I’m not the person to talk to about the technical stuff at all. but to shed some light, I share some insights as I have various of these modules connected together.
As mentioned already, the monome(ish) i2c ecosystem grew around the monome teletype module. teletype (tt) is in the “official” monome implemention the only module that acts as a master, all the rest are slaves (at lines people prefer the terminology leader/follower, for reasons of the cruel connotation of the former). the current implementation of the i2c bus doesn’t really handle having multiple leaders on the same bus. though recently there have been community projects (poly earthsea & faderbank) which allows leader functionality for other modules/devices too. it has been reported that it can even coexist well with teletype on the same i2c bus.
The quickest thing to do from the nerdseq point of view would to send the same er301 relevant messages to the bus as the teletype command SC.TR and SC.CV do, each on channels 1-100(iirc).
As an owner of various monome and mannequins modules (just friends and w/ also respond to tt commands), I’m intrigued to think about the possibilities if the nerdseq could talk to all of them. but the commands are, unlike the er301 ones, very specific to the sequencers/functionality of the various modules, each having their set of specific commands they understand. of course I would love to think about scrolling through all possible endpoints and commands on the nerdseq! but the one with the best ROI I believe is supporting the er301, as it’s so flexible. another very interesting one would be mannequins just friends, as it can act as 6 individual voices via i2c. maybe it makes more sense to support all tt i2c devices/commands after all for consistency? or having a config on the sd card which can be adapted at need? just thinking out loud here.
I’m sure tehn or others over at lines will be glad to help with questions. I’d hoped @scanner_darkly could chime in, the author of poly earthsea and other firmware goodness in the ecosystem. or @bpcmusic, the creator of the tt expanders (telex) .
Last but not least, thank you so much for even considering doing this! I bet you would make a lot of people very happy. definitely me.
(and huge thanks to @tekzon for initiating this!)
forgot: would be happy to help with testing of course