The flexible climate and environment sensor – measures light, temperature, and humidity for your plants.
1. What is the FYTA Sphere?
The FYTA Sphere is a flexible ambient sensor for potted plants – indoors and outdoors. Unlike the Beam G2 or Mini, it is not inserted into the soil but placed above ground at the pot rim, on a branch, or on the surface of the substrate. It measures three key environmental parameters:
Light (PPFD/DLI) – how much usable light energy reaches your plant
Temperature (°C/°F) – ambient temperature at the plant's location
Humidity (%) – relative air humidity in the plant's surroundings
The Sphere is particularly well suited as a companion to the FYTA Mini – the Mini handles soil monitoring while the Sphere takes care of the environment. Together they provide a complete picture of plant health.
The Sphere measures every 15 minutes and transmits data to your smartphone via Bluetooth. For a permanent connection – even when you're away from home – you can optionally use a FYTA WLAN Hub or the FYTA Terra as a hub (This feature will come soon.)
2. Where should I use the Sphere?
The Sphere is versatile and works particularly well for:
Houseplants – placed on the soil in the pot or clipped to the pot rim
Balcony and terrace plants – for light and climate monitoring outdoors
Grow tents – for monitoring light, temperature, and humidity in controlled environments
Plant groups – one Sphere can capture the environmental conditions for several plants at a single location
Ideal placement: Place the Sphere on the soil in the pot, clip it to a branch, or set it on the pot rim – making sure the light sensor has a clear view upward and is not covered by leaves. The app will also show a placement recommendation at the end of the setup.
💡 Bluetooth is enough without a hub.
The Sphere works without a hub – it transmits data directly via Bluetooth when your smartphone is nearby. For real-time notifications even when you're away, we recommend a FYTA WLAN Hub.
3. Components overview
Sphere – parts
Light ball – top-facing, measures light intensity (PPFD/DLI)
Controll light (dome)
Magnet – connects the top and bottom sections
Battery compartment – for 1× CR2450 coin cell battery
Housing (body/lower part) – contains electronics, Bluetooth module, humidity and temperature sensor
Side button – for pairing and resetting
Rubber feet / mounting elements – for stable placement in the pot or on a branch
Status light – what does it mean?
LED behaviour | Meaning |
Blinking blue | Pairing mode active |
Solid orange | Firmware update in progress |
Lights up green (once) | Successfully connected |
Blinking red (when the button is pressed) | Battery is flat |
4. Preparation
Before setting up the Sphere, make sure you have the following ready:
What you need:
Your smartphone with the FYTA App installed (App Store | Google Play)
A FYTA account (or register directly in the app)
Bluetooth enabled on your smartphone
1× CR2450 coin cell battery (pre-installed in the package)
Prepare the app
Add a plant in the FYTA App before pairing the Sphere. This speeds up the setup considerably, as you can assign a plant to the sensor straight away.
5. Setup – step by step
Phase 1 – Activate the Sphere and pair via Bluetooth
Step 1: Activate the sensor
Separate the top part of the Sphere from the body by pulling it off. Turn the battery compartment cover to the left to open it. Pull the protective film out of the battery compartment – the battery comes pre-installed. Close the cover by turning it to the right. Reattach the top part to the body. The sensor is now active.
Step 2: Pair in the app
There are several ways to add a sensor in the FYTA App:
Tap the green menu button in the centre, then tap New Device
Go to Plant Pro and tap + New Device
Go to Garden and tap + Sensor
Go to the Devices menu and tap + in the top right corner
In the device selection screen, you will see all available FYTA devices – select "Sphere".
Step 3: Press the side button
Press the small button on the side of the Sphere for a few seconds. The sensor enters pairing mode and starts pulsing blue. Keep your smartphone close to the device – the app will connect automatically.
Step 4: Firmware update
After connecting, the app checks whether a firmware update is available and installs it automatically. This may take a few minutes. Keep your smartphone nearby and leave the app in the foreground.
