Hacking the Amazon Dash for the UK

 Intro

So you want to use the Amazon Dash button but live in the UK?First issue, is actually getting them. They are only available in the US and you require a US address. Once you've actually obtained one of them, the next bit is pretty easy...

Configuration- android

Well you have to setup the dash button through the amazon.com app....

The easiest thing to do is to press and hold the dash until it flashes blue. Once it is in this mode, it creates a access point called 'Amazon ConfigureMe'. I used the excellent tool iStumbler to find this:

Once connected to it (192.168.0.2), I used firefox to http://192.168.0.1

There I entered the SSID and password of my local wireless LAN network and bam. It gave me the success sceen.

This, unfortunately, did not work, because the amazon app has a cert which automagically activates the dash, and in part of that process requires you to have a US IP address. So I fired up openvpn and connected to an endpoint in the US then did the setup via the amazon app.

Each time the dash connects to my wireless LAN, it sends a gratuitous arp and then shuts down. Note that the configuration mac address ( 6c:0b:84:34:ce:ed )is different to the actual mac address it uses once setup.

Programming

I am using my current favourite language python, and we're going to use the scapy library.

Firstly, we need to install the library:

sudo pip install scapy

Then run this script to find out what the mac address is:
from scapy.all import *

def arp_display(pkt):
  if pkt[ARP].op == 1: #who-has (request)
    if pkt[ARP].psrc == '0.0.0.0': # ARP Probe
      print "ARP Probe from: " + pkt[ARP].hwsrc

print sniff(prn=arp_display, filter="arp", store=0, count=10)
 

So now that I know this I can plug this into a proper python program, which sends me an email when my 9month old baby poos.

from scapy.all import *
import smtplib
server = smtplib.SMTP('192.168.2.254', 25)


def arp_display(pkt):
  if pkt[ARP].op == 1: #who-has (request)
    if pkt[ARP].psrc == '0.0.0.0': # ARP Probe
      if pkt[ARP].hwsrc == 'a0:02:dc:88:94:ea': # digestive disadvantage
        print "Pushed Poo"
    msg = "Scarlett pooed" # The /n separates the message from the headers
    server.sendmail("dash@amz.org", "phil.spencer@gmail.com", msg)   
  
      elif pkt[ARP].hwsrc == '10:ae:60:b1:97:73': # Depends
        print "Pushed Depends button"
      else:
        print "ARP Probe from unknown device: " + pkt[ARP].hwsrc

while True:
  print sniff(prn=arp_display, filter="arp", store=0, count=10)
 

Next part I will show how to log this data into an Excel sheet for later analysis.

Dual internet connections at home (primary/backup) with martians pt1

So I work a lot from home, approx 99% of the time, and soon my wife will be joining me in working from home, one day a week.

Preamble

One line is fibre from Virgin Media (150mb+), the other is an ADSL BOnline (7mb+), which uses the Tiscali network (AS9105).

I kept them separate, as the missus isn't technical so auto route failing issues, might not be diagnoseable for her, and it's easy for her to swap between primary and backup lines by just changing wifi SSIDs.

So one of the things that was provided by BOnline was a Technicolor TG582n router (not the best, but it'll do) - it is afterall a backup line to get internet access.
Current setup. The switches are HP Procurve managed switches with 4gb trunked, portchanneled connections between them both.

Internet1 ---> [eth2] Firewall1 (vlan1) +----- wifi1 (vlan1)
                                        |
                                        +----- switch1 (vlan 1,2)
                                               | | | |
Internet2 ---> Technicolor (vlan2)  ----+----- switch2 (vlan 1,2)
                                        |
                                        +----- wifi2 (vlan2)

Requirements

For traffic on the backup line to be able to access the internal LAN (192.168.2.0/24)
For traffic on the internal LAN, to be access anything on the backup line LAN (192.168.1.0/24)
For both lines, to be able to access the internet independently of each other.
To be able to VPN/SSH into to the firewall from either the primary line or backup line.

