scrying

Note: This HOWTO does not [yet] cover use of the Scheme interpreter - only the logging application in SVN (serialtest.c) and mini_skry

Using spacers [M3 12mm] and nuts/bolts if required.

eg.

[with RSSI module based on the AD8313: see module_rssi ]

[with CYWM6935 for spectrum analysis around 2.4 GHz: see module_spectrum ]

Now [2009] replaced with a custom module based on the Cypress CYWUSB6935 IC.

Attach battery with red wire (+) at top of two pin connection and black wire (-/GND) at bottom.

USB is used for charging battery pack, as well as for terminal connection.

[ GNU screen can also be used as follows: screen /dev/ttyUSB0 9600 with C-a H to log]

Settings as follows: 9600 baud, /dev/ttyUSB0 (depending on other devices may be /dev/ttyUSB1), no hardware or software flow control, 8N1 [sets parity and stop bits].

Should see prompt as follows:

And issue help command. Commands as follows:

log: outputs log so far as stream of number/chars

lv: print one sample for debugging

nm: show log counter

res: reset counter to 0

p: pause logging

s: (re-)start logging

d1/d2/d3: delays short→long between logging

str: streams log data

q: quit streaming data

8bit: char output

10: 10 bit integer output

ant: antenna source (bare antenna into ADC)

rssi: rssi board as source

gps: toggle (on/off) and init GPS

gpl: toggle live GPS messages for debugging

gplog: print GPS log so far

help: helps

Use minicom logging functions to output to files for further analysis and graphing.

Trimble Lassen SQ outputting NMEA GGA phrase every second. Remember to attach active antenna to MCX connector. It also may take up to fifteen minutes in plain sky view to get a satellite fix from a cold start.

Note that the output from gplog shows long and lat followed by the EM log figure (if delay is slow there will be little change). A bug was fixed [6/8/08] which logged all GPS data twice [now in svn].

In CVS GNU Emacs 23:

1] M-x serial-term (eg. /dev/ttyUSB0, 9600 b/s)

2] and then C-c is escape eg>

C-c C-b to switch buffers

C-c C-k char mode

C-c C-j line mode [with history accessed by way of M-p previous and M-n next]

providing adequate console for scrying serial connection [/dev/ttyUSB0].

[Note: for some reason above works inconsistently!]

3] To upload a region of code to the serial device:

  (defun serial-send-region ()
    (interactive)
  (let ((tmper (buffer-substring (region-beginning) (region-end))))
    (switch-to-buffer (find-file-noselect "/tmp/scrying.transfer"))
    (erase-buffer)
    (insert tmper)
    (save-buffer "/tmp/scrying.transfer")
    (start-process "scrying-upload" nil "/root/scrying/scrying/scrying.sh")))

acii-xfer command is wrapped in scrying.sh:

  #!/bin/sh
 
  /usr/bin/ascii-xfr -sen -l 10 -c 10 /tmp/scrying.transfer > /dev/ttyUSB0

1] install gnuplot-mode for GNU Emacs: http://cars9.uchicago.edu/~ravel/software/gnuplot-mode.html

2] M-x gnuplot-mode

2.5] make sure logged data is clean and uses tabs and not commas

3] Example code: use C-c C-r to send region to gnuplot:

set parametric
unset key
set style data line
set surface
set contour both
set cntrparam bspline
set dgrid3d 30,30,10
splot "/root/2310test.log"
 
# flat heat map
 
unset surface
unset contour
set view map
set pm3d at b
set dgrid3d 30,30,10
splot "/root/2310test.log" using 1:2:3
 
help splot
 
# for line style plot (a la plot3)
 
unset view map
set ticslevel 0
set surface
unset contour
unset pm3d
unset dgrid3d
splot "/root/gijon/1903.log" using 1:2:3 with lines
 
# animation and overlays??

1] Install R: apt-get install r-base-dev r-recommended

2] Install ESS for GNU Emacs: http://ess.r-project.org/

3] Install needed packages such as akima:

R CMD INSTALL /path/to/package.tar.gz

4] M-x R

5] Example code evaluated with M-x ess-eval-region (or C-c C-r):

#simplest

require(akima)

require(lattice)

mtab<-read.table("/root/2310test.log")
par(bg = "slategray")
persp(interp(mtab[,1],mtab[,2],mtab[,3],duplicate="strip"), theta = 110, phi = 100, col = "green3", ltheta = -120, shade = 0.8, border = NA)

