I already have 5 PCA9685 on my layout 0x40 to 0x44, the problem I have is they are run at quite a distance from the Command board like 25 feet from the CSB1 Command ESP32 the I2C connection does go to a TCA9548 MUX the input side is 3.3v and output is 5v and I am using 7 of the channels to split the I2C bus but due to the length of lead i'm having problems with dropping out I do have LCA4311 to boost signal but that seems to help a bit so the Loconet looked a good option but i'm unsure about one of the boards which drives the 2 x PCA9685 as the guy selling is only developing the sketch to operate ...so am looking for other options ...
John