On Fri, 22 Jul 2016 14:19:20 +0000, Mark Morgan Lloyd <markmll.fpc-pas...@telemetry.co.uk> wrote:
>Or go the whole hog and >port the program onto a Raspberry Pi: Bo's doing something like you're >asking. Yes, indeed! I now have something like 7-8 operational RPi units for different purposes and in several places I have used the GPIO pins to control and read back digital stuff from FPC programs. Very convenient. Last I did was to attach a 4-way relay board to a RPi and put a smapp FPC command line program on it, which gets called from a PHP script on the Apache webserver on the Pi. Now I have a webpage, with which I can switch on/off the relays with in order to control the operational state of some measuring equipment sitting half way across the workd! You could do a LOT with FPC and a Raspberry Pi! Examples: The Pi also runs an OpenVPN server so I can access it with PuTTY and/or TightVNC to program it if I need to. My Pi also has a port mapping utility which makes it possible for me to remotely access a WiFi network device on a WiFi access point close to the RPi again from a long distance away. THis was created with FPC and Indy10 on the RPi. >Any of those have the advantage that the electronics can be positioned >to minimise the signal run carrying TTL. Long printer cables are >generally bad news. 15 cm wires to the relay board... -- Bo Berglund Developer in Sweden _______________________________________________ fpc-pascal maillist - fpc-pascal@lists.freepascal.org http://lists.freepascal.org/cgi-bin/mailman/listinfo/fpc-pascal