RPG Raspberry Pi Demo Code

This is the sample code that Scott Klement uses when presenting about using a Raspberry Pi together with RPG.

Requirements

• Raspberry Pi running Raspberry Pi OS (buster or newer)
• Node.js version 10 or newer (14 recommended) on the Raspberry Pi
• IBM i V7R2 or newer (V7R4 recommended)
• ILE RPG Compiler
• IBM HTTP Server (powered by Apache)

Installation on the Raspberry Pi

Download the code to a directory such as rpg-raspi-demo on the Raspberry Pi, and install dependencies by typing the following:

• git clone https://github.com/ScottKlement/rpg-raspi-demo.git
• cd rpg-raspi-demo
• npm install
• Update the URL in start.js so that it is appropriate for your enviroment

Running the Raspberry Pi server

• cd rpg-raspi-demo
• npm start

Setting up the IBM i code

All of the IBM i code is in the rpg subdirectory.

• Create an Apache server instance (using the IBM wizard)
• Edit the configuration file and replace with the code provided in the httpd.conf file.
• Change the library in the httpd.conf file to the one where to plan to install the RPG programs.
• Start the HTTP server.
• Upload the RPG and DDS code to the appropriate files. Typically this would be:
• raspid.dspf -> QDDSSRC,RASPID
• raspir.rpgle -> QRPGLESRC,RASPIR
• doorswitch.rpgle -> QRPGLESRC,DOORSWITCH
• Update the URL in RASPIR with the proper one for your environment
• See the DOORSWITCH and RASPIR sources for information on how to compile them.

Setting up the circuit

The code in this program is expecting the circuit to be built as follows: