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README.md

Node-RED + DIO nodes

Made for netPI, the Raspberry Pi 3B Architecture based industrial suited Open Edge Connectivity Ecosystem

Debian with Node-RED and DIO nodes for NIOT-E-NPIX-4DI4DO expansion module

The image provided hereunder deploys a container with installed Debian, Node-RED and dio nodes to communicate with expansion modules NIOT-E-NPIX-4DI4DO.

Base of this image builds debian with installed Internet of Things flow-based programming web-tool Node-RED and two extra nodes dio in/out providing access to the 4 digital input and 4 digital output signals of the module NIOT-E-NPIX-4DI4DO over the GPIOs 22,23,25,26, 4, 14, 15, 17 and 27.

ATTENTION! Never plug or unplug any extension module if netPI is powered. Make sure a module is already inserted before applying 24VDC to netPI.

Container prerequisites

Port mapping

To allow the access to the Node-RED programming tool over a web browser the container TCP port 1880 needs to be exposed to the host.

Privileged mode

Only the privileged mode option lifts the enforced container limitations to allow usage of GPIOs in a container needed for the nodes dio in/out.

Getting started

STEP 1. Open netPI's landing page under https://<netpi's ip address>.

STEP 2. Click the Docker tile to open the Portainer.io Docker management user interface.

STEP 3. Enter the following parameters under Containers > Add Container

  • Image: hilschernetpi/netpi-nodered-npix-io

  • Port mapping: Host "1880" (any unused one) -> Container "1880"

  • Restart policy" : always

  • Runtime > Privileged mode : On

STEP 4. Press the button Actions > Start/Deploy container

Pulling the image may take a while (5-10mins). Sometimes it takes so long that a time out is indicated. In this case repeat the Actions > Start/Deploy container action.

Accessing

After starting the container open Node-RED in your browser with http://<netpi's ip address>:<mapped host port> e.g. http://192.168.0.1:1880. Two extra nodes dio in/out in the nodes npix library provides you access to the 4 digital input and 4 digital output of the NPIX module. The nodes' info tab in Node-RED explains how to use them.

Automated build

The project complies with the scripting based Dockerfile method to build the image output file. Using this method is a precondition for an automated web based build process on DockerHub platform.

DockerHub web platform is x86 CPU based, but an ARM CPU coded output file is needed for Raspberry systems. This is why the Dockerfile includes the balena steps.

License

View the license information for the software in the project. As with all Docker images, these likely also contain other software which may be under other licenses (such as Bash, etc from the base distribution, along with any direct or indirect dependencies of the primary software being contained). As for any pre-built image usage, it is the image user's responsibility to ensure that any use of this image complies with any relevant licenses for all software contained within.

N|Solid Hilscher Gesellschaft fuer Systemautomation mbH www.hilscher.com

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