Search found 54 matches

by esba1ley
Mon Feb 12, 2018 5:51 pm
Forum: Spirit Technical Discussion
Topic: Forward-thinking: Jessie or Stretch? Python 2 or Python 3?
Replies: 3
Views: 30

Re: Forward-thinking: Jessie or Stretch? Python 2 or Python 3?

I compiled OpenCV 3.4 against both Python2.7 and Python3.0 bindings simultaneously. That's even more future-proof... and just as easy to do.
by esba1ley
Mon Feb 12, 2018 2:02 am
Forum: Spirit Technical Discussion
Topic: Power use of LEDs - some observations
Replies: 2
Views: 15

Re: Power use of LEDs - some observations

Very astute observation. For power consumption purposes, capping the values of the NeoPixels to 127 is a really good idea. I'm not sure if it quite cuts power consumption in half... but it gets close. There may be some color shifting, though, because our eyes are more sensitive to some colors (green...
by esba1ley
Sun Feb 11, 2018 11:08 pm
Forum: Spirit Technical Discussion
Topic: Forward-thinking: Jessie or Stretch? Python 2 or Python 3?
Replies: 3
Views: 30

Forward-thinking: Jessie or Stretch? Python 2 or Python 3?

Kevin et. al.: The cards that came with our Spirit Rovers had Raspbian Jessie installed... The first thing I did was flash my card with Raspbian Stretch from 11-29-17 from "the mothership" at https://www.raspberrypi.org/downloads/raspbian/ . Similarly, as I"m going through your python...
by esba1ley
Sun Feb 11, 2018 11:01 pm
Forum: Spirit Technical Discussion
Topic: Simple way to monitor your Spirit Rover's syslog
Replies: 0
Views: 12

Simple way to monitor your Spirit Rover's syslog

HI all --

If you want to actively monitor your /var/log/syslog to look for problems (or any other log for that reason), use the following command from a terminal:

Code: Select all

tail -f /var/log/syslog
by esba1ley
Sun Feb 11, 2018 10:56 pm
Forum: Spirit Technical Discussion
Topic: A way to clone your Pi's SD card without removing it
Replies: 1
Views: 10

Re: A way to clone your Pi's SD card without removing it

This tool also allowed me to take an install that was on a 128GB cheap card (unreliable in the Pi) and downsize an already-working install to a 32GB higher-quality SanDisk card... so it has more utility than just backing things up.
by esba1ley
Sun Feb 11, 2018 10:54 pm
Forum: Spirit Technical Discussion
Topic: A way to clone your Pi's SD card without removing it
Replies: 1
Views: 10

A way to clone your Pi's SD card without removing it

Hey all, I just used a very useful tool today for cloning a Raspberry Pi, using the Pi to a USB SD card reader, so we don't have to remove our SD cards to back up our Spirit Rovers... The tool is here, and it's pretty well documented: https://github.com/billw2/rpi-clone Kevin: we should probably inc...
by esba1ley
Sun Feb 11, 2018 10:51 pm
Forum: Spirit Technical Discussion
Topic: Pi data to Arduino via SPI
Replies: 4
Views: 34

Re: Pi data to Arduino via SPI

FWIW, FPGAs do something similar -- they can literally reconfigure their *hardware* while running, if designed properly. Pretty cool stuff. This would open students' worlds into this concept.

-E
by esba1ley
Sun Feb 11, 2018 10:18 pm
Forum: Spirit Technical Discussion
Topic: Base sketch won't upload
Replies: 11
Views: 59

Re: Base sketch won't upload

That's really odd... I've programmed many AVR uCs, and avrdude usually works, provided that the fuses didn't get horked up somehow. (Then you HAVE to do an ISP connection, or worse, a dedicated chip programmer). Just so we can be sure we're not missing something that seems obvious to you, but isn't ...
by esba1ley
Sun Feb 11, 2018 9:07 pm
Forum: Spirit Technical Discussion
Topic: Base sketch won't upload
Replies: 11
Views: 59

Re: Base sketch won't upload

Bastian: See this thread: http://forum.plumgeek.com/viewtopic.php?f=18&t=7897 But the bottom line is I got it work with the Arduino IDE, with these settings in the pull-down menus: Board: "Arduino Pro or Pro Mini" Processor: "ATMega328 (3.3V, 8Hz)" Programmer: "ArduinoIS...
by esba1ley
Sun Feb 11, 2018 9:01 pm
Forum: Spirit Technical Discussion
Topic: Spirit Pi configuration: virtualenv -- necessary?
Replies: 4
Views: 25

Re: Spirit Pi configuration: virtualenv -- necessary?

To quote Bastian: Since it's not that easy to replace the micro-sd card of spirit... Already done it. Twice. Once to start from scratch with a Raspbian stretch version from RasPi (dated 11-29-17) instead of jessie, and another time to fix something dumb I did in the /boot/ partition. Tweezers are yo...