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SensorFlow is an open-source IoT backend framework designed to collect sensor data from low-power devices like ESP32 or Raspberry Pi Pico and transmit it to the server using HTTP POST. This post dives into the structure and use cases of the sensorflow-firmware-ethernet project.

🔍 Keywords

SensorFlow, IoT Ethernet Firmware, ESP32, Sensor Data HTTP, Embedded Firmware, sensorflow-firmware-ethernet

1. What is SensorFlow?

SensorFlow is a lightweight IoT solution that collects data from sensors and transmits it to a cloud or server over HTTP POST.

Supported Devices: ESP32, Pico W, etc.

Communication Options: Wi-Fi or Ethernet (e.g., W5500)

Payload Format: JSON over HTTP

Backend Integration: Works with REST APIs in Node.js or Python

2. Project Overview: sensorflow-firmware-ethernet

GitHub Repo: jpaullopes/sensorflow-firmware-ethernet

Main Features:

Ethernet-based networking (e.g., W5500)

Sensor loop management with periodic data transmission

JSON encoding and HTTP POST requests to a backend

// Example: JSON formatting of sensor data
snprintf(data, sizeof(data),
    "{\"temperature\": %.2f, \"humidity\": %.2f}", temp, hum);

3. System Architecture

⚙️ Data Flow

[Sensor] → [Firmware (Ethernet)] → [HTTP POST] → [SensorFlow Server]

📷 Suggested Diagram (with SEO-optimized ALT text)

ALT: "SensorFlow IoT Ethernet firmware block diagram"

Content: Sensor input → JSON encode → Ethernet send → Server receive

4. Backend API Integration

SensorFlow server backend listens for JSON-formatted POST requests.

Sample Route: /api/v1/data

Example Payload:

{
  "temperature": 25.4,
  "humidity": 48.1,
  "timestamp": "2025-07-29T12:30:00Z"
}

Response Handling: Wait for HTTP 200 OK → enter next sensor loop

5. Use Case: ESP32 + W5500 Ethernet Sensor Node

Sensors: DHT22, BH1750, etc.

Board: ESP32 + W5500 Ethernet module

Functionality:

Real-time temperature & humidity monitoring

Reliable data transmission via Ethernet

Server integration via HTTP POST or MQTT

6. Expandability

Add TLS for secure transmission

Support multi-sensor environments

Enable OTA firmware updates

Integrate with Prometheus or Grafana for visualization

🏁 Conclusion: Why SensorFlow Ethernet Firmware Matters

In environments where Wi-Fi is unreliable, wired Ethernet sensor nodes provide a stable alternative.

Open-source and developer-friendly, SensorFlow is easy to adapt and extend.

Ideal for industrial IoT, smart factories, lab environments, and research setups.

📚 References

🔗 SensorFlow Ethernet Firmware GitHub

🔗 SensorFlow Server Overview

🔗 ESP32 + W5500 Example Projects