Endless loop of disconnect and reconnect with error code 1 [RESOLVED]

Bugs / Issues Resolved
1

I am getting stuck in a endless disconnect reconnect loop using Cayenne-MQTT-Python. The disconnect code is 1 which is ‘unacceptable protocol version.’ I am using the latest version having cloned the repository only a few days ago. I had it connected and working only yesterday.

Using Raspberry Pi 3 with Python MQTT library.

Using web interface (I don’t know why this would matter.)

My code is here

I have made a small modification to the library in order for it to connect at all. Before this it gave a not enough arguments error and refused to connect at all.

2

It appears all is working now, not that I’ve changed anything. Did someone change the server?

3

Not that I’m immediately aware of, and in fact I had another user via email who reported similar behavior. Please let me know if it returns or is an intermittent issue.

4

I think I have the same problem right now. I am using the Texas Instruments CC3200 Launchpad, and the associated library:

And I am running a simple example code that came with it. I am successfully connected to wifi but not MQTT.

5

Hi @david.malawey, can I ask if this is something that was previously connected to the Cayenne dashboard OK (in that it at least advanced beyond the screen with the MQTT Username/Password/Client ID and gave you a dashboard? Or is this something that has failed to connect since you started using it?

6

This is a device that previously gave me a dashboard and had sent values and received commands from a slider widget (about 2 weeks ago).

7

Thanks, could you share the code you’re using (you can blank out the MQTT Username/Password/Client ID) and any output from the Serial Monitor showing these disconnects?

8

Here’s the serial monitor:

[3468] Connected to WiFi
[3478] IP: 0.0.0.0
[3499] Connecting to mqtt.mydevices.com:1883
[34227] MQTT connect failed, error -1
[65967] MQTT connect failed, error -1

And the code is attached.

9

I don’t see the code attached (if you were emailing in reply, I don’t think the forum software is smart enough to attach it to a post).

However, just from that output I suspect the issue is that your IP address is 0.0.0.0 – I’m guessing that DHCP on the wifi router it’s connected to is not assigning an IP properly to the device.

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10

I’ll look into this and get back to you. Thanks!

11

Confirmed the issue was my AT&T cellular wifi device. I have two. One is not working, and the other is working fine. Thanks!

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