I want to use SPI in Arduino by DMA moving. I wonder if there is any way to achieve this. Or is Arduino's SPI Class just DMA?

Hello, thank you for your answer. After trying according to your method, the QR code can be successfully output, but the style interval of the QR code is too large to identify the information. How should I solve this problem?

I tried to use the Rainmaker example provided by Arduino-ESP32, but when I ran it, I printed out the result like this. How can I solve this problem?

Hello! Is the binary file that burned with the command-"idf.py encrypted-app-flash" an encrypted binary file or an unencrypted binary file? In other words, is "idf.py encrypted-app-flash" a means of external artificial encryption or internal chip encryption? Thank you!

请问，在启用flash加密后，进行应用程序更新时，采用命令idf.py encrypted-app-flash进行更新，这个命令的生成的二进制文件是已经加密的文件，还是明文二进制文件。

请问碰到这个问题怎么解决

谢谢你的回答，请问冲突的原因是什么呢？

ESP32-Ethernet-kit开发板中如果使esp32模组的IIC的SCL、SDA与phy芯片的MDC、MDIO共用管脚，同时使用IIC和以太网功能他们之间会存在冲突吗？

是的，后来发现是需要外部收发器的原因，已经解决。谢谢