Steps

So one of the first things to do is get it connected to my main LAN.
Steps needed

* Add VLAN for backup line
* ensure DHCP scopes do not conflict
* Add static routing to the Technicolour.
* Add routing to the firewall

Setup

So I added a VLAN to the HP procurve switch (conneted to eth1), and untagged it to force all traffic to be backup VLAN, and excluded all others to eth1


Internet ---> [eth2] Firewall +----- [eth0] LAN 192.168.2.254/24
                              |
                              +----- [eth1] Backup 192.168.1.200/24
                              |
                              +----- [eth3] DMZ 10.40.0.0/24
                              |
                              |
    


I allocated eth1 to the new LAN, and assigned 192.168.1.200 to it (set it in /etc/network/interfaces). I needed to add a static route on the Technicolour so that everything on the backup line knew how to access everything on the main LAN (192.168.2.0/24). You can't do this via the web i/f as it doesn't have anything that advanced listed there.
The Technicolour has telnet access, so after seting myself and account and telnetting in I issued:

ip rtadd dst=192.168.2.0/25 gateway=192.168.1.200
ip saveall

Don't forget to saveall, otherwise it'll be running under the running-config, and next boot, it will not be applied.

Then I portforwarded a port from the Technicolour WAN for SSH access to my firewall [eth1/192.168.1.200].
Testing SSH access I tried sshing to my backup line and got this in the firewall logs (if you've enabled martian logging, your syslog will have entries similar to this):

Mar 18 15:56:31 aibo2 kernel: [586653.881530] IPv4: martian source 192.168.1.200 from 77.96.x.x, on dev eth1

This looked funny to me, as 77.96.x.x is my primary line (virgin media). My backup line was 79.78.x.x W00t was going on?

This is due to the fact that linux is not expecting a packet with that source address from that destination. i.e It's not expecting an internal address with that subnet to come from an external IP address. The external IP address is actually the interface belonging to Virgin Media, as that is my default route.

So we need to change the routing, so that all packets from the backup line are associated with the backup interface, and not get routed through my default route)

Routing 

Pre-req: iproute2 (this should be installed by default)

So we need linux to understand that packets from eth1, stay with eth1, and are not routed via the default eth2.

So edit /etc/iproute2/rt_tables

I added a table for beonline

#
# reserved values
#
255     local
254     main
253     default
0       unspec
#
# local
#
#1      inr.ruhep
1 beonline

Then added routing to tell that anything from 192.168.1.0/24 and eth1, store it in table beonline

Then that a default route for traffic destined for table beonline is the default gateway of beonline

Then add anything from table beonline has a src of 192.168.1.200

ip route add 192.168.1.0/24 dev eth1 192.168.1.200 table beonline
ip route add default via 192.168.1.254 table beonline
ip rule add from 192.168.1.200 table beonline

This works for me, with my routing table looking like so:

root@aibo2:/etc# ip route
default via 77.96.x.x dev eth2  metric 100
77.96.x.0/22 dev eth2  proto kernel  scope link  src 77.96.x.x
192.168.1.0/24 dev eth1  proto kernel  scope link  src 192.168.1.200
192.168.2.0/24 dev eth0  proto kernel  scope link  src 192.168.2.254

NAT/Masquerade

As an extra step, I added an iptables rule to masquerade all traffic from eth1 to the Technicolour router. I wasn't sure if this was necessary, but added it anyway (thinking about it, probably not since I added a static route on the technicolour)

