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Valves

Irrigation Scheduling

Setting up timed and sensor-triggered valve schedules in the HPzenAi app.

How Scheduling Works​

Valve schedules are created in the HPzenAi app and stored on the relay controller. The controller executes schedules independently — valves open and close on time even if the app is closed or the internet is temporarily unavailable. Each of the 8 relay channels can have its own independent daily or weekly schedule, sunrise/sunset-offset timing, or sensor-triggered automation.

Creating a Timed Irrigation Schedule​

Visual reference coming soon

Steps​

  • Open the HPzenAi app and navigate to the relay controller device tile.
  • Tap Schedules → New Schedule.
  • Select the channel number corresponding to the valve zone you want to schedule.
  • Set the Start Time (e.g., 06:00) and Duration (e.g., 30 minutes).
  • Choose the Recurrence: Daily, specific days of the week, or custom intervals.
  • Tap Save — the schedule is pushed to the relay controller and stored locally.
  • Verify the schedule appears in the channel's schedule list with the correct time and days.
  • To pause a schedule without deleting it, toggle the schedule off from the schedule list.

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Sunrise / Sunset Offset Scheduling​

Instead of a fixed clock time, schedules can be triggered relative to sunrise or sunset. This is useful for garden watering — for example, 'start 30 minutes before sunrise every day'. The relay controller adjusts start times automatically each day based on the gateway's location data.

Steps​

  • In New Schedule, tap Start Time and switch from 'Fixed Time' to 'Sunrise Offset' or 'Sunset Offset'.
  • Set the offset in minutes — positive values run after sunrise/sunset, negative values before.
  • Ensure the gateway has accurate location settings: Gateway → Settings → Location.
  • Sunrise/sunset times update daily on the controller automatically.

Sequential Zone Watering​

To water multiple zones in sequence without running them simultaneously, stagger the schedules across channels with start times spaced by the duration of the previous zone. This prevents excessive current draw and ensures each zone receives adequate pressure.

Steps​

  • Assign Zone 1 (channel 1) a start time of 06:00 and a 20-minute duration.
  • Assign Zone 2 (channel 2) a start time of 06:20 and a 20-minute duration.
  • Continue assigning staggered start times for each zone.
  • Only one valve opens at a time — this maximises flow rate and pressure per zone.
  • If zones must run simultaneously, verify the water supply can meet the combined flow demand.

Manual Override​

Any scheduled valve can be manually opened or closed from the app at any time. The manual state remains active until the next scheduled event fires, or until you manually return the channel to automatic mode.

Steps​

  • Open the relay controller tile in the app.
  • Tap the channel you want to override.
  • Tap Open or Close to manually control the valve.
  • A 'Manual' badge appears on the channel tile to indicate the override is active.
  • To return to scheduled control, tap Resume Schedule on the channel.
  • Manual overrides do not cancel existing schedules — the next scheduled event will execute normally.

Schedule Checklist​

Steps​

  • Each valve channel has a named zone for easy identification.
  • Schedules reviewed and confirmed in the channel's schedule list.
  • Sequential watering zones staggered to avoid simultaneous operation where pressure is limited.
  • Sunrise/sunset offsets configured if using time-relative scheduling.
  • Controller tested offline — confirmed schedules run without app connectivity.