app-dat/OBD-dat/OBD-dat.md
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@@ -66,7 +66,9 @@ Pin 2 (SAE J1850 Bus+): Carries the signal for both PWM and VPW protocols.
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Pin 10 (SAE J1850 Bus-): Used only for the PWM protocol (Ford).
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+## connection and demo
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+https://t.me/electrodragon3/440
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## ref
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