Calling a particle function from a lambda function in aws

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1

additionally how do i see how many publishes i have done of my free tier

2

What error are you getting?

How are you managing the Particle authentication token in the lambda function?

Are you using particle-api-js from your lambda function, or using the API directly?

What is the code in your lambda function (if you can share it)?

3

I couldn’t help myself… I had to ask Chat GPT this question. From what I know about calling functions it’s pretty good:

I asked:
How do I call a particle function from a lambda function in AWS

Chat GPT answered:
To call a Particle function from an AWS Lambda function, you need to make an HTTP request to the Particle Cloud API. Here's a step-by-step guide on how to do it:

  1. Set Up Particle Account and Device:

    • Ensure you have a Particle account and a Particle device (e.g., Photon, Argon) set up and connected.
    • Obtain the device ID and access token from the Particle Console.

  2. Create the Particle Function:

    • Define the function you want to call on your Particle device. This should be done in the firmware code.
    • For example:
      int myFunction(String command) {
    // Function implementation
    return 1;
}

void setup() {
    Particle.function("myFunction", myFunction);
}

  3. Set Up AWS Lambda:

    • Create an AWS Lambda function.
    • Configure the function with the appropriate permissions and roles to access the internet.

  4. Write the Lambda Function Code:

    • Use a programming language supported by AWS Lambda (e.g., Python, Node.js) to make an HTTP request to the Particle Cloud API.

    • Here's an example in Python using the requests library:

      import json
import requests

def lambda_handler(event, context):
    # Particle device details
    device_id = 'your_particle_device_id'
    access_token = 'your_particle_access_token'
    function_name = 'myFunction'
    command = 'your_command'

    # Particle API endpoint
    url = f'https://api.particle.io/v1/devices/{device_id}/{function_name}'

    # Request headers and payload
    headers = {
        'Authorization': f'Bearer {access_token}',
        'Content-Type': 'application/x-www-form-urlencoded'
    }
    payload = {
        'arg': command
    }

    # Make the HTTP POST request to call the Particle function
    response = requests.post(url, headers=headers, data=payload)

    # Handle the response
    if response.status_code == 200:
        result = response.json()
        return {
            'statusCode': 200,
            'body': json.dumps(result)
        }
    else:
        return {
            'statusCode': response.status_code,
            'body': response.text
        }

  5. Deploy and Test the Lambda Function:

    • Deploy your Lambda function in the AWS Management Console.
    • Test the function by invoking it manually or setting up a trigger (e.g., API Gateway, CloudWatch Events).

By following these steps, you can successfully call a Particle function from an AWS Lambda function.

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