The OS for Off-Grid Messaging.

Transform your mesh radio into a powerful bilingual messenger. Connect anywhere—no internet required.

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The Whisper Ecosystem

Bringing intelligence to bare-metal mesh hardware.

Whisper OS

The ultimate off-grid firmware.

v1.3.4 Powered by MeshCore

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

Whisper OS message view on a small screen Whisper OS intelligent input message composition screen

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

Whisper OS live GPS status screen Whisper OS GPS duty cycle selection screen

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

Whisper OS radio diagnostics screen Whisper OS radio settings screen

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.

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Our Partners

Working together with industry leaders to bring you the best mesh networking solutions

FoBE Studio
JAT IOT
MToolsTec
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