cannot import name UART

这个错误通常是因为你的代码中引用了 `UART`，但是没有正确导入。`UART` 是 PySerial 库中的一个类，它用于与串口进行通信。

你需要在代码的开头添加以下导入语句来解决这个问题：

from serial import UART

如果你没有安装 PySerial 库，你可以通过以下命令来安装：

pip install pyserial

如果你已经安装了 PySerial 库，但是仍然遇到了这个问题，那么你需要检查一下你的代码中是否存在语法错误或者其他导入问题。

相关问题

openmv cannot import name UART

The error message "cannot import name UART" usually occurs when the code is trying to import the UART module from the OpenMV library, but the module is not available. This can happen if the module is not installed or if it is not compatible with the version of OpenMV that you are using.

To fix this error, you can try the following steps:

1. Check that you have the latest version of OpenMV installed. You can download the latest version from the OpenMV website.

2. Make sure that the UART module is installed. You can check this by opening the OpenMV IDE and going to "Tools" -> "Manage Libraries". Look for the UART module and make sure it is installed.

3. If the UART module is not installed, you can install it by clicking on the "Install" button next to it in the "Manage Libraries" window.

4. If the UART module is installed but you are still getting the error, try importing it with a different name. For example, instead of "import UART", you can try "import pyb.UART as UART".

If none of these steps work, you may need to check your code for syntax errors or consult the OpenMV documentation or forum for further assistance.

openmv 报错显示 cannot import name UART

这个错误通常是因为您的代码中使用了打印调试信息的语句，例如 `print()`，但是没有正确导入相应的模块。

针对您的错误信息，`cannot import name UART`，可能是因为您没有正确导入 `UART` 模块。您可以尝试在代码开头添加以下导入语句：

from machine import UART

如果问题仍然存在，请确保您已经正确安装了 `micropython` 库，并检查您的硬件连接是否正确。希望这可以帮助您解决问题。