How to disable schema Avro?

[SarindraTherese]

When I read topic after use your elasticsearch source connector, I have value like this:

{"schema":
    {"type":"struct",
    "fields":[
        {"type":"string","optional":true,"field":"nature"},
        {"type":"string","optional":true,"field":"description"},
        {"type":"string","optional":true,"field":"threshold"},
        {"type":"string","optional":true,"field":"quality"},
        {"type":"string","optional":true,"field":"rowid"},
        {"type":"string","optional":true,"field":"avrotimestamp"},
        {"type":"array","items":{"type":"string","optional":true},"optional":true,"field":"null"},
        {"type":"string","optional":true,"field":"domain"},
        {"type":"string","optional":true,"field":"name"},
        {"type":"string","optional":true,"field":"avroversion"},
        {"type":"string","optional":true,"field":"esindex"},
        {"type":"string","optional":true,"field":"value"},
        {"type":"string","optional":true,"field":"chrono"},
        {"type":"string","optional":true,"field":"esid"},
        {"type":"string","optional":true,"field":"ts"}],"optional":false,"name":"demofilter"},
    "payload":
    {
        "nature":"R01",
        "description":"Energy",
        "threshold":"","quality":"192",
        "rowid":"34380941",
        "avrotimestamp":"2022-09-20T04:00:11.939Z",
        "null":["TGT BQ 1B"],
        "domain":"CFO",
        "name":"RDC.R01.RED.MES",
        "avroversion":"1",
        "esindex":"demo_filter",
        "value":"4468582",
        "chrono":"133081200000000000",
        "esid":"nuWIrYMBHyNMgyhJYscV",
        "ts":"2022-09-20T02:00:00.000Z"
    }
}

My question is can I configure the format to json in file json properties?
The only output i need is like this:

    {
        "nature":"R01",
        "description":"Energy",
        "threshold":"","quality":"192",
        "rowid":"34380941",
        "avrotimestamp":"2022-09-20T04:00:11.939Z",
        "null":["TGT BQ 1B"],
        "domain":"CFO",
        "name":"RDC.R01.RED.MES",
        "avroversion":"1",
        "esindex":"demo_filter",
        "value":"4468582",
        "chrono":"133081200000000000",
        "esid":"nuWIrYMBHyNMgyhJYscV",
        "ts":"2022-09-20T02:00:00.000Z"
    }

thanks

[DarioBalinzo]

Hi,
you can use this settings that works on all connectors (not just this one):

In particular you can set
key.converter to org.apache.kafka.connect.json.JsonConverter as explained here: https://www.confluent.io/blog/kafka-connect-deep-dive-converters-serialization-explained/