A TTL-RS232 level converter that connects via Grove
(using a similar design to the Mini CAN Unit: https://shop.m5stack.com/products/mini-can-unit-tja1051t-3)
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Best posts made by Sereneto
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[Product] RS232 in Grove Unit Format
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[Product Revision] ATOMIC TF-Card Reader (A135) with G39/G38 exposed as Grove
ATOMIC TF-Card Reader A135, but expose pins G39 & G38 as an Grove port.