BlueLab Connect Stick 2

The Bluelab Connect Stick 2 (model CONSTICK2) is the USB ZigBee gateway that wirelessly receives pH, EC, and temperature readings from up to 50 Bluelab Connect-series monitors and controllers and logs them in real time on a Windows, macOS, or Linux PC running the free Bluelab Connect desktop software. With an external screw-on antenna, a 3 m/10 ft USB cable for high-wall mounting, and ZigBee 2.4 GHz wireless range up to 100 m indoors (or 700 m with a Range Extender 2), the Connect Stick 2 is the central hub for any grower running multiple Bluelab Connect devices across a room, greenhouse, or multi-room facility.

Bluelab Connect Stick 2 Specifications

The Connect Stick 2 is a USB-powered ZigBee coordinator built specifically for Bluelab’s Connect product line. It does not use Wi-Fi, Bluetooth, or any cloud service — the wireless link runs on the 2.4 GHz ISM band over ZigBee, and data is logged locally to the host computer through the free Bluelab Connect desktop software. The table below summarises the headline specifications confirmed by the official Bluelab datasheet and support documentation.

Specification	Value
Manufacturer	Bluelab (New Zealand)
Model number	CONSTICK2 (HTG SKU: TST-BL-GCS)
Wireless technology	ZigBee on the 2.4 GHz ISM band (not Wi-Fi, not Bluetooth)
Indoor wireless range	Up to 100 m / 330 ft typical in a growing environment
Open-space range	Up to 400 m / 1,312 ft line-of-sight
Extended range	Up to 700 m / 2,300 ft with Range Extender 2
Max paired devices	50 Bluelab Connect devices per Connect Stick 2
Power supply	5V USB from the host computer (no separate adapter)
USB cable length	3 m / 10 ft (allows high-wall positioning)
Antenna	External, screw-on (clockwise); position vertically
Status indicators	Orange LED (power), Blue LED (signal activity)
Mounting	Wall-mount via screws or free-standing on a surface
Operating temperature	0–50°C / 32–122°F
Software	Free Bluelab Connect desktop app (Windows 7 SP1+, macOS 10.8.3+, Linux with Java 8+)
Activation	4-digit key code entered in Bluelab Connect software
Data logged	pH, electrical conductivity (EC), and temperature

Why Choose the Bluelab Connect Stick 2

The Connect Stick 2 solves a specific problem: walking from monitor to monitor in a multi-room or multi-bench grow to write down pH, EC, and temperature readings by hand. Once paired, every Bluelab Connect-series device in range streams its readings continuously to your computer, building a live picture of every reservoir and zone at once and a historical log for compliance, troubleshooting, and dial-in work. A few practical reasons growers pick the Connect Stick 2 over alternatives:

• Up to 50 devices on one stick. A single Connect Stick 2 acts as the ZigBee coordinator for as many as fifty Bluelab Connect monitors and controllers paired to the same Bluelab Connect software install. Whether you are running two Guardian Monitors over a pair of reservoirs or a couple of dozen pH and Pro controllers across a commercial facility, one USB stick on one PC remains the entire data-logging infrastructure.
• Improved antenna over the original Connect Stick. The screw-on external antenna on the gen-2 stick is a meaningful upgrade from the internal antenna on the original Connect Stick. Positioned vertically and mounted high, it covers the typical indoor grow with margin to spare — 100 m indoor range or up to 400 m line-of-sight in open space.
• 3 m / 10 ft USB cable lets you mount the stick where the signal lives. Wireless range is dominated by what is between the transmitter and the receiver. The long USB cable means you can mount the stick high on a wall, clear of the canopy, metal benches, and concrete walls, while the host PC stays on the desk where you want it.
• Range Extender 2 compatibility scales to commercial facilities. When a single building is too large for the stick to cover directly, the Bluelab Connect Range Extender 2 hops the ZigBee mesh through walls, floors, and other obstructions, taking the working range out to 700 m / 2,300 ft. The system grows with your facility instead of forcing you to start over.
• Local logging, no cloud account required. The Bluelab Connect desktop software stores data on the host PC. There is no monthly subscription, no Wi-Fi credentials to manage, and no third-party cloud dependency. For growers in facilities without reliable internet, or who simply prefer to own their data, the local-first model is a real advantage.
• Plug-and-play USB. The stick draws 5V from a standard USB port. There is no separate power adapter to lose, no battery to replace, and no router configuration. Plug the stick into a USB port, run the Bluelab Connect software, enter the 4-digit key code, and you are paired.

