make monitor error "AttributeError: 'Serial' object has no attribute 'is_open'"

[liuq315]

i am a beginner for developing esp32 platform, when i proceed as list on https://esp-idf.readthedocs.io/en/lates ... -a-project ,

command make monitor does not work, give me a error "AttributeError: 'Serial' object has no attribute 'is_open'"

my environment:
ubuntu 14.04 LTS
pythone: 2.7.6

does anybody else get this error too, help me to fix it, thanks

[ESP_Angus]

Hi liuq,

Thanks for reporting this. Ubuntu 14.04 ships with pyserial 2.6, and it looks like idf_monitor uses some "new style" APIs that were only added after pyserial 3.0.

This is a bug and we'll fix it ASAP.

Angus

[liuq315]

great.

[lmayamaya]

Was it possible to solve it?

[ESP_Angus]

As Ubuntu 14.04 is End Of Life now, we decided to keep the newer API only in esp-idf.

EDIT: My mistake, 14.04 is not EOL until next year. So we will make the required change in ESP-IDF. Although please consider updating your installation to a newer Ubuntu.

If you have Ubuntu 14.04, you can make it work by running these three commands:

Code: Select all

sudo apt-get remove python-serial
sudo apt-get install python-pip
sudo pip install pyserial

(This removes Ubuntu's old copy of pyserial, and installs a version from the Python package manager 'pip'.)

[lmayamaya]

Thanks Angus. What about serial trash like:
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� � ����� n���� ��� ��n߂���b��b#����9O��Ă�#�n�l;|��

When I do MAKE MONITOR it happends. I try to change the clock speed, but the problem continuos in every clock speed.

DO you have another solution for that problem.

Thanks

[ESP_Angus]

Thanks Angus. What about serial trash like:
��n߂���b��b#����9O��Ă�#�n�l;|��
����H���� � � ���n߂���b��bc����9O��Ă�#�n�l{|��
� � ����� n���� ��� ��n߂���b��b#����9O��Ă�#�n�l;|��

When I do MAKE MONITOR it happends. I try to change the clock speed, but the problem continuos in every clock speed.

If you have a 26MHz crystal, you will need to set this in menuconfig:
http://esp-idf.readthedocs.io/en/latest ... l-freq-sel

(The default is 40MHz and will result in a baud rate mismatch.)