我正在使用 Cloudformation 模板创建一个堆栈，包括 IoT 车队配置模板，并根据 文档，IoT 配置模板主体应该是字符串类型。
我有这样的物联网车队配置模板：
{
"Parameters": {
"SerialNumber": {
"Type": "String"
},
"AWS::IoT::Certificate::Id": {
"Type": "String"
}
},
"Resources": {
"certificate": {
"Properties": {
"CertificateId": {
"Ref": "AWS::IoT::Certificate::Id"
},
"Status": "Active"
},
"Type": "AWS::IoT::Certificate"
},
"policy": {
"Properties": {
"PolicyName": "mypolicy"
},
"Type": "AWS::IoT::Policy"
},
"thing": {
"OverrideSettings": {
"AttributePayload": "MERGE",
"ThingGroups": "REPLACE",
"ThingTypeName": "REPLACE"
},
"Properties": {
"AttributePayload": {
"SerialNumber": {
"Ref": "SerialNumber"
}
},
"ThingName": {
"Ref": "SerialNumber"
}
},
"Type": "AWS::IoT::Thing"
} …