<![CDATA[MQTT connection]]>I'm having difficulty connecting my Core Basic to MQTT using UIFlow 2.0. Here are the pertinent code blocks:
uiflow_setup.png
uiflow_subscribe.png

When I run it, I get the following error.

umqtt.py line 71. in connectOSerror: -203

Looking at the github, this line is the middle line of this statement for the connection procedure Connect():

if self.user is not None:
    sz += 2 + len(self.user) + 2 + len(self.pswd)
    msg[6] |= 0xC0

It also references the line of code for this connection block in my setup:

mqtt_client.connect(clean_session=True)

I'm trying to connect to a Mosquitto broker on a raspberry pi that allows anonymous connection (no user/pass). It appears that error stems from the user/pass variables, but they are set as None in the block so why does this even trigger? Regardless, I'm at an impasse here on how to solve the issue. Any help would be appreciated.

]]>https://community.m5stack.com/topic/6812/mqtt-connectionRSS for NodeFri, 17 Apr 2026 10:03:31 GMTWed, 18 Sep 2024 01:21:54 GMT60<![CDATA[Reply to MQTT connection on Wed, 25 Sep 2024 07:34:14 GMT]]>Hello @travisstdenis

thank you for reporting back. I am glad to hear you got it working.

Thanks
Felix

]]>https://community.m5stack.com/post/26503https://community.m5stack.com/post/26503Wed, 25 Sep 2024 07:34:14 GMT<![CDATA[Reply to MQTT connection on Wed, 25 Sep 2024 01:33:07 GMT]]>@felmue that worked! So it was just the addition of those other WiFi blocks that did it. The Serial output had said Wifi connected before, but I guess not.

]]>https://community.m5stack.com/post/26499https://community.m5stack.com/post/26499Wed, 25 Sep 2024 01:33:07 GMT<![CDATA[Reply to MQTT connection on Wed, 25 Sep 2024 04:32:26 GMT]]>Hello @travisstdenis

please have a look at my example for test.mosquitto.org and io.adafruit.com in the UIFlow2 Project Zone called: M5Core_MQTT_WLAN_UIFlow2.1.4

Thanks
Felix

]]>https://community.m5stack.com/post/26497https://community.m5stack.com/post/26497Wed, 25 Sep 2024 04:32:26 GMT<![CDATA[Reply to MQTT connection on Tue, 24 Sep 2024 21:16:17 GMT]]>@ajb2k3 I have the "MQTT Apply For Messaging" block in the Loop. Everything I have seen has the connection parts in the Setup. Are you saying I need to have the MQTT Init block from the setup in the Loop?

]]>https://community.m5stack.com/post/26496https://community.m5stack.com/post/26496Tue, 24 Sep 2024 21:16:17 GMT<![CDATA[Reply to MQTT connection on Tue, 24 Sep 2024 21:14:13 GMT]]>@felmue i couldn't get a connection to test.mosquitto.org but i could for Adafruit. I setup this connection
uiflow_setup_2.png

I get a nonsense error on the screen about some unrelated rectangle UI block in the setup about

TypeError: extra keyword arguments given

When I look at the serial data i get:

>>> E (8014) mqtt_client: Error create mqtt task
E (23515) mqtt_client: esp_mqtt_client_init(800): Memory exhausted
E (23515) mqtt_client: Client was not initialized
E (23516) mqtt_client: Client was not initialized

I have tried this several ways. with and without the https:// in the server, with keepalive values of 0 or 300, in and out of the "if connected to wifi" block. The image shows the only way I've gotten some kind of response that gets me closer.

]]>https://community.m5stack.com/post/26495https://community.m5stack.com/post/26495Tue, 24 Sep 2024 21:14:13 GMT<![CDATA[Reply to MQTT connection on Thu, 19 Sep 2024 04:58:19 GMT]]>@travisstdenis The connection blocks need to bee in the loop not the setup.

]]>https://community.m5stack.com/post/26466https://community.m5stack.com/post/26466Thu, 19 Sep 2024 04:58:19 GMT<![CDATA[Reply to MQTT connection on Wed, 18 Sep 2024 14:36:48 GMT]]>Hello @travisstdenis

have you tried to connect to test.mosquitto.org? Does that work or are you getting the same error?

Thanks
Felix

]]>https://community.m5stack.com/post/26462https://community.m5stack.com/post/26462Wed, 18 Sep 2024 14:36:48 GMT