I've got an Amplus AM03128-H11 LED display, without the documentation and serial cable.
I found the programming manual online, but I have no idea what the pinout on the serial RJ11 connector is supposed to be.
Anyone out there who knows ?
Or who has one of these devices and is willing to check the wiring for me?
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\$\begingroup\$ <Looking in crystal ball> Nope, nothing. Either find a datasheet or reverse engineer it by tracing out the connections. If you're lucky the pinout is marked on the PCB. \$\endgroup\$– BimpelrekkieCommented Dec 5, 2017 at 12:38
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\$\begingroup\$ @Bimpelrekkie Give me some credit :-) I already checked the PCB. Tick layer of black glue/paste covers everything. My Google-fu is failing me on the datasheet. Have no trouble finding sample-code to control that display, but everyone seems to assume that you will have the supplied serial cable that came with the thing. And manufacturer doesn't respond to emails. \$\endgroup\$– TonnyCommented Dec 5, 2017 at 13:25
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\$\begingroup\$ Email to Amplus...? \$\endgroup\$– FinbarrCommented Dec 7, 2017 at 17:40
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\$\begingroup\$ Guessing this is some obscure de facto standard: asayo.com/images/products/led-sign-cable/cable-spec.jpg 2,3,4 are RX, TX, GND \$\endgroup\$– τεκCommented Dec 7, 2017 at 17:41
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\$\begingroup\$ Quick test with a meter may help to see if that's correct. \$\endgroup\$– FinbarrCommented Dec 7, 2017 at 17:45
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