Category Archives: c-rpi

Raspberry Pi Posts

SNMP Environmental Monitoring using ESP8266-based Sensors

(click here to see index of all ESP8266 posts) This is a somewhat large project, combining two ‘experiments’ I wanted to try: providing environmental monitoring with ESP8266-based sensors and using NET-SNMP’s extend facility to interface external data to SNMP. Long … Continue reading

Posted in c-esp8266, c-rpi | 8 Comments

Moving Raspberry PI B SD Card to to B+ MicroSD Card

Somehow, yet to be determined, I destroyed one of my RPI’s. I needed to buy a replacement for the old malfunctioning Raspberry Pi model B. The easiest thing to do would be to buy another model B and just move … Continue reading

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ESP8266 UDP to/from Raspberry Pi running Lazaraus / Free Pascal

(click here to see index of all ESP8266 posts) This is a variation on the theme of the prior post, except in this case, the ESP8266 sends a UDP packet to the RPI which processes it using Lazarus / Free … Continue reading

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ESP8266 UDP to/from Raspberry Pi running LUA

(click here to see index of all ESP8266 posts) This is just a different twist to my prior post ESP8266 Reading/Writing GPIO and Transmitting/Receiving UDP Packets In that post I send UDP packets to a Raspberry Pi running the echo … Continue reading

Posted in c-esp8266, c-rpi | Tagged | 2 Comments

Installing LUA on Raspberry Pi and Getting it Running

For the next part of my ESP8266 experiments, I’m going to need LUA running on my RPI, so I want to document the process. I first stumbled across LUA last fall when I was playing with CHDK – it is … Continue reading

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Reading Raspberry Pi GPIO Pins using Lazarus / Free Pascal

Way back when, I did a simple example of using Free Pascal to turn an LED on and off: Accessing Raspberry Pi GPIO using Lazarus/Free Pascal To date, that has been the most I’ve needed to do to the real … Continue reading

Posted in c-lazarus, c-rpi | Tagged | 3 Comments

Arduino, GPS, GSM/GPRS: Transmitting GPS Coordinates via UDP to Google Maps

This is a somewhat involved project. Using an Arduino, I read coordinates from a u-blox GPS, then use a GSM/GPRS cell radio to transmit those coordinates via UDP every 60 seconds to a Raspberry Pi running a LIGHTTPD web server. … Continue reading

Posted in c-arduino, c-rpi | Tagged | 2 Comments

Cutting and Pasting Text from Raspberry Pi using TightVNC

I run VNC on all of my machines to allow remote access from my ‘primary’ computer. Most of the time when I’m developing software, it is on a remote system in my basement. This tends to work well for me. … Continue reading

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Using the Echo Service on Raspberry Pi for Network Testing

If you’ve not seen the echo service before, it is a very simple Linux service that simply echos back whatever it is sent. Here I use telnet to connect to the service (port 7) and type ABC: Once I press … Continue reading

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lazwiringpi linker problem: Error Rasperry Uses VFP register arguments

The lazwiringpi wrapper has worked fine for me in the past, found here (you must be logged in to see the download). http://forum.lazarus.freepascal.org/index.php/topic,17404.0.html This wrapper allows you to accessing the Raspberry Pi wiringPi library which is written in C. Granted, … Continue reading

Posted in c-lazarus, c-rpi | Tagged | 8 Comments