Best Uses for the Connect Stick 2

The Connect Stick 2 is a gateway, not a sensor — it shines when paired with one or more Bluelab Connect-series monitors or controllers feeding it data. The following are the most common scenarios growers buy it for.

• Commercial greenhouse and indoor-farm data logging. Operations running several Bluelab Guardian Monitors, pH Controllers, or Pro Controllers across multiple rooms or benches use the Connect Stick 2 to centralise every reading into one log file on one PC. Continuous pH, EC, and temperature records make compliance audits and quality-control reviews straightforward.
• Multi-room cannabis and vertical farms. Where rooms are separated by walls, doors, or floors, the ZigBee link and Range Extender 2 compatibility let one stick serve a building that a Wi-Fi sensor mesh would struggle with. Walls and dense canopy still attenuate the signal — that is why the stick is meant to be mounted high — but the standard 100 m indoor range covers most single-building grows comfortably.
• Upgrade path from the original Connect Stick. Growers running an existing fleet of Bluelab Connect devices on the gen-1 stick gain the improved range and the external screw-on antenna by dropping in the Connect Stick 2. The Bluelab Connect software install and the paired devices remain unchanged.
• Pairing with the Bluelab Guardian Connect In-line and Bluelab pH Controller 2. Both of these Premier Hydro-stocked devices are Connect-family hardware that pair to the Connect Stick 2 by 4-digit key code; once paired, their pH, EC, and temperature readings stream into the desktop software alongside every other Connect-series device on the same stick.
• Local-only data logging for off-grid or air-gapped sites. Operations where Wi-Fi is unavailable, restricted, or undesirable benefit from the stick’s dedicated ZigBee network. The system has no dependency on the facility’s internet connection and runs entirely on local USB power and a local desktop app.
• Historical trend analysis for nutrient and irrigation tuning. Continuous logging lets a grower correlate pH drift, EC swing, and reservoir temperature against irrigation events, dosing schedules, and weather. The dataset is far richer than spot readings written on a clipboard, and it surfaces slow drift before it becomes a crop problem.

Connect Stick 2 vs Guardian Monitor Wi-Fi and Trolmaster Hydro-X

The Connect Stick 2 is a USB-attached ZigBee gateway that funnels readings from Bluelab’s Connect-series hardware into a local desktop app. Two alternative approaches solve broadly similar logging problems with different architectures.

Bluelab Guardian Monitor Wi-Fi is Bluelab’s Wi-Fi-native monitor that sends data directly to the cloud via the Edenic app, removing the need for a Connect Stick at all. The trade-off is that each Wi-Fi monitor needs a reliable Wi-Fi connection at its installation point, the data lives in a cloud account rather than on a PC you control, and the device sits at a higher price point per monitoring location. If you are starting fresh and you want cloud dashboards on your phone with no on-site PC, the Wi-Fi route is simpler; if you already own Connect-series hardware, or you prefer local-only logging with a fleet of meters on one gateway, the Connect Stick 2 is the more cost-effective path.

Trolmaster Hydro-X Pro is a competing grow-environment controller with its own built-in Wi-Fi data logging and sensor ecosystem. It is a controller-first platform rather than a meter-first platform, and it operates on Wi-Fi rather than ZigBee. Trolmaster makes sense if you want a single hub that integrates climate control, lighting, and CO₂ alongside reservoir monitoring; the Connect Stick 2 makes sense if you specifically want to centralise pH, EC, and reservoir-temperature data from a fleet of Bluelab Connect-series meters and controllers without taking on a new controller platform.

