INA3221 Node-RED Component

This Node-RED custom node reads data from the INA3221 triple-channel voltage and current monitor. It provides six outputs, delivering millivolts and milliamps for each of the three channels.

Features

• Six Outputs:
  • Output 1: Voltage (millivolts) for Channel 1
  • Output 2: Current (milliamps) for Channel 1
  • Output 3: Voltage (millivolts) for Channel 2
  • Output 4: Current (milliamps) for Channel 2
  • Output 5: Voltage (millivolts) for Channel 3
  • Output 6: Current (milliamps) for Channel 3
• Configurable I2C address and bus number.
• Adjustable update interval for reading sensor data.

Installation

1. Clone the Repository or Download Files: Place the files in your local Node-RED custom nodes directory: ~/.node-red/nodes/ina3221

2. Folder Structure: Ensure the following files are in the directory: ina3221/ ├── ina3221.js // Node logic ├── ina3221.html // Node editor and help ├── hardware.png // Optional: Node icon

3. Add to a Flow: Drag and drop the INA3221 node into your flow and configure its properties.

Node Properties

| Property | Description | Default Value | |-------------------|-----------------------------------------------------|---------------| | Name | Optional name for the node. | (empty) | | I2C Address | I2C address of the INA3221 sensor. | 0x40 | | I2C Bus | I2C bus number (e.g., 1 for Raspberry Pi). | 1 | | Update Interval | Time (in milliseconds) between sensor readings. | 1000 |

Outputs

| Output # | Description | |----------|------------------------------| | 1 | Voltage (millivolts) - Ch1 | | 2 | Current (milliamps) - Ch1 | | 3 | Voltage (millivolts) - Ch2 | | 4 | Current (milliamps) - Ch2 | | 5 | Voltage (millivolts) - Ch3 | | 6 | Current (milliamps) - Ch3 |

Example Usage

1. Add the Node: Drag the INA3221 node into your flow.

2. Configure the Properties: Set the I2C address, bus number, and update interval in the node editor.

3. Connect Outputs: Connect the outputs to other nodes (e.g., debug nodes or data storage).

Dependencies

• Hardware: INA3221 sensor connected to the I2C bus.
• Node.js Modules:
• i2c-bus: Install using:

npm install i2c-bus

Troubleshooting

• Ensure the INA3221 sensor is properly connected to the I2C bus.
• Check that the I2C address matches the hardware configuration.
• Use i2cdetect to verify the sensor is detected:

sudo i2cdetect -y 1




License
This Node-RED component is released under the MIT License.

Contributing
Contributions are welcome! Feel free to submit issues or pull requests.

Acknowledgments
This component uses the i2c-bus library for I2C communication and is based on the INA3221 triple-channel voltage/current monitor.