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Ray cc2538nf53rtqr: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero bc3b314
{"orientation_deg": 0, "font_size_mm": 0.8215, "reading": {"source": "pin1_xy", "pin1_xy": [-3.938, 3.25], "dot": [-3.3, 3.3], "dot_agrees": true}, "legible_estimate": true, "natural_up": null, "overflow": false}