Jasper Grahl

I write about what I learn while building JG Energy – my self-developed energy management system for PV, home battery, wallbox and two EVs. Practical guides, measured data and the pitfalls you won’t find in any manufacturer’s documentation.

Articles

Hyundai Bluelink blocked (error 9035)? Getting your EV's state of charge from the official Pleos API

· 5 min read

Since October 2026 Hyundai blocks unofficial Bluelink access with error 9035. How the official Pleos Vehicle Data API under the EU Data Act works, how to set it up and which pitfalls to watch for.

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