Background: I have a few Marklin turnout decoders, 74462, that I am attempting to control via Raspberry Pi with some Python software I am building from scratch. I am implementing the NMRA standards and can reliably send DCC packets to ESU decoders to control loco, sound, lights, etc and a Bachmann turntable. So I know my set up for packet transmission works well. Question is simple: Does anyone know what packets to send the 74462 to reliably control the turnout? I cannot for the life of me get the decoders to respond to anything. I've read the instruction manual carefully and understand how to set the switches for the address and DCC mode; the decoders are apparently "basic" accessory decoders using "accessory output" method of addressing. I realize that the NMRA specs on accessory decoders are not straightforward, and I have implemented three or four different methods, based on my understanding of the spec, and snooping around other code on GitHub. But no luck. Thanks much for any suggestions.
Folks, I'm embarrassed to say that I have figured out my problem. The accessory packets I was sending were a bit off (literally). Turnouts are working fine now.
