Measure TX Power with HTTP Requests

The workflow JSON

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{
  "name": "TX Power Measurement",
  "nodes": [
    {
      "id": "1",
      "name": "Manual Trigger",
      "type": "n8n-nodes-base.manualTrigger",
      "typeVersion": 1,
      "position": [
        240,
        300
      ],
      "parameters": {}
    },
    {
      "id": "2",
      "name": "Connect Sensor",
      "type": "n8n-nodes-base.httpRequest",
      "typeVersion": 4.2,
      "position": [
        460,
        300
      ],
      "parameters": {
        "method": "POST",
        "url": "http://host.docker.internal:8765/connect",
        "sendBody": true,
        "contentType": "json",
        "body": "{}"
      }
    },
    {
      "id": "3",
      "name": "Read Power",
      "type": "n8n-nodes-base.httpRequest",
      "typeVersion": 4.2,
      "position": [
        680,
        300
      ],
      "parameters": {
        "method": "GET",
        "url": "http://host.docker.internal:8765/power"
      }
    },
    {
      "id": "4",
      "name": "Format Result",
      "type": "n8n-nodes-base.set",
      "typeVersion": 3.4,
      "position": [
        900,
        300
      ],
      "parameters": {
        "mode": "manual",
        "assignments": {
          "assignments": [
            {
              "id": "a1",
              "name": "power_dBm",
              "type": "number",
              "value": "={{ $json.value_dbm }}"
            },
            {
              "id": "a2",
              "name": "power_mW",
              "type": "number",
              "value": "={{ $json.value_mw }}"
            },
            {
              "id": "a3",
              "name": "timestamp",
              "type": "string",
              "value": "={{ $now }}"
            }
          ]
        },
        "includeOtherFields": false
      }
    }
  ],
  "connections": {
    "Manual Trigger": {
      "main": [
        [
          {
            "node": "Connect Sensor",
            "type": "main",
            "index": 0
          }
        ]
      ]
    },
    "Connect Sensor": {
      "main": [
        [
          {
            "node": "Read Power",
            "type": "main",
            "index": 0
          }
        ]
      ]
    },
    "Read Power": {
      "main": [
        [
          {
            "node": "Format Result",
            "type": "main",
            "index": 0
          }
        ]
      ]
    }
  },
  "active": false,
  "settings": {
    "executionOrder": "v1"
  }
}

About this workflow

TX Power Measurement. Uses httpRequest. Event-driven trigger; 4 nodes.

Source: https://github.com/YossiAbutbul/rf-instrument-wrappers/blob/main/n8n/power_measurement.json — original creator credit. Request a take-down →

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