Shelly Pro Modbus Add-on RS485

I was a bit worried about wiring it wrong, but the terminals are clearly labeled and the integration with the Pro system was genuinely plug-and-play. Modbus polling now works flawlessly for my energy meters, and the response time feels snappier than my old USB adapter.

Setup took me under ten minutes and the connection to my Shelly Pro was rock solid from the first try. The RS485 terminals feel sturdy and the Modbus polling has been flawless for three weeks now.

I was worried about getting Modbus working on my Pro setup, but this add-on made the whole thing painless once I wired the RS485 terminals. The integration with the Pro devices was exactly as described, and it's been rock solid for two weeks now. Great if you need to pull data from energy meters or