.

App version is outdated

Newer smart tools may require a recent version of measureQuick for compatibility. If a tool does not appear in your scan and you know it is BLE-compatible, update measureQuick from the App Store or Google Play. Check the release notes for newly supported tools.

Too many Bluetooth devices nearby

In environments with many active Bluetooth devices (busy shops, trade shows, large crews), BLE scanning can slow down. Move closer to your target tool, or turn off tools you are not using to reduce radio congestion.

measureQuick connects and disconnects automatically to save battery

The app manages Bluetooth connections dynamically during workflows. It connects to a tool when the workflow step requires that measurement, then disconnects when the step completes. For example, during a gas furnace workflow, the combustion analyzer connects only when the combustion analysis step activates. You may see brief connect/disconnect activity in the Probe Manager; this is expected and helps extend battery life on both your phone and your tools.

Use the Hold button when moving between indoor and outdoor units

If you lose Bluetooth signal moving between indoor and outdoor equipment (common in multi-story buildings or long distances), use the Hold button on the measurement screen to freeze current readings. Capture your outdoor measurements, tap Hold, walk to the indoor unit, then capture indoor measurements. Clear the hold when you return within range. This avoids losing data when you step out of BLE range.

Tool firmware needs an update

Some manufacturers release firmware updates that affect BLE compatibility. If a known-compatible tool will not connect, check the manufacturer's app for a pending firmware update. Fieldpiece, Testo, and NAVAC each have their own companion apps for firmware management.

iOS: Background App Refresh disabled

On iOS, if Background App Refresh is turned off for measureQuick, the app may not reconnect to tools automatically when you switch back to it after using another app. Enable it: Settings > General > Background App Refresh > measureQuick > ON.

Android: Battery optimization interfering

Android's battery optimization can kill measureQuick's background BLE scanning. If tools disconnect when your screen turns off, disable battery optimization for measureQuick: Settings > Apps > measureQuick > Battery > Unrestricted (or "Not optimized," depending on your Android version).

Tool appears in scan but will not connect

Try these steps in order:

1. Power-cycle the tool (turn it off, wait 5 seconds, turn it back on)
2. Close and reopen the measureQuick app
3. Toggle your phone's Bluetooth off and back on
4. Restart your phone

If none of these work, the tool may have a hardware issue. Contact the tool manufacturer's support.

Related Articles

Prerequisites (complete these first):

• Installing the measureQuick App
• Smart Tool Overview

Follow-up articles (next steps after this one):

• Fieldpiece SmartManifold
• Fieldpiece HS36 / HS37
• Probe Manager
• Bluetooth Troubleshooting

Related in the same domain:

• ALL BT PROBES Reference

Need Help?

If you get stuck or this article does not answer your question:

• Check the Related Articles section above
• Watch the video walkthroughs linked above for visual guidance
• Contact measureQuick support: support@measurequick.com