Choose the Connect Stick 2 if you already run, or plan to run, multiple Bluelab Connect-series devices and you want one local log file with no cloud dependency. Choose the Guardian Monitor Wi-Fi if you want cloud-based monitoring through the Edenic app and you only need to monitor one or two reservoirs. Choose a Trolmaster-style controller if reservoir logging is one small piece of a wider grow-room automation buy.

Compatibility & System Requirements

The Connect Stick 2 is purpose-built for Bluelab’s ZigBee-based Connect product line. It will not pair with Wi-Fi-native Bluelab devices (for example, the Guardian Monitor Wi-Fi) and it does not communicate with non-Bluelab sensors. The following compatibility notes cover the most common questions growers ask before they buy.

Compatible Bluelab Connect devices. The Connect Stick 2 acts as the USB ZigBee coordinator for the Bluelab Guardian Monitor Connect, the Bluelab Guardian Monitor In-line Connect (sold at Premier Hydro as the Bluelab Guardian Connect In-line), the Bluelab pH Controller Connect, the Bluelab Pro Controller Connect, the legacy Bluelab Connect Range Extender 1, and the Bluelab Connect Range Extender 2. Up to 50 devices from this list can be paired to a single Connect Stick 2.

Not compatible. Wi-Fi-native Bluelab products such as the Guardian Monitor Wi-Fi do not use ZigBee and therefore cannot be paired to the Connect Stick 2; those devices log directly to the Edenic cloud app instead. Non-Bluelab pH and EC meters cannot be added to the Bluelab Connect ZigBee network.

Host PC requirements. The Bluelab Connect desktop software runs on Windows 7 SP1 or later, macOS 10.8.3 or later, or most Linux distributions that support Java 8 or newer. The software is a free download from bluelab.com. The PC must have a free USB port (USB 2.0 or later) to host the stick and must remain powered on whenever you want continuous logging — if the PC is asleep, the ZigBee network is not being received.

Wireless range factors. Bluelab quotes up to 100 m / 330 ft indoor range and up to 400 m / 1,312 ft line-of-sight in open space. Thick walls, dense plant canopies, large metal benches or shelving, refrigeration equipment, and other 2.4 GHz networks (Wi-Fi access points, microwaves) can reduce the working range. Mount the stick as high as practical with the antenna positioned vertically, and add a Range Extender 2 for facilities that need coverage beyond a single room.

Power and environment. The stick draws 5V over its USB cable directly from the host computer; no separate adapter or battery is required. The operating temperature range is 0–50°C / 32–122°F, which covers any typical indoor grow environment but means the stick should not be installed inside an unheated outbuilding in freezing climates.

Usage Guidelines

Once installed and paired, the Connect Stick 2 is a set-and-forget gateway — the day-to-day work happens in the Bluelab Connect software and on the monitors and controllers themselves. The following guidance covers normal operation after first setup.

Keep the host PC running for continuous logs. The Connect Stick 2 streams readings only while the host PC is awake and the Bluelab Connect software is running. For 24/7 data logging, disable the PC’s sleep timer (or use a dedicated low-power logging PC) so readings are recorded without gaps.

Monitor the status LEDs. The orange LED indicates power; if it is off, the USB cable, the port, or the PC has lost power. The blue LED indicates signal and communication activity; intermittent blue blinks during normal operation are expected as paired devices report in.

Position for signal, not aesthetics. The single largest factor in real-world range is mounting position. Wall-mount the stick as high as the 3 m / 10 ft USB cable allows, clear of plant canopies and metal benches, with the antenna pointing straight up. If you find a device dropping out at the edge of the room, raising or relocating the stick almost always recovers the link.

