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by kotaKat
42 days ago
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Funny - in the retail industry, we use a 1/4" jack instead that runs straight RS232 level traffic (for "DEX" - data exchange - typically sending invoices to a merchant from a route driver, or pulling data from vending machines on a route). ........ and the DEX pinout has Rx/Tx in reverse (our tip receives and our ring transmits) in comparison to the FTDI TTL setup. Wellp! |
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https://en.wikipedia.org/wiki/DEX_(protocol)
https://www.cable-tester.com/dex-connector-pin-out/
https://www.storedex.com/abcs-of-dex