https://templates.blakadder.com/gosund_SP112_v3_4.html

GPIO # Component
GPIO00 Led1i
GPIO01 None
GPIO02 Led2i
GPIO03 None
GPIO04 HLWBL CF1
GPIO05 BL0937 CF
GPIO09 None
GPIO10 None
GPIO12 HLWBL SELi
GPIO13 Relay2i
GPIO14 Relay1
GPIO15 None
GPIO16 None
FLAG Button

{"NAME":"Gosund 112v3.4","GPIO":[56,0,57,0,132,134,0,0,131,30,21,0,0],"FLAG":4,"BASE":18}

after entering into interface following config is enabled:

{"NAME":"Gosund 112v3.4","GPIO":[320,0,321,0,2656,2720,0,0,2624,257,224,0,0,4800],"FLAG":0,"BASE":18}