1. Improve temperature data correctness.
2. Remove boot.bin and etc files, enhance reliability about upgrade.
3. Enhance anti-virus capability.
4. Use new build tools to build firmware.
5. If upgrading the firmware through no keeping configuration file, it is need to configure miner account and miner pools to mine, otherwise(Upgrading through using keeping configuration file), it is no need to configure the miner and miner pools using previous miner settings to mine.