WiFi-remote-for-Bestway-Lay-Z-SPA

ESP8266 hack to use as WiFi remote control for Bestway Lay-Z-Spa Whirlpools (including 2021 year models)
Latest code found in Development branch

• Features
• BOM
• Web Interface
• WiFi Module / Pump
• Schematics
• Installation
• Installation (Alternative)
• Problems?

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Disclaimer

As mentioned, this is a hack. If anything breaks it is your fault.

Caution

Pull out the mains plug before modifying hardware, or you can die!

Donate

If you like this project, please consider a donation. Buy me a coffee, thanks!

Features

• Control buttons, watch the temperature and get current states from your browser.
• Custom text on the SPA pump display.
• Custom sound instead of just beeping is possible.
• OTA: Update firmware "over the air". Super convenient when mounted inside the pump.
• Simple to build. No hardware changes needed on the SPA pump. Just remove the display, disconnect the 6- or 4-pin ribbon cable and plug it into this device.
• Timer for chlorine addition and filter change. Hit the button on the web interface and it will count the days for you. (@Bankaifan)
• Electricity cost estimation and more..
• MQTT support! Now you can control the SPA from Home Assistant, OpenHab etc. (@faboaic, @877dev)
• Schedule events like heater on/off at specific dates, with repeat functionality.
• Listen to input signal on one pin and trigger a signal on another pin on desired events. For instance let solar panels turn on/off heater.

BOM

• ESP8266 NodeMCU 1.0 (NOT for ESP32)
• 8 channel bidirectional level converter
• 6 or 4 pin male header (0.1 in spacing) or better: JST-SM Housing Connector
• 6 or 4 pin female header (JST-SM Housing Connector) see build instructions for more info.

Web Interface

WiFi Module / Pump

Schematics

Installation

Link to my version of the PCB (use with LLC below): oshwlab.com | easyeda.com

Open the project in editor and download gerber files. Upload them to a PCB factory like JLCPCB. You can also find the gerber files in the code/PCB folder here. There is a v2 also which has slots for both kinds of LLC, and room for low pass filter if needed. I have ordered this but not tested yet!
New pin numbers. Must edit code before use!
Technical details in the Documentation. Build instructions and more: Instructions

@misterpeee's wife made and shared this case for 3d printing visualapproach#265 (comment)

Installation (Alternative)

Eric's PCB (use with LLC below, choose 1x8 ch or 2x4 ch according to the PCB). Replace the resistors with wires. They cause more problems than they solve.

Problems?

Read the FAQ, other discussions and current issues.