To test this is all working, you can use ping or better, traceroute from your firewall:

via virgin media
root@aibo2:/etc# traceroute 8.8.8.8
traceroute to 8.8.8.8 (8.8.8.8), 30 hops max, 60 byte packets
 1  10.89.x.x (10.89.x.x)  6.719 ms  6.675 ms  6.640 ms
 2  croy-core-2a-ae6-648.network.virginmedia.net (81.96.228.201)  9.544 ms  9.576 ms  9.528 ms
 3  * * *
 4  * * *
 5  * * *
 6  72.14.198.97 (72.14.198.97)  18.411 ms  18.529 ms  18.611 ms
 7  72.14.233.247 (72.14.233.247)  23.630 ms 209.85.253.95 (209.85.253.95)  27.590 ms  27.279 ms
 8  209.85.245.187 (209.85.245.187)  32.126 ms 209.85.242.123 (209.85.242.123)  32.164 ms 209.85.142.177 (209.85.142.177)  32.024 ms
 9  google-public-dns-a.google.com (8.8.8.8)  31.025 ms  21.973 ms  11.934 ms

via beonline
root@aibo2:/etc# traceroute -s 192.168.1.200 8.8.8.8
traceroute to 8.8.8.8 (8.8.8.8), 30 hops max, 60 byte packets
 1  192.168.1.254 (192.168.1.254)  0.729 ms  0.946 ms  1.408 ms
 2  host-62-24-254-203.as13285.net (62.24.254.203)  27.596 ms  29.215 ms  28.727 ms
 3  host-78-151-228-57.as13285.net (78.151.228.57)  29.979 ms  31.896 ms  31.348 ms
 4  host-78-151-228-78.as13285.net (78.151.228.78)  33.601 ms host-78-151-228-72.as13285.net (78.151.228.72)  34.557 ms host-78-151-228-70.as13285.net (78.151.228.70)  34.967 ms
 5  host-78-144-11-223.as13285.net (78.144.11.223)  36.972 ms host-78-144-11-117.as13285.net (78.144.11.117)  37.424 ms host-78-144-9-81.as13285.net (78.144.9.81)  38.420 ms
 6  72.14.214.222 (72.14.214.222)  39.440 ms  25.707 ms  27.260 ms
 7  216.239.56.67 (216.239.56.67)  27.685 ms 216.239.56.203 (216.239.56.203)  26.193 ms 216.239.56.67 (216.239.56.67)  26.010 ms
 8  216.239.57.131 (216.239.57.131)  31.134 ms 216.239.57.153 (216.239.57.153)  29.699 ms 216.239.57.131 (216.239.57.131)  32.021 ms
 9  google-public-dns-a.google.com (8.8.8.8)  34.251 ms  32.332 ms  34.870 ms

Note that the traffic by default routes over my primary line (virgin media), so no source address needed. With beoline, I have to specify the source address, so that it knows to push the traffic via eth1 (backup line)

In part 2, I will be discussing how to route specific traffic over one connection or another.
e.g. You want FTP traffic going over your primary line, by skype traffic going over your backup line.

NodeMCU + DHT22 (ESP8266) wifi thermometer/humidity sensors pt2 with OLED

Wifi temperature / humidity sensor for under £20 with an OLED display

So I wanted a display output for the wifi temp modules, so I bought a few of these: http://www.ebay.co.uk/itm/111474769297?_trksid=p2057872.m2749.l2649&ssPageName=STRK%3AMEBIDX%3AIT

which are 128x64 displays with an i2c interface.It uses a multi-master protocol and has 2 x i2c lines which are SDA (serial data) and SCL (serial clock).

The reason for these, is that they use less power than a traditional LCD, have persistence when powering them, and are brighter than LCDs.

Code wise, I separated it into main code and a init loader (init being the first code loaded when the esp boots).
This basically 
Loader:

gpio.mode(1,gpio.OUTPUT)
gpio.write(1,gpio.HIGH)
wifi.setmode(wifi.STATION)
wifi.sta.config("wifi name","wifi passwd")
print (wifi.sta.getip())
gpio.write(1,gpio.LOW)
dofile("main.lua")

