Lingo

An Android app for the Samsung Galaxy S25 FE. It translates speech in Shokz headphones, reads photos from HeyCyan-style glasses, and shows heart rate, blood pressure, steps, and calories from an ST9 watch.

Dependencies & Protocol Acknowledgments

Lingo is built upon established wearable protocols and hardware abstraction layers to enable multi-device synchronization:

• Glasses Core Connection: Leverages the com.oudmon.ble library framework to initiate device handshakes.
• Media Handling Pipeline: High-speed Wi-Fi transport, frame handling, and JPEG extraction logic are adapted from implementation patterns pioneered by the open-source CyanBridge repository (FerSaiyan/Alternative-HeyCyan-App-and-SDK).
• Smartwatch Biometrics: Vitals processing loops listen to native BLE streams patterned after the Moyoung data layout (originally documented by the Gadgetbridge ecosystem, v0.94.0).

Open Source Compliance & Copyright Notice

Lingo is distributed under the GNU GPLv3 license. See LICENSE.

Because this codebase integrates and builds upon structural open-source patterns from CyanBridge and Gadgetbridge (both GPL-licensed ecosystems), Lingo is strictly fully compliant with open-source copyleft requirements.

The custom application architecture, ambient processing loops, and specialized AI interaction systems (Translate, Gemini Assistant, SPIT, and Glasses Vision Mode) represent original implementation code by 7dollarbooks in 2026.

What it does

The app runs a foreground service so translation can continue while the phone is locked. Four parts work together:

1. Glasses link. Bluetooth stays connected for commands. A photo taken with the glasses camera button is a full JPEG on the glasses, downloaded over a direct Wi-Fi link.
2. Photo questions. Gemini Flash-Lite describes the photo or reads a sign. The upload is a smaller JPEG. Spoken answers start as sentences arrive.
3. Headphones. Speech recognition and spoken replies use the Shokz OpenRun Pro over media audio.
4. Watch. While the Watch screen is open, Lingo reads the ST9 directly. Heart rate and blood pressure start only when that card is refreshed. Steps and calories are read on connect and can update while the screen stays open.

Build

• Android Studio with JDK 17
• local.properties pointing at the Android SDK (this file is not committed)
• The Oudmon glasses SDK AAR, if it is not already on the machine. AAR files are not committed.

.\gradlew.bat :app:installDebug

On first launch, grant microphone, Bluetooth, nearby Wi-Fi, notifications, and location. Location is used to tell the home Wi-Fi name from other networks. Add a Gemini API key in Settings before asking about a photo.