1. Applicable mode

1.1 M21S, M20S, M21,etc;

1.2 High mode can not be supported;

1.3 Teaching video: https://youtu.be/L-gpDzD9YCU

2. New version highlights

2.1 Support Pool TLS safety transportation protocol;

2.2 If the miner firmware is before 2021, it is recommended to upgrade the firmware after SD-card flashing;

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，suggest to match with tool whatsminertool-8.1.34;

2.6 The WhatsMiner API version is V2.0.5;

一、适用机型

1、M21S、M20S、M21等机型；

2、不支持高性能模式；

二、新版本亮点

1、支持矿池TLS安全传输协议；

2、加强矿机固件安全；

3、解决了特定BUG；

4、建议配合新版工具whatsminer tool8.1.34使用，且升级之后，限制回退到旧版本(20210602及之前的版本）；

5、如果机器固件在2021年前，建议卡刷后，再进行升级此固件；

6、如果机器固件在2021年9月前，升级固件过程中会重启两次，第一次重启时，版本号末尾带有NeedUpgradeAgain，请等待第二次自动重启，重启之后就变为目标版本