Main.lua

print("Running main")
gpio.mode(2,gpio.OUTPUT)
BLUE=1
gpio.mode(BLUE,gpio.OUTPUT)
gpio.write(BLUE,gpio.HIGH)
-- Set the LED to flash
pwm.stop(2)
pwm.setup(2,1,10)
pwm.start(2)
-- Load library

sda_pin = 5
scl_pin = 6
dht_pin = 4
oled_addr = 0x3c
-- Counter for heartbeat
cnt = 1
state = 0
-- global for display/read dht
humidtwo = 0
temptwo = 0
-- Heap limit
heap_limit= 22000

function init_OLED(sda,scl)
     sla = 0x3c
     i2c.setup(0, sda, scl, i2c.SLOW)
     disp = u8g.ssd1306_128x64_i2c(sla)
     disp:setFont(u8g.font_6x12)
     disp:setFontRefHeightExtendedText()
     disp:setDefaultForegroundColor()
     disp:setFontPosTop()
end
function read_sensor_values()
  local varh,vart
  dht22.read(dht_pin)
  varh = dht22.getHumidity()
  vart = dht22.getTemperature()
  if varh ~= nil then
    humidtwo = (varh/10).."."..(varh%10)
  else
    print ("Previous H : " ..humidtwo)
  end
  if vart ~= nil then
    temptwo = (vart/10).."."..(vart%10)
  else
    print ("Previous T : " ..temptwo)
  end
end

function display_sensor_values(vvar)
  disp:firstPage()
  disp:setFont(u8g.font_6x10)
  disp:setFontRefHeightExtendedText()
  disp:setDefaultForegroundColor()
  disp:setFontPosTop()
  local x,y,ip,nm,st,deg,result
  if state==1 then
    st=string.char(176)
  else
    st=" "
  end
  deg=string.char(176)
  repeat
    disp:drawRFrame(0, 0, 128-1, 64-1, 1)
    x=4
    y=8
    disp:drawStr(x, y, 'T:' .. (temptwo) .. deg ..'C   H:' .. (humidtwo) .. '%RH' )
    y = y+14
    disp:drawStr(x, y,  st .. ' H:' .. (node.heap()) .. ' C:' .. (cnt) )
    y = y+14
    if wifi.sta.status()==0 then result='STA_IDLE' end
    if wifi.sta.status()==1 then node.restart() end
    if wifi.sta.status()==2 then result='STA_WRONG PASSWD' end
    if wifi.sta.status()==3 then result='STA_NO AP FOUND' end
    if wifi.sta.status()==4 then result='STA_CONNECT FAILED' end
    if wifi.sta.status()==5 then result='STA_GOT_IP' end
    if vvar==1 then
      ssid,password,bssid_set,bssid=wifi.sta.getconfig()
      result= ssid
      ssid,password,bssid_set,bssid=nil,nil,nil,nil
    end
    disp:drawStr(x, y, result  )
    y = y+14
    ip,nm=wifi.sta.getip()
    if ip ~= nil then
        disp:drawStr(x, y, 'IP:' .. (ip)  )
    else
        disp:drawStr(x, y, 'IP: Cannot get IP')
        node.restart()
    end

  until disp:nextPage() == false

  cnt = cnt + 1
  if cnt > 999 then
     cnt=1
  end
end

init_OLED(5,6)

i2c.setup(0, sda_pin, scl_pin, i2c.SLOW)
disp = u8g.ssd1306_128x64_i2c(oled_addr)

  sv=net.createServer(net.TCP, 2)
  sv:listen(80,function(c)
      c:on("receive", function(c, pl)
         print(pl)
         if pl=="1" then
            print ("gpio1 low")
            gpio.write(1,gpio.LOW)
         end
         if pl=="2" then
            print ("gpio1 high")
            gpio.write(1,gpio.HIGH)
         end
      end)
        dht22 = require("dht22")
        gpio.mode(BLUE,gpio.OUTPUT)
        gpio.write(BLUE,gpio.HIGH)
        read_sensor_values()
        display_sensor_values()
        dht22=nil
        print("Humidity:    "..humidtwo.." %")
        print("Temperature: "..temptwo.." deg C")
        c:send("H:"..humidtwo.." ; T:"..temptwo.."\r\n")
        c:close()
        gpio.write(BLUE,gpio.LOW)
      
        hp=node.heap()
        if hp<5000 then
            node.restart()
        end
  
        collectgarbage()
       end)
     
tmr.alarm( 2, 1000, 1, function()
  if state == 0 then
    display_sensor_values(1)
  end
  if state == 1 then
    display_sensor_values(0)
  end
  state = (state + 1) %2
  collectgarbage()
end)

The code above requires dht22.lc to be loaded ( from here ), which should be compiled on the ESP2866, once uploaded as a LUA.

