templateBody.json

{
  "Parameters" : {
     "ThingName" : {
       "Type" : "String"
     },
     "SerialNumber" : {
       "Type" : "String"
     },
     "Location" : {
        "Type" : "String",
        "Default" : "WA"
     },
     "CSR" : {
       "Type" : "String"
     }
  },
  "Resources" : {
    "thing" : {
      "Type" : "AWS::IoT::Thing",
      "Properties" : {
        "ThingName" : {"Ref" : "ThingName"},
        "AttributePayload" : { "version" : "v1", "serialNumber" :  {"Ref" : "SerialNumber"}},
        "ThingTypeName" :  "bulk-type",
        "ThingGroups" : ["bulk-group"]
      }
    },
    "certificate" : {
      "Type" : "AWS::IoT::Certificate",
      "Properties" : {
        "CertificateSigningRequest": {"Ref" : "CSR"},
        "Status" : "ACTIVE"
      }
    },
    "policy" : {
      "Type" : "AWS::IoT::Policy",
      "Properties" : {
        "PolicyDocument": "{\"Version\": \"2012-10-17\",\"Statement\": [{\"Effect\": \"Allow\",\"Action\": [\"iot:*\"],\"Resource\": [\"*\"]}]}"
      }
    }
  }
}