# cloud (lines) and wireframe

mtab<-read.table("/root/2310test.log")
temp <-data.frame(mtab[,1],mtab[,2],mtab[,3])
reggrid <-interp(mtab[,1],mtab[,2],mtab[,3],duplicate="strip")
cloud(mtab[,3]~mtab[,2]*mtab[,1],type="l")
wireframe(reggrid$z,scales=list(arrows=FALSE),drape=TRUE,colorkey=TRUE)

help(persp)

Code is divided into core library, logging application and Scheme interpreter

https://sourceforge.net/projects/scrying

Fuse bits for all options (4 MHz external): lfuse: 0xFD hfuse: 0×99 efuse:w:0xFF

Eg:

avrdude -c stk500v2 -p m128 -P /dev/ttyUSB0 -U lfuse:w:0xFD:m -U hfuse:w:0x99:m -U efuse:w:0xFF:m -U flash:w:serialtest.hex

See also: http://1010.co.uk/avrprog.html

1] See: http://1010.co.uk/scrying_tech_notes.html for loose notes.

2] Latest hardware designs/schematics at: https://code.goto10.org/svn/xxxxx/trunk/scrying_hardware/

With main schematic as: https://code.goto10.org/svn/xxxxx/trunk/scrying_hardware/scrymain_newmemory.sch

and BOM (Bill of Materials) as: https://code.goto10.org/svn/xxxxx/trunk/scrying_hardware/scrymain_newmemory.lst

and all Kicad/Gerber files as: https://code.goto10.org/svn/xxxxx/trunk/scrying_hardware/larger_panel002.zip

Pinouts of main pass-through connector for modules:

Pins:

1: 3.3v      2: PF0/ADC0
3: GND       4: PF1/ADC1
5: 5v        6: PF2/ADC2
7: PE1/TX    8: PF3/ADC3
9: PE0/RX    10: PF4/ADC4
11: PB0/SS   12: PF5/ADC5
13: PB1/SCK  14: PF6/ADC6/ANTENNA
15: PB2/MOSI 16: PF7/ADC7
17: PB3/MISO 18: PD0/INT0
19: PD5      20: PD1/INT1
21: PD6      22: PD2/RXD1
23: PD7      24: PD3/TXD1
25: BATTERY  26: PD4

And for serial connector (6 pin with pin 1 as bottom right):

1] GND 2] +V 5] RXD 6] TXD (top left)

Received Strength Signal Indicator see wikipedia: http://en.wikipedia.org/wiki/RSSI

See also details for the AD8313 chip used on the RSSI board: http://www.analog.com/library/analogDialogue/archives/33-03/ask28/

The gps module has a MCX connector, (i wonder if one of this are compatible with it, http://www.u-blox.com/products/ann.html ,its what i got)

A: It should be active - if the ublox antenna is this one: ANN-MS-2-005-0 (MCX) then it will be fine. Otherwise you will need an MCX adapter.

Q/So, What type of connector i need for this gps module (see picure above):

A/

Q/Since berlin i got used to the portability of a device that will allow me to listen in realtime the state of the em spectrum.. what do i need, what am i missing?

A/Ok. Two possible approaches - one is that as the RSSI/AD8313 is really the only board that could provide an audio signal that you could solder on a minijack plug to the 26 pin connector (I need to check pins). Another would be to code some kind of audio translation onto the microcontroller and make a new board for audio out using PWM - this could be good.

KDaG

Independent module for long-term logging to microSD card (around 1 month on 2x AA batteries) to be deployed en masse (16x) in Berlin in the next month.

Logging wide spectrum RF and tight 2.4GHz wireless spectrum).

Based on ATmega168, Analog Devices AD8313, and Cypress CYWUSB6935.

Design: https://code.goto10.org/svn/xxxxx/trunk/scrying_hardware/

Code: https://code.goto10.org/svn/xxxxx/trunk/mini_skry/

avrdude -c usbasp -p m168 -U lfuse:w:0xE2:m -U hfuse:w:0xDF:m -U flash:w:sd-reader.hex 

Currently logs AD8313 and channel 11 2.4 GHz wireless to microSD. No configuration/running.

Notes at: http://1010.co.uk/org/notes.html

1] GND

2] +3.3v

3] RXD

4] TXD

5] ADC4

6] ADC3

7] ADC2

8] ADC1