### Apollo OS 2.1.1
This is the general OS 2.1 non beta release, with a large number of bug fixes from beta. In addition to bug fixes we have introduced low level changes allowing our Stratum Solo server to accept large amounts of hashpower from rental services like Braiins hashpower. The new start diff option in settings/pools can be changed to allow for this (recommend 500k+ if using large amount of hashrate or 1K+ connected miners). We have tested with up to 500PH and 5k connected miners to Solo Node and Apollo II!
Our largest update to Apollo OS 2 since release! This release features major backend and front end changes, with a much more robust management of Apollo Core services including node functionality, solo pool, and miner services. New features include hashrate graphs to better visualize miner and pool performance, user selection of core clients, easy access to system and services logs, and much more!
v2.1 CHANGELOG
• Added new hashrate chart feature
• Major refactoring of backend services and API state engine
• Added user selectable core clients
• Added API/UI logs
• (RE)Added temperature settings
• Added block found monitor and celebration
• Various UI/Data fixes
• Better Mining Drawers
• Better UI responsiveness
• Updated JS packages (GraphQL, Redux, React, NextJS)
• Updated base OS packages and security updates
**Image Releases:**
REMINDER: You need to decompress the image first before loading it into etcher, otherwise it will fail to flash properly!
Click on the image release links in below:
[Apollo II / Apollo BTC MCU 2 Download](
https://www.dropbox.com/scl/fi/us890nz5pjfcpb292rhii/apollo-2-mcu2_031226.img.xz?rlkey=52lazl4f1djt20h8gxnyoep7h&dl=0)
[Solo Node Download](
https://www.dropbox.com/scl/fi/dde0rnsekh7paiwqxlndp/solo-node_031226.img.xz?rlkey=ksak30ypqvbe0yfik033zr7lr&dl=0)
[Apollo BTC MCU 1 Download](
https://www.dropbox.com/scl/fi/zzon1muyh21h3o18v8i6e/apollo-2-mcu1_031226.img.xz?rlkey=h49ehqo5dky72s9yspxfht4ie&dl=0)
If you own an older Apollo BTC, please read SD Card flash instructions and identify MCU1/2 Devices with README below (not relevant for Apollo II units, they are all MCU 2 devices):
[README](
https://mega.nz/file/dghWnKJC#J2kkpfH5RVKynf0OvuE5mKojXdUqAFCczHMyv6mDrM4)
SHA256 SUMS
```
**Apollo 2/Apollo BTC MCU2 Devices**
8522dcedaffdee95aba95127d5e9de1c4f0e76f10eef894333fb088981250b38 apollo-2-mcu2_031226.img.xz
**Solo Node Devices**
89191a31a678970bb9864e8cc39477af2dcd2fa75de0dba7fe17508808fd986f solo-node_031226.img.xz
**Apollo BTC MCU1 Devices**
f9774411ddec233f4a6f946c110c3f3fd58ba7ffafe37b5609b50d1e971334ba apollo-2-mcu1_031226.img.xz
```