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Which direction is TX and RX on BotBlox hardware?

Question copied from a customer query on Tindie

The pins are named as RX+, RX- …etc. It is OK. But from which side is considered the function… I mean, RX+/RX- is input, it means here should be connected TX+ / TX- the output of other LAN device or RX+/RX- means output and RX+/RX- of other device should be connected to these pins?

The assumption above is correct.

TX on BotBlox hardware is the transmitted signal (output) from the switch to the connected device. It should be connected to RX on whatever is connected to SwitchBlox.

RX on BotBlox hardware is the received signal (input) to the switch from the connected device. It should be connected to TX on whatever is connected to SwitchBlox.

Some things to note:

  1. All BotBlox hardware uses Auto-MDIX to automatically detect if the signals are connected incorrectly, and then switch over the direction of the ports. This is very common in modern ethernet devices, and means it actually doesn't matter if you connect it the wrong way round. For good practice though, you should always try to connect it correctly.
  2. The included cable sets put the RX and TX signals on the correct pins of an RJ45 cable, so you shouldn't need to worry about the pins unless you're making your own cables.