Avoid 2.4 GHz interference where possible. ZigBee shares the 2.4 GHz ISM band with Wi-Fi, Bluetooth, and many cordless devices. If you have a busy Wi-Fi mesh in the same room, consider moving the access point or the Bluelab stick a few metres apart, or switching the Wi-Fi network to less-congested channels. Microwave ovens running on the same circuit can cause short signal interruptions.

Add devices one at a time. When pairing a new Connect-series monitor or controller, add it to the Bluelab Connect software and confirm it shows up in the device list before pairing the next one. Pairing uses the 4-digit key code printed on each device.

What not to do. Do not unscrew the antenna while the stick is powered — remove the USB cable first to avoid stressing the connector. Do not block the antenna with metal shelving, ducting, or reflective insulation. Do not connect the stick to an unpowered USB hub; passive hubs cannot supply the 5V the stick needs.

How to Set Up the Connect Stick 2

Initial setup typically takes 10–15 minutes for a single stick and one paired device. The steps below assume you have at least one Bluelab Connect-series monitor or controller already installed on a reservoir and powered up.

1. Download the Bluelab Connect desktop software. On the PC that will host the stick, go to bluelab.com and download the free Bluelab Connect software for your operating system (Windows 7 SP1+, macOS 10.8.3+, or a Linux distribution with Java 8+). Install the software with default options and launch it once to confirm it runs.
2. Attach the external antenna. Unbox the Connect Stick 2 and screw the supplied external antenna onto the threaded port at the end of the stick. Tighten by hand — clockwise — until the antenna is firmly seated. Do not use pliers. The antenna will be positioned vertically once the stick is mounted.
3. Pick a high mounting location. Decide where to mount the stick. The best spot is high on a wall, well clear of plant canopies, metal benches, and large appliances. The 3 m / 10 ft USB cable gives you significant freedom; aim for the most open line-of-sight path between the stick and your paired devices.
4. Mount the stick. Use the wall-mount fixings to screw the stick into the wall in your chosen location, with the antenna pointing straight up. Alternatively, place it free-standing on a high shelf if wall mounting is not practical. Route the USB cable down to the host PC, leaving slack so the cable is not under tension.
5. Connect the USB cable to the host PC. Plug the USB end of the cable into a free USB 2.0 (or later) port directly on the PC. Avoid passive USB hubs — if a hub is unavoidable, use a powered hub that supplies its own 5V. The orange LED on the stick should illuminate within a few seconds.
6. Open Bluelab Connect on the PC. Launch the desktop software you installed in step 1. The application should detect the Connect Stick 2 on the USB port automatically and show it in the device list as the gateway. If it does not appear, unplug the USB cable, wait five seconds, plug it back in, and restart the software.
7. Pair your first Connect-series device. In the Bluelab Connect software, choose the option to add a new device and enter the 4-digit key code printed on the Connect-series monitor or controller you want to pair. The software will scan the ZigBee network, find the device, and add it to the active device list. Once paired, the device will start reporting pH, EC, and temperature data automatically.
8. Confirm the blue activity LED. Watch the blue LED on the Connect Stick 2. Once a paired device is reporting in, the blue LED will blink intermittently to indicate ZigBee traffic between the stick and the device. Steady-off blue with no activity in the software list means the paired device is out of range or powered off.
9. Repeat pairing for additional devices. Add each remaining Connect-series device one at a time using its own 4-digit key code, up to a maximum of 50 devices on a single Connect Stick 2. Confirm each new device appears in the software before moving on to the next.
10. Configure logging and storage. In the Bluelab Connect software, set the logging interval, choose the local folder where log files will be stored, and (optionally) configure alerts for out-of-range pH, EC, or temperature thresholds. Verify the host PC’s sleep settings are disabled so the stick continues to receive data overnight.
11. If range is short, add a Range Extender 2. If a device in a far room or behind dense canopy fails to pair or reports intermittently, install a Bluelab Connect Range Extender 2 partway between the stick and the device, pair the extender to the stick, and re-test. With one or more extenders, the effective range can reach 700 m / 2,300 ft.

Sources & Further Reading