The OS for Off-Grid Messaging.
Transform your mesh radio into a powerful bilingual messenger. Connect anywhere—no internet required.
The Whisper Ecosystem
Bringing intelligence to bare-metal mesh hardware.
Whisper OS
The ultimate off-grid firmware.
Turn raw radio hardware into a seamless communication tool. Whisper OS gives you intuitive messaging, live radio diagnostics, and smart predictive text—all built perfectly for small screens.
Premium Features
Intelligent Input Suite
- Next-gen predictive text (EN/CN)
- Full Pinyin IME with phrase suggestions
- Virtual keyboard with CJK font support
- Smart word completion as you type
Wio Tracker L1, GAT562, Meshtiny
GPS Duty Cycle
- Pick a GPS mode that matches the mission
- Trade fix frequency for battery life directly
- Clear presets from basic to ultra eco
- Built for GPS-equipped field hardware
Supported GPS-equipped devices
Radio & Repeater
- Read frequency, bandwidth, and spread factor fast
- Watch noise floor and channel conditions live
- Make setup decisions from device-side diagnostics
- Useful in the field when a laptop is not around
All devices
Morse Code Input
- Send messages using morse code
- Perfect for stealth communication
- Alternative input method
All devices with morse support
GPS Privacy Control
- Toggle coordinate visibility on/off
- Keep your location private
- One-tap coordinate hiding
All GPS-equipped devices
Messaging
Quick messages & virtual keyboard
Customizable preset phrases, delivery status
Languages
English, Chinese, Japanese, Korean
Full multilingual message support
Display
Always-on clock modes
Default, Binary, Cat, Dog faces
Network
Repeater mode with live stats
Packet forwarding visualization
Power
ADC calibration for accuracy
Accurate battery readings
Updates
BLE OTA firmware updates
One-tap bootloader (nRF52)
Supported Devices
FoBE Quill, GAT562, Heltec T114, Heltec V3/V4, MeshTiny, ProMicro, RAK4631, Wio Tracker L1
🎁 Bundle deal: the 4th key is on us.
Buy 3 premium keys in one order and we will automatically add a free extra key.
Our Partners
Working together with industry leaders to bring you the best mesh networking solutions
