Shopify Smiirl Custom Sales Counter

I have a Smiirl physical counter and a Shopify store, and I want the two talking to each other in real time. The goal is simple: every time a sale is recorded in Shopify, the Smiirl flips to show the updated total sales figure.

What I already know I need
• A custom counter setup (not the standard visitor or like versions Smiirl offers).
• The figure shown must be Total sales only; no daily or monthly breakdowns on the flap display.

What I’m expecting from you
1. A small app or script that listens for new orders via Shopify’s Admin or Webhook API and pushes the cumulative sales number to Smiirl’s custom counter endpoint.
2. Clear instructions (or an automated installer) so I can deploy it on my preferred hosting—Heroku, AWS Lambda, or similar—without diving back into the code every time I make a change.
3. Basic error handling and logging so if the Smiirl API is unreachable the count doesn’t fall out of sync.
4. A quick walkthrough when you’re done so I can see the data flow working live.

You can build in the language or framework you’re most comfortable with—Node.js, Python, Ruby, or even a lightweight Shopify App Bridge solution—as long as it’s clean, well-commented, and uses official APIs. If something about my requirements needs clarification, let me know before you start; I’d rather answer questions early than fix surprises later.