Require clarification for External-MQTT Node Certificate/Keys in Rule Chain

[ankushdineshrana]

Component

• Rule Engine

Description I am trying to send data to an external MQTT broker (AWS Greengrass Moquette) using External-MQTT Node of Thingsboard Rule Engine. Here is what I have done:

1. I have checked via python code, that Greengrass moquette setup works fine using CA Certificates (Root & Device) & Private Key.
2. But when I try to do the same with External-MQTT node, it gives error below:

3. Here is what my External-MQTT node setup looks like.

4. I feel like it might be because of mis-match in cert/keys expected formats. The documentation also doesn't specify much about the exact formats for certs/keys i.e. RSA, ECC etc.

Can someone please suggest if anything being missed here or exact formats that I need to upload.

Environment

• OS: Ubuntu on EC2 Instance
• ThingsBoard Server: 3.6.3
• Thingsboard Edge: 3.6.3
• Browser: Chrome Version 123.0.6312.60 (Official Build) (64-bit)

[ankushdineshrana]

@JavierNR @volodymyr-babak @peterchen5 @ashvayka Can you please guide me here.

[volodymyr-babak]

@ankushdineshrana

I'm going to answer this question inside next issue on thingsboard project: https://github.com/thingsboard/thingsboard/issues/10465