The Bluetooth Mini Program solution built for a body fat scale manufacturer passed acceptance. Using uni-app + direct BLE, users scan to open the Mini Program and step on — no app download required.
The hard parts were Bluetooth protocol compatibility across hardware batches and data re-upload under weak networks — solved through a protocol abstraction layer and offline caching.
Three months after launch, both device activation rates and the client's e-commerce store ratings improved noticeably.