Doing a list should show something like this:

dht22.lc        : 1308 bytes
init.lua        : 199 bytes
main.lc         : 4176 bytes
main.lua        : 3521 bytes

The OLED display should be like so:

T: 25.3oC   H: 26.9%RH
* H:22824  C:288
STA_GOT_IP
IP: 10.10.0.164

So with this it will display the (T:) temperature in the top left, with the humidity level (H:) in the top right.
The next line shows a heartbeat icon, followed by heap size in bytes (H:).
I've programmed this so that if the heap space get below 5000 bytes, it will restart itself.
C: is the count, and when it reaches 999, it will go back to 1. This is purely to show it's doing some processing.
The next line alternates between the wifi status codes and the actual SSID it's connected to. This alternates every second.
The last line (IP:) shows the ip currently assigned to the device.

My output to RRD graph is something like this:

The drop outs are caused by the wifi signal (or lack of).
Part 1 here

Configuring exim4 for AWS/Amazon/SES

Exim4 and AWS SES

So if you want to use Amazon SES to send out emails, you'll need to verify your email address under Identity management -> Email addresses, which should send you an email to verify you own the recipient address.

Create SES credentials 

Under Email settings -> SMTP settings.

Don't forget them!

Configure Exim

 dpkg-reconfigure exim4-config

• mail sent by smarthost, received via SMTP or fetchmail
• your fully qualified domain name (e.g. example.com)
• 127.0.0.1   for listen address
• your fully qualified domain name (e.g. example.com) for final destination
• no relay servers
• your AWS SES smtp server as outgoing smarthost.  Importantly, don’t use the default port of 25, as 25 is unencrypted, and exim4 won’t send passwords over unencrypted connections without messing around.  So, for example, you might have “email-smtp.us-east-1.amazonaws.com::587”
• Accept defaults for everything else

Create a file /etc/exim4/passwd.client.  This will give exim4 the logon credentials.  Importantly, amazon will resolve to a different server name each time (via the load balancer), so you can’t just put your smtp server name in here.  Your format should be something like:

# password file used when the local exim is authenticating to a remote
# host as a client.
#
# see exim4_passwd_client(5) for more documentation
#
# Example:
### target.mail.server.example:login:password
*.amazonaws.com:<smtp_username>:<smtp_password>

Also check your aliases file in /etc/aliases

Do not buy your service from Vultr!

Poor Customer service from Vultr.

So I have  side business, which uses VPS around the globe, and one of the providers, I use is vultr.
Initially I thought they were great, but no just after a year of using them - they are unbelievably bad.

So one of the incidents was they emailed me to say they were rebooting one of my VPSs (last year around xmas time) - fine. Except they rebooted it 9 hrs ahead of schedule!! This was not good, as this particular server needed my to manually type in a password for a SSL cert for Apache to run.

Luckily, nagios and site 24x7 caught the reboot and emailed me. I asked for an explanation on why it was rebooted ahead of schedule, and nothing happened. No reply, no acknowledgement and no ticket was raised.

I raised a ticket to complain, and within an hour, someone had trashed my VPS.

