Astral Pool Viron eQuilibrium Chlorinator — pychlorinator

This is a fork of @pbutterworth's pychlorinator library.

A Python BLE (Bluetooth Low Energy) library for controlling Astral Pool Viron eQuilibrium and Halo series pool chlorinators.

It is the foundation for the Home Assistant Astral Pool Viron eQuilibrium Chlorinator integration forked from @pbutterworth's astralpool_chlorinator.

Changes from upstream

All current changes have been merged into the upstream repository.

Enabling debug logging

To log full coordinator data in Home Assistant, add to configuration.yaml:

logger:
  logs:
    pychlorinator.chlorinator: debug

Compatibility

• Tested on Viron EQ25
• Other Viron models should work but are untested
• Halo series: halochlorinator.py is unchanged from upstream

Credits

• @pbutterworth — original library and protocol reverse engineering

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Features

Viron / eQuilibrium

• Read current device state: operating mode, pump speed, pH, chlorine, ORP
• Control pump: off, auto, manual, low / medium / high speed
• Switch between pool and spa modes
• Write pH setpoint, chlorine output level, and default manual speed
• Acid dosing: disable indefinitely or for a set period
• Read timers (4 schedules), statistics, and device capabilities

Halo

• All of the above, plus:
• Temperature monitoring (board, water, heater, solar)
• Heater and solar panel control
• Multi-zone lighting control (on/off, auto, colour, sync)
• Equipment mode control: filter pump, GPO, valves, relays
• Maintenance task tracking

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Requirements

• Python 3.8+
• Bluetooth adapter accessible from the host machine
• bleak — BLE client
• bleak-retry-connector — reliable connection handling
• pycryptodome — AES-128 encryption (used by the device protocol)

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Installation

To install this fork directly:

pip install git+https://github.com/kesawi/pychlorinator@main

To install the upstream package from PyPI:

pip install pychlorinator

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Usage

Viron / eQuilibrium Chlorinator

import asyncio
from bleak import BleakScanner
from pychlorinator.chlorinator import ChlorinatorAPI

async def main():
    # Discover the device by name or address
    device = await BleakScanner.find_device_by_name("Viron")

    api = ChlorinatorAPI(ble_device=device, access_code="1234")

    # Read all state from the device
    data = await api.async_gatherdata()

    print(f"Mode:        {data['state'].mode}")
    print(f"Pump speed:  {data['state'].speed}")
    print(f"pH:          {data['state'].ph}")
    print(f"Chlorine:    {data['state'].chlorine}")
    print(f"ORP:         {data['state'].orp}")

asyncio.run(main())

Sending commands

from pychlorinator.chlorinator_parsers import ChlorinatorActions

# Turn pump on in auto mode
await api.async_write_action(ChlorinatorActions.Auto)

# Switch to spa mode
await api.async_write_action(ChlorinatorActions.Spa)

# Disable acid dosing for 30 minutes
await api.async_write_action(
    ChlorinatorActions.DisableAcidDosingForPeriod,
    period_minutes=30,
)

# Update setpoints
await api.async_write_setup(ph_setpoint=7.4, chlorine_setpoint=60)

Halo Chlorinator

import asyncio
from bleak import BleakScanner
from pychlorinator.halochlorinator import HaloChlorinatorAPI

async def main():
    device = await BleakScanner.find_device_by_name("Halo")

    api = HaloChlorinatorAPI(ble_device=device, access_code="1234")
    data = await api.async_gatherdata()

    print(f"Water temp:  {data['temp'].water_temperature}")
    print(f"Solar temp:  {data['temp'].solar_roof_temperature}")

asyncio.run(main())

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API Reference

ChlorinatorAPI

Method	Description
async_gatherdata()	Reads all device state, setup, capabilities, timers, and statistics. Returns a dict of parsed characteristic objects.
async_write_action(action, period_minutes=None)	Sends a control command. period_minutes is used with DisableAcidDosingForPeriod.
async_write_setup(ph_setpoint, chlorine_setpoint, default_speed)	Writes pH setpoint, chlorine output level, and default manual speed.

ChlorinatorActions

Action	Description
Off	Turn pump off
Auto	Auto mode
Manual	Manual mode at default speed
Low / Medium / High	Manual mode at specific speed
Pool / Spa	Switch between pool and spa
DisableAcidDosingIndefinitely	Pause acid dosing
DisableAcidDosingForPeriod	Pause acid dosing for period_minutes
ResetStatistics	Clear historical statistics
TriggerCellReversal	Manually trigger cell reversal
DismissInfoMessage	Dismiss active info/warning message

HaloChlorinatorAPI

HaloChlorinatorAPI exposes the same async_gatherdata() interface and also accepts action commands via the ChlorinatorActions, HeaterAppActions, SolarAppActions, and LightAppActions enums defined in halo_parsers.

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Data Objects

async_gatherdata() returns a dictionary whose values are parsed dataclass-style objects. Key entries:

Key	Type	Contents
state	ChlorinatorState	Mode, speed, pH, chlorine, ORP, timer info, info messages
setup	ChlorinatorSetup	pH and chlorine setpoints, default speed
capabilities	ChlorinatorCapabilities	Min/max limits for pH and chlorine
timers	ChlorinatorTimers	Four pump timer schedules
statistics	ChlorinatorStatistics	pH/ORP min/max, cell reversals, running time, salt level
settings	ChlorinatorSettings	Acid dosing inhibit status and remaining time
temp (Halo)	TempCharacteristic	Board, water, heater, and solar temperatures
equipment (Halo)	EquipmentModeCharacteristic	Pump, GPO, valve, and relay modes
lights (Halo)	LightStateCharacteristic	Lighting zone state and colour

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Contributing

Contributions should be made to the upstream repository (pbutterworth/pychlorinator)

Related

• Original @pbutterworth's astralpool_chlorinator — Home Assistant custom integration that uses this library
• My forked astralpool_chlorinator — Home Assistant custom integration that uses this library

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License

MIT License — see LICENSE for details.