I just build my redox keyboard and I found a problem about the right hand side is not working when connecting via the TRRS cable
this post was submitted on 23 Jul 2023
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The soldering work looks pretty rough (practice on a throwaway project first). Probably one of the TRRS or MCU pins is not well connected. Get out a multimeter and do a continuity check of all the connections. It could also be misconfiguration of QMK, but make sure the basics (hardware connections) are right first.