I had to re-install, and then I find out that port 25 is blocked (telnetted to several providers e.g. yahoo, gmail)

2016-01-26 01:23:24 1aNsLs-00006F-1a alt1.gmail-smtp-in.l.google.com [2a00:1450:4010:c08::1a] Network is unreachable
2016-01-26 01:25:31 1aNsLs-00006F-1a alt1.gmail-smtp-in.l.google.com [64.233.165.27] Connection timed out
2016-01-26 01:25:31 1aNsLs-00006F-1a alt2.gmail-smtp-in.l.google.com [2404:6800:4003:c02::1b] Network is unreachable
2016-01-26 01:27:38 1aNsLs-00006F-1a alt2.gmail-smtp-in.l.google.com [74.125.68.27] Connection timed out
2016-01-26 01:27:38 1aNsLs-00006F-1a alt3.gmail-smtp-in.l.google.com [2404:6800:4008:c07::1a] Network is unreachable
2016-01-26 01:29:45 1aNsLs-00006F-1a alt4.gmail-smtp-in.l.google.com [173.194.72.27] Connection timed out

I emailed them and they said yup - we have port 25 blocked... Since FUCKING WHEN!? They didn't even inform me. The server that was trashed was a payments server which emailed new users their account data. If it didn't email the users, they would want refunds.

This was costing me sales.

I was not happy.

So they then replied to the support ticket about port 25 being blocked, with some crap about verifying my identity with a credit card and govt issued ID.
I replied: Why was I not informed when you blocked me? and why was this initially blocked?

I don't expect any reply from them or the ticket to be just closed without a response. I am FUMING!

My advice is, if you are running a business, don't use Vultr..... their customer support will lose you business!

NodeMCU + DHT22 (ESP8266) wifi thermometer/humidity sensors pt1

Wifi temperature / humidity sensor for under £20

Overview

So I travel a lot, and want to know what's happening in the house whilst I am abroad.
I've researched and there are many solutions out there (like here or here), but mostly they are way, way over priced at over £150 EACH per unit.

I need at least 5 units, for the bathroom, kitchen, boiler room etc. so even doing it with a raspberry pi would have been pricey at around £40-50 per 'sensor' (using the DHT22 for readings), so an outlay of about £250.

What I have found is something even better. The ESP8266. This is a self contained wifi module with built in TCP/IP stack for around £3 and under the size of a 50pence piece. Whoa - cheap eh? Ok, so the issue here is that it can't do a 5v-3v logic shift nor can I be bothered to figure out the electronics to step it down and connect it to USB TTL etc.

So.... I researched a bit more and there is a board that combines the ESP8266 and the step down and the USB TTL and allows me to either publish data via a message queue or host a webserver! This is the NodeMCU

Fantastic little thing that does everything you need it to + can be powered from a micro USB connection.

Parts list

ok so the parts list (you may not need to purchase everything, as you may have some parts already)
1 x NodeMCU (Amazon or ebay) - Beware of the version you get tho! Check the PCB colour and size.
1 x DHT22 temperature/humidity sensor (Amazon or ebay)
A breadboard /protoboard to prototype stuff (pimoroni) - you'll solder it onto this.
A solderless breadboard to test things work (pimoroni)
Soldering iron
Micro USB cable for connecting to a PC
some cheap micro usb charger
Wires for testing (Jumper jerky makes it easier)
Wires for permanent installation (pimoroni)

Total cost of the above is about £30 for the first unit. Cost of the 2nd unit will be about £13, 3rd unit about £13 too, so for 5 units, it's about £16 each. Not bad

Circuit diagram

 

Dev software

ESP software - for loading up LUAs and code

Putty

esp8266 flasher

Firmware

Download the firmware

https://github.com/nodemcu/nodemcu-firmware

Flashing firmware

config tab

select first slot

flash on tab one

ensure the MAC addresses show. If not, then something went wron.

A green tick at the end shows success.

Modules

DHT22 from here

Upload it with esplorer from above using the 'upload' button. Then compile by clicking reload on the middle right side, then a list of modules will appear. Right click and select compile.

