Model: HCT-638
Brand: Diivoo
This manual provides detailed instructions for the setup, operation, and maintenance of your Diivoo WiFi Sprinkler Timer. This smart irrigation controller allows you to manage your garden watering system remotely via the "Smart Life" APP, offering convenience and efficiency for your lawn, garden, and potted plants. Please read this manual thoroughly before use to ensure proper installation and optimal performance.
Open the battery compartment on the back of the water timer. Insert 2 x 1.5V AA alkaline batteries, ensuring correct polarity. Close the battery compartment securely.

Image description: A close-up view of the Diivoo WiFi Sprinkler Timer's battery compartment, showing two AA batteries correctly installed. The compartment lid is open.
Ensure the leak-proof gasket is properly seated in the timer's inlet. For a secure, leak-free connection, wrap PTFE tape around the faucet threads before attaching the timer. Screw the timer onto your outdoor faucet by hand. Do not use tools to overtighten.

Image description: A diagram illustrating the steps to connect the Diivoo WiFi Sprinkler Timer to a faucet, emphasizing the use of PTFE tape and a leak-proof gasket for a tight seal.
Attach your garden hoses to the three independent outlets (A, B, C) at the bottom of the timer. Ensure connections are tight to prevent leaks.

Image description: A close-up view of the three threaded outlets (A, B, C) on the underside of the Diivoo WiFi Sprinkler Timer, where hoses are connected.
Download the "Smart Life" APP from your mobile device's app store. Register or log in to your Smart Life account. Plug in the Sub-GHz Gateway to a power outlet within 492ft (150m) of the water timer. The gateway and water timer will automatically attempt to match. If pairing fails, press and hold the water sprinkler timer button for 5 seconds to initiate automatic matching. In the Smart Life APP, add the Sub-GHz Gateway, then add the 3-Zone Water Timer.

Image description: A four-step visual guide demonstrating how to connect the Diivoo WiFi Sprinkler Timer to the Smart Life app, from downloading the app to adding the gateway and timer, and finally setting up an irrigation plan.
Note: The system only supports 2.4GHz WiFi connection. If your router has both 2.4GHz and 5GHz bands with a single SSID, you may need to configure separate SSIDs for each band in your router settings. Refer to your router's manual for specific instructions.
Open the "Smart Life" APP and select your Diivoo Water Timer. You can set up to 5 different watering schedules per outlet (Zone A, B, C).
Set watering durations from 1 second to 12 hours. Define cycle for 1-7 days (daily or customized days).

Image description: A screenshot from the Smart Life app illustrating the interface for setting up a timed irrigation schedule, including options for start time, duration, and selecting specific days of the week for the watering cycle.
Set misting durations and interval lengths from 1 to 59 minutes. Define cycle for 1-7 days (daily or customized days).

Image description: A screenshot from the Smart Life app displaying the interface for configuring Misting Mode, with settings for start time, mist duration, and interval duration.
To conserve water during rainy periods, you can pause watering for 1 to 7 days. Activate "Smart Weather" in the app to automatically delay irrigation based on local weather conditions.

Image description: A screenshot from the Smart Life app showing the Rain Delay feature, where users can select a delay period from 1 to 7 days to pause watering.
You can initiate manual watering without interrupting your preset schedules. Activate manual mode via the Smart Life APP or by pressing the A/B/C buttons directly on the timer. Manual watering duration can be set from 0 to 12 hours.

Image description: A collage of images demonstrating different uses for manual watering, including watering a garden, filling a small pool, and washing a vehicle.
The Diivoo Sprinkler Timer is compatible with Amazon Alexa and Google Assistant. Link your Smart Life account to your voice assistant. Use voice commands such as "Alexa, open zone 1" or "Hey Google, turn on zone 2" to control your watering zones.

Image description: An illustration depicting a user interacting with a smart speaker to control the Diivoo Sprinkler Timer via voice commands, highlighting compatibility with Amazon Alexa and Google Assistant.
| Problem | Possible Cause | Solution |
|---|---|---|
| Timer not connecting to APP | Incorrect WiFi band (not 2.4GHz), gateway out of range, pairing failed | Ensure 2.4GHz WiFi is used. Move gateway closer. Press and hold timer button for 5 seconds to re-initiate pairing. Check router settings for separate 2.4GHz SSID. |
| No water flow | Faucet off, low battery, clogged filter, valve malfunction | Turn on faucet. Replace batteries. Clean filter washer. Contact support if valve is faulty. |
| Leaking from connections | Loose connection, missing/damaged gasket, insufficient PTFE tape | Tighten connections by hand. Ensure gasket is present and undamaged. Apply PTFE tape to threads. |
| Schedules not running | Rain delay active, incorrect schedule setup, low battery | Check if rain delay is enabled in the app. Verify schedule settings. Replace batteries. |
| Feature | Detail |
|---|---|
| Model Number | HCT-638 |
| Product Dimensions | 5.24 x 4.96 x 2.8 inches |
| Item Weight | 1.59 pounds |
| Connectivity | 2.4GHz WiFi (via Sub-GHz Gateway) |
| Control Range | Up to 492ft (150m) without obstacles |
| Power Source | 2 x 1.5V AA Alkaline Batteries |
| Battery Life | 6-8 months |
| Irrigation Zones | 3 Independent Zones |
| Watering Programs | Up to 15 (5 per outlet) |
| Timed Irrigation Duration | 1 second - 12 hours |
| Misting Mode Duration | 1-59 minutes |
| Rain Delay | 1-7 days |
| Voice Control | Amazon Alexa, Google Assistant |
For product support, troubleshooting assistance, or warranty inquiries, please contact Diivoo customer care. Our team of experts is available 5 days a week via email or phone.
Visit the official Diivoo Store for more information: Diivoo Store on Amazon

Image description: A banner image featuring customer service representatives, symbolizing the availability of US/CA-based customer care for 5 days a week via email or phone.