When there is only certfile, ssl cannot establish a link. #17096

lbuque · 2025-04-09T03:11:37Z

lbuque
Apr 9, 2025

I am using umqtt to connect to emqx, which requires the use of the ssl module.

mqtt_client = MQTTClient('uf2', 'y90166f4.ala.cn-hangzhou.emqxsl.cn', port=8883, user='test', password='test', keepalive=0, ssl=True, ssl_params={"cert":"/flash/certificate/emqxsl-ca.crt", "server_hostname":'y90166f4.ala.cn-hangzhou.emqxsl.cn'})

I encountered the error below.

ertfile /flash/certificate/emqxsl-ca.crt
keyfile None
Traceback (most recent call last):
  File "<stdin>", line 31, in <module>
  File "<stdin>", line 23, in setup
  File "umqtt/simple.py", line 1, in connect
  File "ssl.py", line 1, in wrap_socket
  File "ssl.py", line 1, in load_cert_chain
TypeError: can't convert 'NoneType' object to str implicitly

shariltumin · 2025-04-09T13:58:46Z

shariltumin
Apr 9, 2025

I've got an idea for a solution you can try. Check out https://github.com/shariltumin/ssl-tls-examples-micropython/tree/main/Mqtt.

0 replies

Provide feedback

Saved searches

Use saved searches to filter your results more quickly

MicroPython

When there is only certfile, ssl cannot establish a link. #17096

Uh oh!

{{title}}

Uh oh!

Uh oh!

{{editor}}'s edit

{{editor}}'s edit

Uh oh!

Replies: 1 comment

Uh oh!

{{title}}

Uh oh!

Select a reply

Uh oh!

MicroPython

When there is only certfile, ssl cannot establish a link. #17096

Uh oh!

Uh oh!

lbuque Apr 9, 2025

Replies: 1 comment

Uh oh!

shariltumin Apr 9, 2025

lbuque
Apr 9, 2025

shariltumin
Apr 9, 2025