Code

Set the wifi access point and set NIC to DHCP

print(wifi.sta.getip())
--nil
wifi.setmode(wifi.STATION)
wifi.sta.config("SSID","password")
print(wifi.sta.getip())
--192.168.18.110

View wifi SSIDs

function listap(t)

  for k,v in pairs(t) do 

    print(k.." : "..v) 

  end 

end 

wifi.sta.getap(listap)

onboard LED

Flash the blue LED near the USB connector

gpio.write(0,gpio.LOW)

gpio.write(0,gpio.HIGH)

GPIO LEDs

Flash an LED on GPIO pin 2

You can change the duty cycles by checking the docs http://www.nodemcu.com/docs/

 pwm.setup(2,1,10)
pwm.start(2)

Reading temperature/humidity

PIN=4
dht22 = require("dht22")
dht22.read(PIN)
t = dht22.getTemperature()
h = dht22.getHumidity()
humi=(h/10).."."..(h%10)
temp=(t/10).."."..(t%10)
print("Humidity:    "..humi.." %")
print("Temperature: "..temp.." deg C")
dht22 = nil
package.loaded["dht22"]=nil

 

All together:

print(wifi.sta.getip())
gpio.mode(2,gpio.OUTPUT)
--gpio.write(2,gpio.HIGH)
--gpio.write(2,gpio.LOW)
--gpio.write(1,gpio.LOW)
gpio.write(0,gpio.LOW)
BLUE=1 -- blue LED is on GPIO 1

pwm.stop(2)
pwm.stop(1)

pwm.setup(2,1,10)
pwm.start(2)

gpio.write(0,gpio.HIGH)


  sv=net.createServer(net.TCP, 2) 
  sv:listen(80,function(c)
      c:on("receive", function(c, pl)
         print(pl) 

      end)
        gpio.mode(BLUE,gpio.OUTPUT)
        gpio.write(BLUE,gpio.HIGH)
        PIN=4
        dht22 = require("dht22")
        dht22.read(PIN)
        t = dht22.getTemperature()
        h = dht22.getHumidity()
        humi=(h/10).."."..(h%10)
        temp=(t/10).."."..(t%10)
        print("Humidity:    "..humi.." %")
        print("Temperature: "..temp.." deg C")
        dht22 = nil
        package.loaded["dht22"]=nil
        c:send("H:"..humi.." ; T:"..temp.."\r\n")
        c:close()
        gpio.write(BLUE,gpio.LOW)
       end)

Note the above server doesn't respond to normal HTTP requests.  it responds with a simple:
H:xx ; T: xx
and disconnects after the initial connect.
You can use either curl or netcat to get the data.
It also flashes the blue LED whilst a network operation is in effect.
The white LED I've used blinks every second, to show it is working.

Dashboard

RRDtool - Create the RRD

This creates a RRD for 5 sensors, values 0 to 100 and 524160 data points (60*24*7*52) so 1 data point a minute

<?
    echo "Creates blank temp graphs";
    $options = array (
     "--step", "60",            // Use a step-size of 1 minute
     "--start", "-1 day",         "DS:hum1:GAUGE:100:0:100",
     "DS:hum2:GAUGE:100:0:100",
     "DS:hum3:GAUGE:100:0:100",
     "DS:hum4:GAUGE:100:0:100",
     "DS:hum5:GAUGE:100:0:100",
     "RRA:AVERAGE:0.3:1:524160",
    );


    $ret = rrd_create("./hum.rrd", $options);
    if (! $ret) {
     echo "<b>Creation error: </b>".rrd_error()."\n";
    }
?>

In part two, I'll show how to render the graphs

Part 2 here

Windows 10 search cannot find any applications

So since installing Windows 10, the search has been working fine.
Now today, When using search to find *any* application it doesn't find shit... seriously, it doesn't registere there are any applications.

Even though indexing is turned on for all the relevant places like c:\program files, c:\users, start menu it doesn't work.

The only thing that does work is a re-installation of Cortana

Firstly, open an elevated powershell prompt (see here if you don't know how) and run the following

Get-AppXPackage -Name Microsoft.Windows.Cortana | Foreach {Add-AppxPackage -DisableDevelopmentMode -Register "$($_.InstallLocation)\AppXManifest.xml"}

After that it instantly works.... very annoying or what?