Changelog

Added

• Miner firmware upgrades: You will be able to upgrade your miner firmware up to a version that we specify and validate. OFEN ONLY.

Improved

• DNS: 21energy products now use DNS over TLS to improve end user security and limit third parties blocking bitcoin mining.

Fixed

• Various bug fixes.

This release signifies a 21energy milestone. This is the release version for our Port and brings many improvements, that you might not notice. What you will notice are the following changes we made:

Added

• Auto-Updates: Enable or disable auto-updates and trigger software updates directly through the app. Requires app version 2.25.0 or higher.
• Hashrate Trend: View the hashrate trend of your device over the last 24 hours in the app. Requires app version 2.25.0 or higher.

Improved

• Connection Stability: Major stability improvements — your device will no longer be shown as offline in the app when it isn't actually offline.
• Miner Tuning: Target temperatures and power targets have been tweaked to ensure better stability and long-term reliability.

Fixed

• Various bug fixes.

Security

• The app and device now regularly rotate their shared secret keys to improve security.

Breaking Changes

REST API

• Calling the REST API now requires setting the `Host` header. This closes a remote-code-execution attack channel. Migration: If you call the API manually (e.g. via `curl` or custom scripts), add the `Host` header to your requests. Tools like Home Assistant, browsers, and common automation software set this automatically and are not affected.

Added

Miner Support

• Bitmain S21 is now fully supported across the app and firmware.
• Whatsminer support has been added at the driver level.

Mobile App

• Schedule editing is now available directly in the app.

Changed

Power Management

• Dynamic Power Scaling (DPS) settings have been updated for S19 and S21 miners.

Improved

• Wi-Fi scanning is now more stable.
• Scheduling Activation timing and day-boundary behaviour have been made more reliable.
• Custom names (formerly known as room names) now sync correctly across devices.
• Overall system stability improved, including handling of unexpected disconnections.

Fixed

• Factory reset now fully reverts the device to its out-of-the-box state.
• Fixed crashes triggered by unexpected network disconnections.

Security

• Patched unauthorised SSH access.
• Closed unprotected miner API endpoints.
• Corrected a firewall misconfiguration that could have allowed external devices to reach miners directly.
• Two additional security vulnerabilities have been patched (details withheld until broadly rolled out).

Fixed

Connection issues on IPv6-only networks should now be resolved.

• Drivers can be restarted while the miner is running without sending the miner into cooldown mode.
• Heater Startup: The very first start of a heater is now correctly started instead of being paused.
• Ofen 1: Fan controller no longer stops and restarts when switching power levels.
• Ofen 2: Thermostat no longer gets stuck on a single level and failing to change.
• Empty pool groups on the miner can now be recovered automatically.

Improved

• Power Management: DPS settings have been updated for better stability.

Added

• REST API: Improved and expanded REST API documentation.

Changed

• Ofen 2: Maximum power level increased from 2760 W to 3000 W.
• Automation: Timer automation now overrides thermostat control — the thermostat stops regulating while a timer automation is active.

Fixed

• Wi-Fi Setup: Wi-Fi setup no longer fails when the password contains a `$` character.
• Thermostat: Thermostat no longer incorrectly shows as "out of range".
• Ofen Startup: Fixed an issue where pressing "on" resulted in infinite loading in the app and the Ofen had to be power-cycled to recover.
• Timer Automation: Timer automation now activates the correct power level even if the Ofen was already on beforehand.- Two timer automations scheduled directly after each other now transition cleanly.

Added

Mobile App

• The driver version is now shown in the app alongside the software version.
• The app now indicates when an Ofen is currently updating.

Thermostat

• Thermostat is now fully public and available to all users.

Ofen

• Ofen now remembers its last state after being shut down and restores it on the next start.

Networking

• IPv6 support.

Multi-Session

• Internal support for multiple apps connecting to the same Ofen simultaneously.

Improved

• Security: Firewall rules tightened.

Fixed

• Scheduling: Multiple fixes around schedule reliability.
• Production / First Boot: Fixed issues with initial power level and unset configurations on freshly produced devices.
• General: A large number of internal bug fixes across the firmware stack.