dokytree/samples/it_v1/schemas_builder/parts/wifi.json

{
	"$schema": "http://json-schema.org/draft-07/schema#",
	"properties": {
		"ssid": {
			"oneOf": [
				{"type": "string"},
				{"enum": [
					"''"
				]}
			]
		},
		"key": {
			"oneOf": [
				{"type": "string"},
				{"enum": [
					"''"
				]}
			]
		}
	}
}