Contact person: Business Client

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Location: Veliko Tarnovo, Netherlands

Budget: Recommended by industry experts

Time to start: As soon as possible

Project description:
"Project Overview
I'm looking for an enthusiastic developer for a hobby project that involves reverse engineering the FitDays Android app and creating a real-time web interface for a smart scale (FG2305ULB).
Project Goal
Create an HTML page with BLE (Bluetooth Low Energy) support that connects to the FG2305ULB smart scale, captures all real-time data, and displays it accurately in a clean interface. A visual body diagram is welcome but not mandatory - accuracy of the measurements is the top priority.

Requirements
Must Have:
Reverse engineer the FitDays Android app - this is mandatory as the BIA (Bioelectrical Impedance Analysis) calculation algorithms are embedded in the app
HTML page with BLE support that connects to the FG2305ULB smart scale
Extract and implement the BIA algorithms to correctly calculate all body composition metrics
Read and display ALL measurements including all BIA values (body fat, muscle mass, bone mass, water percentage, visceral fat, etc.) in the correct locations
100% accurate data parsing, calculation, and display of all bioimpedance metrics

Skills Needed:
Strong reverse engineering skills for Android apps (essential)
Ability to extract and understand proprietary algorithms from compiled code
Bluetooth Low Energy (BLE) protocol knowledge
HTML/JavaScript development
Experience with sensor data parsing
Understanding of bioimpedance measurement protocols

What I Can Provide
If needed, I can provide a Wireshark PCAPNG file (nRF Sniffer capture) to help with protocol analysis
Access to test with the actual FG2305ULB device for verification

Budget & Timeline
Budget: $60 USD - FIXED, NON-NEGOTIABLE
Deadline: October 16, 2025
Payment: Project will be awarded once you can demonstrate a working solution with accurate BIA calculations (I have the FG2305ULB device to verify)

Future Opportunities
If you deliver quality work on this project, there will be opportunities for additional projects in the future. I'm looking to build a long-term working relationship with the right developer who demonstrates skill and reliability.

Ideal Candidate
This is a hobby project with a modest budget, so I'm looking for someone who:
Has proven experience in reverse engineering Android apps and extracting algorithms
Enjoys the technical challenge of decoding proprietary protocols and calculations
Is passionate about BLE and IoT projects
Doesn't require a high budget but finds the work interesting
Can deliver quality work within the short timeframe
Is interested in potential ongoing collaboration

Important Notes

About the budget: Please save yourself and me time - if you want to negotiate the budget, this project is not for you. The budget is low and will NOT be increased. Only apply if $60 works for you.
About the timeline: Since this is a small project, the timeline is tight. The core challenge is reverse engineering the FitDays app to extract the BIA calculation algorithms - this is not optional. Please only apply if you're confident you can handle this reverse engineering task and deliver by the deadline." (client-provided description)