aws javascript sdk registerThing template body does not accept valid json string

Question

I am passing template json to the registerThing function as shown in below code part.

const templateJson = {"Parameters":{"Attr1":{"Type": "String"},"Attr2": {"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": {"PolicyDocument": "<<Inline olicy document>>"},"Type": "AWS::IoT::Policy"},"thing": {"OverrideSettings":{"AttributePayload": "MERGE","ThingGroups": "DO_NOTHING","ThingTypeName": "REPLACE"},"Properties":{"AttributePayload":{},"ThingGroups":["mygroup"],"ThingName": {"Ref": "SerialNumber"},"ThingTypeName": "testname"},"Type": "AWS::IoT::Thing"}},"DeviceConfiguration":{}};

const provisionTemplateBody = JSON.stringify(templateJson);

And then using this to construct function parameters as

 var paramsRegisterThing = {
        templateBody: provisionTemplateBody,
        parameters: provisioningTemplateParams
    };

When calling registerThing with this, I get exception as below

"errorType": "InvalidRequestException",
  "errorMessage": "Invalid registration template. Template format error: unsupported type or structure...

I have already added JSON.stringify as suggested in some other questions here on stackoverflow, but it does not help.

How can I make this work? Or is there any other way to pass template name or ARN instead of body to register thing?

Answer 1

Few things I noticed:

• Remove empty block of DeviceConfiguration
• There is Ref to SerialNumber , which is missing in Parameter block.
• You have two other attributes Attr1 & Attr2 in parameters which are not actually used in Resources block.

If both template and parameters are two Javascript objects. templateBody should be a sting and parameters should be key-value map.

 iot.registerThing(
      {
        templateBody: JSON.stringify(template1),
        parameters: parms,
      },
      function (err, data) {}
 )