I didn’t get it fully working within Libre as. I couldn’t get the code to remain stable during all the updates.
Instead I found a tool called Integromat (Google it) its like Ifttt or Zapier and allows Webhooks to be sent and received.
I send a push with the payload to Integromat and then split this into two Hangouts Chat rooms via the supported web hook.
Works a dream and depending on the volume of alerts can be free of any costs.
Need support, let me know.
Moving from Slack to Hangouts must be devastating, what’s the reason for the move?