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I will build esp32 spa and hot tub controller firmware with a flutter app in china
Embedded Firmware IoT Engineer ESP32 BLE LTE Flutter
Embedded systems engineer delivering complete IoT products — from schematic to firmware to mobile app. I work with ESP32/ESP-IDF, nRF52 BLE, STM32, Qualcomm QCC audio SoCs, Quectel LTE (QuecPython), B...
About this Gig
Turn your spa or hot tub into a smart, connected product.
I build complete control systems for spas and hot tubs ESP32 firmware on the controller and a Flutter mobile app for the owner. This is not a demo: my system is already running in the field.
WHAT YOU GET
ESP32 (ESP-IDF) firmware controlling pumps, heater, jets, blower and lights via relay I/O
Water-quality monitoring: pH, ORP, temperature, EC/TDS, turbidity and flow (Modbus RTU, 420 mA)
Touchscreen control panel built with LVGL
Safety interlocks, fault detection and alarms
Flutter app for Android & iOS: live status, remote control, schedules and push alerts
Cloud dashboard with ThingsBoard, multi-language UI
WHY ME
Field-proven system, tested with real operators
Firmware, app and cloud from one developer no integration gaps
Clean English code, clear documentation and support after delivery
Please message me before ordering with your hardware, sensors and feature list so I can send you an accurate plan.
Other Electronics Engineering Services I Offer
FAQ
Do you work with my existing hardware?
Yes. Send me your board, relay module and sensor models, and I'll confirm compatibility before we start.
Can the app work without internet?
Local control on the touchscreen always works offline. The mobile app uses the cloud for remote access, and local Wi-Fi control can be added.
Do I get the source code?
Yes, full source code for firmware and app is included in every package.
Can you publish the app to Google Play and the App Store?
Yes, I can prepare release builds and help with publishing using your developer accounts.
Do you support after delivery?
Yes. I help analyse field issues and give clear instructions for operators.
Reviews
1 reviews for this Gig
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Rating Breakdown
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- Quality of delivery
- Value of delivery
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davidmatteso410
United States
Li is very professional. Great to work with. Fast delivery and quick response. He focused on detail, considered all exceptions and provided bug-free firmware. Highly recommend for embedded firmware development. Thank you for your great work. Surely want to work with you again.
$50-$100
Price
1 day
Duration
Helpful?
Reviews
1 reviews for this Gig
| (1) | ||
| (0) | ||
| (0) | ||
| (0) | ||
| (0) |
Rating Breakdown
- Seller communication level
- Quality of delivery
- Value of delivery
Sort By
Most relevant
D davidmatteso410
United States
Li is very professional. Great to work with. Fast delivery and quick response. He focused on detail, considered all exceptions and provided bug-free firmware. Highly recommend for embedded firmware development. Thank you for your great work. Surely want to work with you again.
$50-$100
Price
1 day
Duration
Helpful?