Phase 2 – Set up the sensor
Step 5: Select plants to monitor
The app asks which plants the Sphere should monitor. The Sphere captures light, temperature, and humidity for a single plant or a group of plants at one location. Choose plants that:
are close together and share similar light conditions
are at a similar height
grow under the same lighting conditions
Step 6: Name the sensor and assign a plant
The app will ask you to give your sensor a name (e.g. "Living Room South" or "Grow Tent") and assign it to a plant or group.
Phase 3 – Position the sensor
Step 7: Position the Sphere
Place the Sphere right next to your plant – on a branch, a stick stuck in the pot, or something else right next to your plant at leaf height. At the end of the setup, the app will show you a recommendation for the optimal placement. Make sure that:
the light sensor (top of the sphere) has a clear view upwards and is not obscured by leaves
the Sphere is stable and cannot slip
it is at the same height as the plant’s leaves
Step 8: Finish in the app
Tap "Done" in the app. The Sphere will now start collecting data. The first complete readings and an analysis will be available after approx. 24 hours.
🌱 Tip for best results: Make sure the light ball has a clear view upward and is not permanently covered by leaves or other objects.
6. Connectivity & data transmission
Without a hub – directly via Bluetooth
The Sphere stores readings locally and transmits them to your smartphone via Bluetooth. To sync the data, you need to open the app near the sensor – automatic background transmission does not occur. This option is ideal for plants you see every day.
With the FYTA WLAN Hub – real-time monitoring
For continuous notifications and live data, we recommend the FYTA WLAN Hub. It permanently connects your Sphere to the FYTA Cloud and sends you real-time alerts – even when you're not at home.
With FYTA Terra as a hub
The FYTA Terra has a built-in Wi-Fi connection and can act as a hub for your Sphere – without a separate hub device.
💡 Open the app regularly near your sensors – for example when watering your plants – to ensure all readings are reliably synchronised.
This feature will come soon.
7. Replacing the battery
The Sphere uses a CR2450 coin cell battery. The app will notify you in good time when the battery is running low. Battery life is typically 12 months.
Separate the top part of the Sphere from the body by pulling it off.
Turn the battery compartment cover to the left and open it.
Remove the old battery and dispose of it properly (electronic waste / return to a retailer).
Insert the new CR2450 battery with the correct polarity.
Close the cover by turning it to the right.
Reattach the top part to the body.
The connection to the app will be restored automatically.
💡 CR2450 batteries are available at supermarkets, drugstores, and online.
8. Troubleshooting & FAQs
Sensor not found in the app
Sensor not found in the app
On iOS:
Make sure that permission for Bluetooth and nearby devices has been granted so that the FYTA app can detect devices.
On Android:
Make sure that location and nearby device permissions have been granted and that Bluetooth is turned on.
App and device:
Press the button on the sensor.
If the sensor flashes blue, it is in pairing mode.
Start the setup process in the app
From the plant to 'New device'
In the device menu, tap the + in the top right-hand corner
Follow the instructions.
Troubleshooting
If the app cannot find any devices and skips straight to the next step, check the permissions and grant them again if necessary.
Restart your phone and try again.
How long does the battery last?
How long does the battery last?
Battery life is typically 12 months, depending on ambient temperature and connection frequency. The app will notify you when the battery needs to be replaced.
Can the Sphere be used outdoors?
Can the Sphere be used outdoors?
Yes, the Sphere is suitable for indoor and outdoor use. However, it is not fully waterproof – protect it from direct heavy rain and frost.
What is the difference between the Sphere and the Beam G2?
What is the difference between the Sphere and the Beam G2?
The FYTA Beam G2 additionally measures soil moisture and EC directly in the substrate – it is inserted into the soil. The Sphere measures only environmental data (light, temperature, humidity) and is placed above ground. For a complete picture of plant health, we recommend combining the FYTA Mini (soil) with the FYTA Sphere (environment).
Can one Sphere monitor multiple plants?
Can one Sphere monitor multiple plants?
Yes – the Sphere can capture the environmental conditions for multiple plants that are close together and share similar light and climate conditions.