1.Press CTRL+T and then CTRL+H in the serial monitor to display -unknown menu character ‘\x7f’ –
* 正在文件夹 demo16_12864(renew) 中执行任务: C:\Users\xiang\.platformio\penv\Scripts\platformio.exe device monitor
--- Terminal on COM3 | 9600 8-N-1
--- Available filters and text transformations: colorize, debug, default, direct, hexlify, log2file, nocontrol, printable, send_on_enter, time
--- More details at https://bit.ly/pio-monitor-filters
--- Quit: Ctrl+C | Menu: Ctrl+T | Help: Ctrl+T followed by Ctrl+H
--- unknown menu character '\x7f' --
--- unknown menu character '\x7f' --
--- unknown menu character '\x7f' --
--- unknown menu character '\x7f' --
--- unknown menu character '\x7f' --
2.How do I permanently enable the echo?