For anyone wanting to interface with INDI programmatically, but doesn't want to get into C/C++, I've created a node.js client for INDI. It translates the XML to a more node friendly JSON, supports BLOBs, and can read driver state and send commands.

Have a look here: www.npmjs.com/package/indi-client

There is an example in the readme for hooking up INDI to an MQTT broker for distributed messaging of all INDI data.

Bravo! You're on a roll Rick, great job with all these additions to INDI!