{"NAME":"Meross MSS426","GPIO":[320,0,262,0,229,228,0,0,225,226,224,227,32,0],"FLAG":0,"BASE":18}

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This device uses MR3E module which needs to be replaced with an ESP. Besides the module, this process will require a heat gun, soldering tools and moderate soldering skill.

You need a size 2.0 triangle bit to open the case. The screws are under rubber stoppers, a fine screwdriver or needle pulls them out. In addition, the underside is clipped in.

Successfully opened you can remove the existing MR3E and replace with an ESP-12.