humboldt

# franga2000's .bashrc of awesomness

# Human-readable units
alias ll='ls -alh'
alias l='ls -CF'
alias du='du -h'
alias df='df -h'
alias free='free -h'

# Disaster prevention

humboldt

#Xiaomi Yi camera

##General info

• OS: Buildroot
• CPU: ARMv6-compatible processor rev 5 (v6l)
• BogoMIPS: 524.28
• Memory: 37MB

The root filesystem is rootfs, which is stored in memory and therefore wiped on reboot. The Micro SD card is mounted at /tmp/fuse_d/. Something is also mounted at /tmp/fuse_a and /tmp/fuse_z.

humboldt

Drift HD Ghost WiFi Application API

See my technical notes here, which include how to get root on a Drift HD Ghost with no modifications to the unit.

The following is a list of URLs which might be handy if you connect your machine to the Drift HD Ghost's WiFi network.

Live Video URL (works great in VLC)

rtsp://192.168.42.1/AmbaStreamTest

humboldt

# hugin project file
#hugin_ptoversion 2
p f2 w6912 h3456 v360  E13.7052 R0 n"TIFF_m c:NONE r:CROP"
m g1 i0 f0 m2 p0.00784314

# image lines
#-hugin  cropFactor=1
i w6912 h3456 f2 v396.635230442757 Ra0 Rb0 Rc0 Rd0 Re0 Eev13.70516 Er1 Eb1 r0.00825082164820041 p1.44530867102748 y-179.842406724096 TrX0 TrY0 TrZ0 Tpy0 Tpp0 j0 a0 b0 c0 d-1664.3727797412 e0 g0 t0 Va1 Vb0 Vc0 Vd0 Vx0 Vy0  S90,3367,92,3369 Vm5 n"image.jpg"
#-hugin  cropFactor=1
i w6912 h3456 f2 v388.424297290832 Ra0 Rb0 Rc0 Rd0 Re0 Eev13.70516 Er1 Eb1 r0.385796738657643 p-0.968200655049642 y-7.3874167823502 TrX0 TrY0 TrZ0 Tpy0 Tpp0 j0 a0 b0 c0 d1652.13282606849 e0 g0 t0 Va1 Vb0 Vc0 Vd0 Vx0 Vy0  S3555,6828,100,3373 Vm5 n"image.jpg"

humboldt

Xiaomi Yi JSON Protocol Reverse Engineering

First, connect to your camera via WiFi. Then you can send data to 192.168.42.1:7878

HELP IS APPRICIATED

Get token

Request:

{"msg_id":257,"token":0}

humboldt

#!/usr/bin/env python

import paho.mqtt.client as mqtt
import RPi.GPIO as GPIO

def on_connect(client, userdata, rc):
    #print ("Connected with rc: " + str(rc))
    client.subscribe("kwf/demo/led")

def on_message(client, userdata, msg):

humboldt

Friendly URLs

By default, Rails applications build URLs based on the primary key -- the id column from the database. Imagine we have a Person model and associated controller. We have a person record for Bob Martin that has id number 6. The URL for his show page would be:

/people/6

But, for aesthetic or SEO purposes, we want Bob's name in the URL. The last segment, the 6 here, is called the "slug". Let's look at a few ways to implement better slugs.

humboldt

#include <stdlib.h>
#include <unistd.h>
#include <stdio.h>
#include <string.h>
#include <fcntl.h>
#include <errno.h>

#include <linux/i2c-dev.h>

#define BYTES2SHORT(X) (X[0] << 8 | X[1])

humboldt

#include <stdlib.h>
#include <unistd.h>
#include <stdio.h>
#include <string.h>
#include <fcntl.h>
#include <errno.h>

#include <sys/ioctl.h>
#include <linux/i2c-dev.h>

humboldt

# autostart file in ~./.config/lxsession/LXDE-pi/
@lxpanel --profile LXDE-pi
@pcmanfm --desktop --profile LXDE-pi
#@xscreensaver -no-splash
#@point-rpi
@xset s off #no screensaver
@xset -dpms #no energy saving
@xset s noblank
@sed -i 's/"exited_cleanly":false/"exited_cleanly": true/' ~/.config/chromium/Default/Preferences
@chromium-browser --incognito --noerrdialogs --disable-translate --kiosk {{your-url-here}}