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connector-modbus-rtu-usage.py

Sends an input message to the Modbus-RTU Protocol Adapter connector.

# Copyright 2010-2019 Amazon.com, Inc. or its affiliates. All Rights Reserved. # # Licensed under the Apache License, Version 2.0 (the "License"). You # may not use this file except in compliance with the License. A copy of # the License is located at # # http://aws.amazon.com/apache2.0/ # # or in the "license" file accompanying this file. This file is # distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF # ANY KIND, either express or implied. See the License for the specific # language governing permissions and limitations under the License. # # This sample is used in the AWS IoT Greengrass Developer Guide: # https://docs.aws.amazon.com/greengrass/latest/developerguide/modbus-protocol-adapter-connector.html # import greengrasssdk import json TOPIC_REQUEST = 'modbus/adapter/request' # Creating a greengrass core sdk client iot_client = greengrasssdk.client('iot-data') def create_read_coils_request(): request = { "request": { "operation": "ReadCoilsRequest", "device": 1, "address": 0x01, "count": 1 }, "id": "TestRequest" } return request def publish_basic_request(): iot_client.publish(payload=json.dumps(create_read_coils_request()), topic=TOPIC_REQUEST) publish_basic_request() def function_handler(event, context): return

Sample Details

Service: greengrass

Last tested: 2019-02-19

Author: AWS

Type: full-example

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