Particle Photon 2

Particle Photon 2)

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Installing dependencies

1. Edge Impulse CLI
2. Particle CLI
3. Particle Workbench (Optional, only required if deploying to Particle Library)

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Setup the Particle Photon 2 with the accelerometer and PDM microphone

1. Connect the ADXL362 to the Photon 2 as follows:

2. Connect the microphone to the Photon 2 as follows:

Particle Photon 2 with accelerometer and microphone connected

3. Plug in the USB Cable to the device

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Connecting to Edge Impulse

• Particle Photon2 Firmware.

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Deploying back to device

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Flash a Particle Photon 2 Binary

particle flash --local firmware-particle.bin

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Collecting Data from the Particle Photon 2

1. Create a new Edge Impulse Studio project, remember the name you create for it.
2. Connect your device to the Edge Impulse studio by running following command in a terminal:

edge-impulse-daemon --clean

3. After connecting, the Edge Impulse Daemon will ask to login to your account and select the project. Alternatively, you can copy the API Key from the Keys section of your project and use the —api-key flag instead of —clean.
4. Open your Edge Impulse Studio Project and click on Devices. Verify that your device is listed here.

Photon2 in Devices tab

5. Start gathering data by clicking on Data acquisition

Select Accelerometer and click **Start sampling** to begin collecting IMU data

Select Microphone and click **Start sampling** to begin collecting IMU data

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Next steps: building a machine learning model

• Audio Event Detection with Particle Boards - Particle Project: Doorbell SMS
• Keyword spotting - Particle Project: You’re Muted
• Sound recognition
• Recognize gestures from motion
• Particle Energy Monitoring Demo

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Advanced Deployment

Particle library deployment

1. Open a new VS Code window, ensure that Particle Workbench has been installed (see above)
2. Use VS Code Command Palette and type in Particle: Import Project
   1. Select the project.properties file in the directory that you just downloaded and extracted from the section above.
3. Use VS Code Command Palette and type in Particle: Configure Project for Device
   1. Select deviceOS@5.5.0
   2. Choose a target. (e.g. P2 , this option is also used for the Photon 2).
4. It is sometimes needed to manually put your Device into DFU Mode. You may proceed to the next step, but if you get an error indicating that “No DFU capable USB device available” then please follow these step.
   1. Hold down both the RESET and MODE buttons.
   2. Release only the RESET button, while holding the MODE button.
   3. Wait for the LED to start flashing yellow.
   4. Release the MODE button.
5. Compile and Flash in one command with: Particle: Flash application & DeviceOS (local)

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Data ingestion via Particle webhook

1. Access Particle Console:
   • Visit Particle Console.
   • Log in with your Particle account credentials.
2. Navigate to Integrations:
   • Click on the “Integrations” tab in the left-hand menu.
   • Select “Webhooks” from the available options.
3. Create a New Webhook:
   • Click “New Integration”.
   • Choose “Webhook”.
4. Webhook Configuration:
   • Name: Assign a descriptive name to your webhook.
   • Event Name: Specify the event name that triggers the webhook (e.g., “edge/ingest”).
   • URL: Set this to the Edge Impulse ingestion API URL, typically something like https://ingestion.edgeimpulse.com/api/training/data.
   • Request Type: Choose “POST”.
   • Request Format: Select “Custom”.
5. Custom Request Body:
   • Input the JSON structure required by Edge Impulse. This will vary based on your project’s data schema.
6. HTTP Headers:
   • Add necessary headers:
     • x-api-key: Your Edge Impulse API key.
     • Content-Type: “application/json”.
     • x-file-name: Use a dynamic data field like {{PARTICLE_EVENT_NAME}}.
7. Advanced Settings:
   • Response Topic: Create a custom topic for webhook responses, e.g., {{PARTICLE_DEVICE_ID}}/hook-response/{{PARTICLE_EVENT_NAME}}.
   • Enforce SSL: Choose “Yes” for secure transmission.
8. Save the Webhook:
   • After entering all details, click “Save”.
9. Test the Webhook:
   • Use example device firmware to trigger the webhook.
   • Observe the responses in the Particle Console.
10. Debugging:

• If errors occur, review the logs for detailed information.
• Ensure payload format aligns with Edge Impulse requirements.
• Verify the accuracy of your API key and other details.

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Custom Template Example

{
    "name": "edgeimpulse.com",
    "event": "edge/ingest",
    "responseTopic": "",
    "disabled": true,
    "url": "http://ingestion.edgeimpulse.com/api/training/data",
    "requestType": "POST",
    "noDefaults": true,
    "rejectUnauthorized": false,
    "headers": {
        "x-api-key": "ei_1855db...",
        "x-file-name": "{{PARTICLE_EVENT_NAME}}",
        "x-label": "coffee"
    },
    "json": "{\n  \"payload\": {\n    \"device_name\": \"0a10a...\",\n    \"device_type\": \"photon2\",\n    \"interval_ms\": 20,\n    \"sensors\": [\n      {\n        \"name\": \"volt\",\n        \"units\": \"V\"\n      },\n      {\n        \"name\": \"curr\",\n        \"units\": \"A\"\n      }\n    ],\n    \"values\": [\n{{{PARTICLE_EVENT_VALUE}}}\n    ]\n  },\n  \"protected\": {\n    \"alg\": \"none\",\n    \"ver\": \"v1\"\n  },\n  \"signature\": \"00\"\n}"
}

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Lifecycle management and OTA (over-the-air) updates

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Troubleshooting