Have a 6 series roomba which didn’t have wifi support. Having HA wanted to implement a smarter solution - start when nobdy is home. Well simply said it was easier than i thought. All is needed - a buck converter
like this Aliexpress
And a wemos d1 mini which is an esp 8266 development board.
Need to solder only 6 wires.
From what i have seen on the internet - this adaptation always had several boards stuck out of the case or an ugly overhead construction. Really don’t understand why. Just use cat5 wire dor wiring and stick it into the din slot. And the buck and wifi board go to the niche near the wheel (do not disconnect the power socket from there. Just leave it there) The cover fits nicely like it was there
The only problem - all i could find for the code was github below. And although it is ok - has only 2 commands (clean and dock). So if anybody has a better code or knows off an interesting project which also proveides sensor readings - please share