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i want to upgrade MRK 2link to MRK 3link firmware,but PCF7953 chip cannot be recognized. Then how can i degrade MRK 2link firmware?

Question asked by Duo Duo on Mar 28, 2017

i want to upgrade MRK 2link to MRK 3link firmware,but PCF7953 chip cannot be recognized. Then how can i degrade MRK 2link firmware?

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