IOT Core: UpdateThingShadowRequest returning InvalidArgumentsError when using a JSON structure that is complex than the standard examples.

Question

Hi,

I am implementing a python based greengrassv2 script that is updating a Named Shadow on the IOT thing. My script is able to update the device shadow as expected with a basic json based string from the examples. However, when I try to update the device shadow with a slight more complex json structure the follow code throws an InvalidArgumentsError. If I manually paste in the jsons thing into the AWS console it updates fine.

```
        # retrieve the UpdateThingShadow response after sending the request to the IPC server
        op = ipc_client.new_update_thing_shadow()
        op.activate(update_thing_shadow_request)

```
Here is the slightly more complex json structure that causes the update_thing_shadow_request to throw the InvalidArgumentsError.

Any ideas what could be the issue? I dont have much flexibility with the structure as it comes from the CSA standard for matter. I am trying to implement named shadows to hold device state information for devices that use the matter smart home standard. The json data structure is set by the connectivity standard alliance CSA

`
{
  "state": {
    "reported": {
      "0": {
        "GeneralDiagnostics": {
          "GeneralDiagnostics.DataVersion": 2765750396,
          "NetworkInterfaces": [
            {
              "name": "docker0",
              "isOperational": false,
              "offPremiseServicesReachableIPv4": {},
              "offPremiseServicesReachableIPv6": {},
              "hardwareAddress": "02428a9277b4",
              "IPv4Addresses": [
                "ac110001"
              ],
              "IPv6Addresses": [
                ""
              ],
              "type": 0
            },
            {
              "name": "wlo1",
              "isOperational": true,
              "offPremiseServicesReachableIPv4": {},
              "offPremiseServicesReachableIPv6": {},
              "hardwareAddress": "142d27de389b",
              "IPv4Addresses": [
                "c0a80088"
              ],
              "IPv6Addresses": [
                "2a02808481a2b900464020a0eb11f9d7",
                "2a02808481a2b900afa9aa386c61107e",
                "fe80000000000000cbd7a0f35f43e4fa"
              ],
              "type": 1
            },
            {
              "name": "eno1",
              "isOperational": false,
              "offPremiseServicesReachableIPv4": {},
              "offPremiseServicesReachableIPv6": {},
              "hardwareAddress": "6cc217716cb7",
              "IPv4Addresses": [],
              "IPv6Addresses": [],
              "type": 2
            },
            {
              "name": "lo",
              "isOperational": true,
              "offPremiseServicesReachableIPv4": {},
              "offPremiseServicesReachableIPv6": {},
              "hardwareAddress": "000000000000",
              "IPv4Addresses": [
                "7f000001"
              ],
              "IPv6Addresses": [
                "00000000000000000000000000000001"
              ],
              "type": 0
            }
          ],
          "RebootCount": 1,
          "UpTime": 101,
          "TotalOperationalHours": 0,
          "BootReason": 0,
          "ActiveHardwareFaults": [],
          "ActiveRadioFaults": [],
          "ActiveNetworkFaults": [],
          "TestEventTriggersEnabled": false,
          "FeatureMap": 0,
          "ClusterRevision": 1,
          "GeneratedCommandList": [],
          "AcceptedCommandList": [
            0
          ],
          "EventList": [
            0,
            1,
            2,
            3
          ],
          "AttributeList": [
            0,
            1,
            2,
            3,
            4,
            5,
            6,
            7,
            8,
            65528,
            65529,
            65530,
            65531,
            65532,
            65533
          ]
        }
      }
    }
  }
}
`

Any advice or help would be greatly appreciated

MassimilianoAWS · Answer

I tried to reproduce your operation on my device and everything works fine using the following code:

```
from awsiot.greengrasscoreipc.clientv2 import GreengrassCoreIPCClientV2
import os
import json

client = GreengrassCoreIPCClientV2()
shadow = {...} # the large CSA shadow
client.update_thing_shadow(thing_name=os.environ['AWS_IOT_THING_NAME'], payload=bytes(json.dumps(shadow), 'utf8'), shadow_name='')
```

Note: if you want to quickly experiment and test code for Greengrass, have a look at the following component: https://github.com/awslabs/aws-greengrass-labs-jupyterlab.

IOT Core: UpdateThingShadowRequest returning InvalidArgumentsError when using a JSON structure that is complex than the standard examples.

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