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}