FreeRTOS 的消息队列控制块由多个元素组成，当消息队列被创建时，系统会为控制块分配对应的内存空间，用于保存消息队列的一些信息如消息的存储位置，头指针 pcHead、尾指针 pcTail、消息大小 uxItemSize 以及队列长度 uxLength 等。

Northwestern University’s Embedded Electronics Class delivered a bumper crop of ESP-32 projects this year. The student teams recorded their progress on hackaday.io with project descriptions ...

While they differ a lot in terms of functionality, you can combine the IoT-centric ESP32 boards with the all-powerful Raspberry Pi SBC family to build some truly remarkable DIY projects.

With an Adafruit Feather ESP32, custom motor controller board, and NEMA 8 steppers with 3D printed Technic adapters, this little tank has a lot more going on under the hood than you might expect.