Hytek Pool Hygiene
Monitors pH, REDOX, and chlorine values from Hytek pool hygiene control units via Modbus RTU.
This template reads pH, REDOX, and chlorine values from Hytek pool hygiene control units (EMEC WDPHRH-PER) via Modbus RTU. It provides raw sensor values, scaling factors, flow status, and canister empty alerts for remote pool water quality monitoring.
- Protocol
- Modbus RTU
- Connection
- RS485, 38400 baud
- Registers
- 7, read only
- Brand
- Hytek
- Key readings
- pH raw value · pH scaling factor · Chlorine raw value · Chlorine scaling factor · Chlorine canister empty · pH minus canister empty
- Compatible models
- EMEC WDPHRH-PER · Hytec EMEC WDPHRH-PER
- Last updated
Registers (7)
7 read, 0 write
| Name | Unit | Access | Address (Hidden until you enter your email) | Function (hidden) | Type (hidden) |
|---|---|---|---|---|---|
| ph Rohwert | Read | ||||
| Chlor Kanister leer | Read | ||||
| kein Durchfluss | Read | ||||
| ph Skalierungsfaktor | Read | ||||
| Chlor Rohwert | Read | ||||
| Chlor Skalierungsfaktor | Read | ||||
| ph Minus Kanister leer | Read |
Loading registers…
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Use cases
- Monitor pH and chlorine levels on a live dashboard to verify pool water quality remotely.
- Create an alert when the chlorine canister or pH minus canister is reported as empty.
- Log pH and REDOX values over time to generate water quality trend reports for pool operators.
- Detect flow status changes to identify pump failures or filter blockages in the pool circulation system.
- Combine pool hygiene data with heat pump and energy monitoring templates for a complete pool plant room overview.
Installation
Install the Hytek BT Modbus module on the EMEC WDPHRH-PER control unit and activate Modbus communication in the device settings.
Wire the RS-485 A and B terminals from the Hytek Modbus module to the corresponding RS-485 port on your ModbusCloud Gateway.
Set the Modbus RTU baud rate on the gateway to 38400 to match the Hytek unit configuration.
Assign a unique Modbus slave address on the Hytek unit and enter the same address in the ModbusCloud gateway configuration.
Import the Hytek Pool Hygiene template in the ModbusCloud platform and link it to the configured gateway connection.
Verify that pH raw value, chlorine raw value, and canister status registers are returning data on the ModbusCloud dashboard.
Things to watch for
Why are the pH and chlorine readings showing very large or very small numbers?
The template reads raw sensor values. You must apply the scaling factors from registers 3 (pH) and 7 (chlorine) to convert raw values into actual pH and mg/l readings. Configure calculated fields in ModbusCloud using these scaling factors.
The gateway cannot communicate with the Hytek unit. What should I check?
Confirm that Modbus is activated on the Hytek control unit. Check that the baud rate is set to 38400 on both the gateway and the Hytek Modbus module. Verify RS-485 wiring polarity (A to A, B to B) and ensure proper line termination.
Which Modbus slave address should I use for the Hytek unit?
The default slave address depends on your Hytek configuration. Check the device settings or the Hytek integration documentation. Make sure the address set on the device matches the address configured in the ModbusCloud gateway.
Is the Hytek BT Modbus module included with the control unit?
The Modbus module is typically a separate accessory. Contact your Hytek distributor or visit hytek.at to confirm compatibility and order the module if it is not already installed.
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