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Description
house plant sensors PLT-1 Ultimate Plant SensorThe Apollo Automation PLT 1 is an ESP32 C3 based indoor plant multisensor that measures soil moisture (capacitive), air temperature, humidity, LUX, and UV, which can be used with Home Assistant via ESPHome! It also features an onboard piezo buzzer and addressable RGB LED. Soil temperature can be measured using the optional temperature probe add on. The sensor comes in a battery or non battery version, with the non battery (USB C powered, 5V 1A)
The Apollo Automation PLT-1 is an ESP32-C3-based indoor plant multisensor that measures soil moisture (capacitive), air temperature, humidity, LUX, and UV, which can be used with Home Assistant via ESPHome!
It also features an onboard piezo buzzer and addressable RGB LED. Soil temperature can be measured using the optional temperature probe add-on. The sensor comes in a battery or non-battery version, with the non-battery (USB-C powered, 5V 1A) version being significantly smaller - select an option before adding to your cart.
The PLT-1 uses a capacitive soil moisture sensor, which offers much better accuracy and durability compared to resistive sensors. Additionally, the ground contact portion is protected with a conformal coating, ensuring longevity and resistance to environmental factors.
Both versions of the PLT-1 come with a 3D printed case.
Note: The PLT-1B (battery version) does not include a battery or charger. You will need to source their own rechargeable 18650 batteries for the battery version, and a charger. Battery life is estimated at 6 months based on a quality rechargeable 18650 and the default sleep / wake settings.
Features
- ESP32-C3-Mini based: ESPHome compatible, allowing plant monitoring in HomeAssistant
- Capacitive Soil Moisture Sensor with conformal coating: Accurate and durable, perfect for monitoring plant hydration
- AHT20-F Air Temperature & Humidity Sensor: Dust-protected for reliable air condition tracking
- LTR390 UV & LUX Sensor: Measures light and UV exposure, ensuring optimal lighting for plants
- RGB LED: Customizable for notifications (e.g., watering alerts, light levels)
- Piezo Buzzer: Provides audible alerts for important plant care events
- Battery and Non-Battery Versions: Flexible power options to suit different setups and needs
- Home Assistant Integration: Easily automate and monitor plant health through your smart home system
- Can be used with an optional DS18B20 Waterproof Soil Temperature Probe: Monitors soil temperature with precision
Use Cases
- Automated Watering: With its capacitive soil moisture sensor, you can set up automations to water plants only when moisture levels drop below a certain threshold.
- Optimising Sunlight Exposure: Use the LUX and UV sensors to monitor light levels, ensuring your plants get the right amount of sunlight. Automate window shades or grow lights based on current light conditions.
- Temperature & Humidity Management: Track air temperature and humidity with the AHT20-F sensor, adjusting indoor climate controls (like fans, heaters, or humidifiers) to maintain ideal growing conditions.
- Soil Temperature Monitoring: Use the optional waterproof soil temperature probe to monitor and control soil warmth for temperature-sensitive plants, especially in colder months.
- Visual & Audio Alerts: The RGB LED can be programmed for visual notifications, such as turning red when soil is dry or green when conditions are optimal. The piezo buzzer can alert you if immediate action is needed.
Community Reviews
Resources
Documentation
Datasheets
3D Print Files
Apollo Automation Social
Package Contents
- Assembled PLT-1 sensor with 3D printed case
- Select a version before adding to your cart
Batteries, charger and USB cable not included.
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.9 ★★★★★
Based on 5 reviews
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Product Reviews
★★★★★ 5
Holy Wow!
Color: White, Size: Queen (Pack of 2)
These pillows are so fluffy and material is really soft. They came vacuumed packed. I thought well this will be a return for sure. Followed the directions and placed them in my dryer for 15 minutes. Could not believe how big and fluffy they were. My company always ask for the link and I have ordered them for family members and for myself 4 times. Mine I’ve had over a year and have kept their shape and fluffiness. If you like a fluffy pillow…this is the one. They are the best!!!
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Reviewed in the United States on May 7, 2026
★★★★★ 5
Comfortable and good quality
Color: White, Size: Queen (Pack of 2)
So comfortable! We stayed at an Airbnb that used these pillows and went home and ordered some! These are similar to another more expensive pillow I’ve used but way better price. The filling feels nice and they don’t go flat or get lumpy so far.
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Reviewed in the United States on May 16, 2026
★★★★★ 5
Firm/No Pillowcase To Fit/Gives Full Neck & Head Support
Color: White, Size: Standard
While the material cover is soft and the filling in the pillow itself is soft, there is too much filling stuffed inside. But to be fair I have a serious neck problem. I feel that if we were given the option to remove some of the filling to meet our comfort level then this would be the perfect pillow. I have been trying to find a pillow with that option. I will be cutting the pillow to remove the filling and place it in another pillow that has a zipper on the side to add inside. Over the yrs that pillow stuffing has become lumpy and needed replacing and can’t find another like it or the right filling. Luckily this pillow has the right stuffing so I am happy with my purchase. My husband has the second pillow and does agree with me that it is a bit on the firm side but he likes the firmness of it and it does support his head & neck well and it is comfortable. Only big issue for us is that there are no pillowcases to fit. When trying to fit a pillowcase on it - it makes the pillow way too tight & firm and uncomfortable. They need to make a pillowcase for this pillow. A standard, Queen, king does not fit.
UPDATE: 1/13/2025
This order came with 2 pillows. My husband has the 2nd pillow and so far he has no complaints with the pillow. For me to be fair I have serious issues with my neck. I have a lot of hardware in my neck including several small rods in my neck so to find a good pillow to be comfortable is very difficult to find. My only solution is to have a pillow with a zipper which I can remove or add the filling as needed, it just has to be the right kind of filling. This pillow has the right kind of filling to where I can put inside my original pillow that I have. Over time the filling just becomes lumpy and uncomfortable to which I need to refill with new filling. After a long search I found this pillow which had the same kind of filling I’ve been looking for to restuff my pillow. So with that said I can’t really review this product myself except to say that it has the right filling inside to help me with my sleeping but I can say with what my husband tells me which is he has no complaints, in fact he is happy with it and it supports his head & neck well. If you have a serious neck problem this might not be the pillow for you unless you already have a pillow with a zipper and can restuff it with any kind of filling then I do recommend the filling in this pillow. Sorry for the long review but I do hope it helps anyone who is struggling and is in the same situation as me.
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Reviewed in the United States on December 27, 2024
★★★★★ 5
Quality maintained
Color: White, Size: Queen
A client I service has these. She said she got them YEARS ago at Macy’s. Each time I change her linens I admire them for their plumpness.
I found the well worn name tag then ordered hoping the quality hadn’t fallen since “years ago.”
As pillows differ for everyone, I have found MY comfort level with this pillow.
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Reviewed in the United States on April 30, 2026
★★★★★ 4
Good quality and soft, but not for everybody.
Color: White, Size: Queen, Color: White, Size: Queen
These pillows are super comfortable if you like thick, firm ones. I absolutely loved them, they feel high-quality and supportive, but they are very thick, and after a while, I started getting some neck pain.
That said, over time they do soften up a bit and start to mold better to your body, which helps. I’d definitely recommend them for anyone who likes big, firm pillows, but they’re probably not the best choice for people who prefer something softer or lower.
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Reviewed in the United States on October 15, 2025