I confirm that General_MHKWIFI_IPC_HI3518E_50H10L_S38_RT3070_V4.02.R12.Nat.OnvifS.20160604_ALL.bin Uploaded by @sp9dlm WORKS perfect with WIFI. I updated to latest General_HZXM_IPC_HI3518E_50H10L_S38_V4.02.R12.Nat.OnvifS.20170727_ALL.bin but I lost WIFI...
So please note...