1. Applicable mode

1.1 M50s, M31S, M30s, M32 etc.；

1.2 High mode can be only supported, also require the input voltage over than 230VAT;

2. New version highlights

2.1 Support Pool TLS safety transportation protocol;

2.2 Support Low mode;

2.3 Strengthen the safety of firmware: device will reboot 2 times during upgrading,the version name will be end with"NeedUpgradeAgain" at 1st time，please wait for 2nd reboot, after that it will be changed to target version;

2.4 Fixing other bugs;

2.5 Online upgrading to version earlier than 20210602 is prohibit，need to match with tool whatsminertool-8.1.30；

2.6 The WhatsMiner API version is V2.0.4;