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rs232 TXD and RXD
ldeblank@jnv.nl
Junior Member
A simple trick to know what the TXD or RXD lines are for rs232.
Take a digital multimeter and put it between the wire and ground (wire to + of the multimeter and gnd to -) The line that reads about -9 volts dc is the transmit line. Saves a lot of time and changing of connectors.
Good Luck
Take a digital multimeter and put it between the wire and ground (wire to + of the multimeter and gnd to -) The line that reads about -9 volts dc is the transmit line. Saves a lot of time and changing of connectors.
Good Luck
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