玩物联网第3期：CH348芯片IO输入输出实测 | GPIO高低电平验证
今天实测 CH348 芯片的输入输出 GPIO 功能，验证端口高低电平触发、输入检测是否正常。
很多朋友只用过它的多串口功能，其实自带的 IO 口也能做简单的控制和检测，视频里分享实测接线和测试逻辑，新手也能看懂。
这是「30 年老电工玩物联网」系列第 3 期，后续会更新更多硬件实测和物联网 DIY 教程，欢迎点赞收藏，有问题评论区交流。
Today we test the GPIO input and output functions of the CH348 chip, verifying high/low level triggering and input detection performance.
Many users only use its multi-serial port feature, but its built-in IO pins can also handle simple control and detection tasks. This video shares practical wiring and testing logic, suitable for beginners.
This is Episode 3 of the "IoT DIY for Electricians" series, with more hands-on hardware tests and IoT DIY tutorials coming soon.