@gallopingsloth said in M5 atom lite connector.: I learned all this the hard way after buying a bunch of now useless PH-2.0 4 pin cables. What do you mean by Useless PH-2.0 4 Pins? Grove cables are fully compatible with M5Stack products and HY connectors are compatible with PH as long as they are 2.0 pin spacings. the only difference is that some are flat topped, some have locating fins and some have clips. I have a selection of various types and have even modded several including posting a guide and a comparison on the forum of the difference. There was some confusion at one point with the White and yellow wires reversed but that has been solved and its not hard to swap the pins in the housing as again I have made a guide on it.