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connector-raspberrypi-gpio-usage.py

Sends an input message to the Raspberry Pi GPIO 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/raspberrypi-gpio-connector.html # import greengrasssdk import json iot_client = greengrasssdk.client('iot-data') INPUT_GPIOS = [6, 17, 22] thingName = os.environ['AWS_IOT_THING_NAME'] def get_read_topic(gpio_num): return '/'.join(['gpio', thingName, str(gpio_num), 'read']) def get_write_topic(gpio_num): return '/'.join(['gpio', thingName, str(gpio_num), 'write']) def send_message_to_connector(topic, message=''): iot_client.publish(topic=topic, payload=str(message)) def set_gpio_state(gpio, state): send_message_to_connector(get_write_topic(gpio), str(state)) def read_gpio_state(gpio): send_message_to_connector(get_read_topic(gpio)) def publish_basic_message(): for i in INPUT_GPIOS: read_gpio_state(i) publish_basic_message() def function_handler(event, context): return

Sample Details

Service: greengrass

Last tested: 2019-01-02

Author: AWS

Type: full-example

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