
Not sure if right sub, if not can you let me know what might work.I need a Audio jack input from the output of button More specifically"an OPEN/CLOSED or HEADSET_HOOK signal must be fed down the mic channel of the TRRS audio socket."I need it to control an app on a phone. I was wondering if anyone knew of products which already did this or something similar?The button needs to be held in the hand and connected to the phone by a cable.Can anyone suggest any options? Edit: I need a 3.5mm connection which opens the headphone input when pressing a button... Hope that makes sense via /r/DIY https://ift.tt/2ynEdtl