Firmware Update
OTA firmware upgrade over BLE, version channels, and recovery on ReaSnow S2.
S2 firmware is updated wirelessly through the ReaSnow Manager APP — no PC, no USB cable, no file downloads required.
Update Channels
Choose a channel based on your needs:
| Channel | Description |
|---|---|
| Stable | Production-ready firmware. Recommended for all users. |
| Beta | Pre-release builds with new features. Minor issues possible. |
| Alpha | Development builds. For testing only — expect bugs. |
💡 Tip: Stay on the Stable channel unless you are testing a specific fix or feature with guidance from ReaSnow support.
How to Update
- Open the ReaSnow Manager APP and connect to S2.
- Navigate to Settings → Firmware Upgrade.
- The APP checks the server for available updates.
- If a newer version is available, tap Upgrade.
- The upgrade proceeds in four phases:
| Phase | Description |
|---|---|
| Version Check | APP compares local firmware version against the server manifest |
| Erase | S2 erases its old firmware partition |
| Download & Write | Firmware is sent over BLE. |
| Result Query | APP confirms the upgrade completed successfully |
During the Update
| What You See | What It Means |
|---|---|
| Progress percentage | Overall completion |
| Speed (KB/s) | Current BLE transfer rate |
| Estimated time remaining | Countdown to completion |
Important Notes
⚠️ Warning — follow these or the upgrade may fail:
| Rule | Reason |
|---|---|
| Keep the APP in the foreground | Backgrounded apps may be suspended by the OS |
| Do not let the phone screen turn off | Screen-off can interrupt the BLE connection |
| Disable battery saver / power-saving mode | Power saving throttles BLE throughput |
| Stay within 2 meters of S2 | BLE signal weakens with distance |
| Do not unplug S2 | Power loss during flashing can corrupt firmware |
Recovery
If an upgrade fails:
- The APP shows an error message with the failed phase.
- S2 remains in its current working state — a failed upgrade does not brick the device.
- Tap Retry to attempt the upgrade again.
- If repeated attempts fail, try:
- Moving closer to S2 (within 1 meter).
- Restarting the APP.
- Power-cycling S2.
- Switching to a different phone if BLE performance is consistently poor.
If the issue persists, contact ReaSnow support with your current firmware version and the error message.