Open moko GPS pin connection
Hi, Does any one know about the OpenMoko GPS chipset pin connection. After I opened it I could find only one grey wire which appears to be the antenna. Where are the Vcc,Gnd and Rx-Tx pins? Ranjan ___ Openmoko community mailing list community@lists.openmoko.org http://lists.openmoko.org/mailman/listinfo/community
Re: Open moko GPS pin connection
On Wed, 9 Nov 2011, RANJAN wrote: Hi, Does any one know about the OpenMoko GPS chipset pin connection. After I opened it I could find only one grey wire which appears to be the antenna. Where are the Vcc,Gnd and Rx-Tx pins? I guess you mean this part: http://wiki.openmoko.org/wiki/Disassembling_Neo1973#Removing_PCB_from_case_frame The grey cable is a 2-wire coaxial cable. I once ripped it off and tried to re-solder it without success. It is too tiny to handle it with fingers. The actual antenna is (from my understanding) the big light-brown piece of plastic in the top of the phone, while the GPS chip is soldered on the board itself. I think this is so because there is also a second external GPS antenna connector on the side of the phone. Also, plenty of shielding metal next to the GPS antenna connector lets me assume, that there is some high-frequencey electronics working under ;) I guess it works similair to a TV satelite receiver (LNB) which is also powered and data-exchanged with a 2-line coax cable. No idead how they do this technically. Roughly, there is power and some commands to justify the satelite receiver to a certain frequency. But IMHO the actual logic to interpret GPS data is not inside 'that brown plastic piece'. Alex. ___ Openmoko community mailing list community@lists.openmoko.org http://lists.openmoko.org/mailman/listinfo/community
Re: Open moko GPS pin connection
Hi Alex, The actual antenna is (from my understanding) the big light-brown piece of plastic in the top of the phone, while the GPS chip is soldered on the board itself. I think this is so because there is also a second external GPS antenna connector on the side of the phone.) Yeah figured that out eventually. In the future version they should make the GPS detachable and make the revision more modular like Clip on PCB boards for Accelerometer, GPS, Barometer,Gyro,SIM card module, etc.. It would make it more reconfigurable and open source/ DIY. Ranjan ___ Openmoko community mailing list community@lists.openmoko.org http://lists.openmoko.org/mailman/listinfo/community
Re: Open moko GPS pin connection
The setup in openmoko looks close to this one http://www.robotshop.com/seeedstudio-embedded-gps-antenna-for-gps-bee.html GPS chip and the embedded antenna separate. Ranjan On Wed, Nov 9, 2011 at 11:39 PM, RANJAN infi...@gmail.com wrote: Hi Alex, The actual antenna is (from my understanding) the big light-brown piece of plastic in the top of the phone, while the GPS chip is soldered on the board itself. I think this is so because there is also a second external GPS antenna connector on the side of the phone.) Yeah figured that out eventually. In the future version they should make the GPS detachable and make the revision more modular like Clip on PCB boards for Accelerometer, GPS, Barometer,Gyro,SIM card module, etc.. It would make it more reconfigurable and open source/ DIY. Ranjan ___ Openmoko community mailing list community@lists.openmoko.org http://lists.openmoko.org/mailman/listinfo/community
Re: Open moko GPS pin connection
Am 09.11.2011 um 19:03 schrieb Alexander Lehner: On Wed, 9 Nov 2011, RANJAN wrote: Hi, Does any one know about the OpenMoko GPS chipset pin connection. After I opened it I could find only one grey wire which appears to be the antenna. Where are the Vcc,Gnd and Rx-Tx pins? I guess you mean this part: http://wiki.openmoko.org/wiki/Disassembling_Neo1973#Removing_PCB_from_case_frame The grey cable is a 2-wire coaxial cable. I once ripped it off and tried to re-solder it without success. It is too tiny to handle it with fingers. Yes, they are very tiny. If someone is looking for a replacement, you can cut this 10cm into two halves: http://search.digikey.com/scripts/DkSearch/dksus.dll?KeyWords=hr5014-nd The actual antenna is (from my understanding) the big light-brown piece of plastic in the top of the phone, while the GPS chip is soldered on the board itself. I think this is so because there is also a second external GPS antenna connector on the side of the phone. Also, plenty of shielding metal next to the GPS antenna connector lets me assume, that there is some high-frequencey electronics working under ;) I guess it works similair to a TV satelite receiver (LNB) which is also powered and data-exchanged with a 2-line coax cable. No idead how they do this technically. Roughly, there is power and some commands to justify the satelite receiver to a certain frequency. But IMHO the actual logic to interpret GPS data is not inside 'that brown plastic piece'. The brown plastic piece is the ceramic antenna patch. Under the metal shield on the green PCB is just a single transistor amplifier. So it is a active antenna with pre-amplifier that is DC powered through the line and sends back the amplified 1500 MHz GPS signals. The real GPS receiver (with RX, TX etc.) and an antenna switch (internal/external antenna) is on the mainboard. You can find the schematics here: http://people.openmoko.org/joerg/schematics/GTA02/ Nikolaus ___ Openmoko community mailing list community@lists.openmoko.org http://lists.openmoko.org/mailman/listinfo/community
Re: [Gta04-owner] Clarification
On Tue, 2011-11-08 at 10:07 +0100, Dr. H. Nikolaus Schaller wrote:
does this mean that you won't be shipping the GTA04 boards until you are
able to mass produce the new cases ?
No, it means that they will be made available as a motherboard replacement for
existing GTA01 and GTA02 cases.
Ah! I didn't realise the GTA02 and GTA01 cases were compatible. Just
to be 100% sure about this, could you possibly answer explicitly: will
the GTA04 board fit in a Neo 1973 (GTA01) case, with the antenna,
display, speaker, battery, etc, all working?
Bob
--
Bob Ham r...@bash.sh
for (;;) { ++pancakes; }
signature.asc
Description: This is a digitally signed message part
___
Openmoko community mailing list
community@lists.openmoko.org
http://lists.openmoko.org/mailman/listinfo/community
Re: RTK-GPS with freerunner: decimeter-level accuracy with Free Software
Dear Timo,
This is what I wrote from you code:
1)Sets NMEA OFF and only UBX on
2)Enable-raw
3)raw-rate-monitor
*import struct
import calendar
import os
import gobject
import logging
import sys
import socket
import time
loop = gobject.MainLoop()
def callback(ty, packet):
print(callback %s % repr([ty, packet]))
# setting NMEA OFF AND ONLY UBX
if ty == CFG-PRT:
packet[1][In_proto_mask] = 1
packet[1][Out_proto_mask] = 1
t.send(CFG-PRT, 20, packet)
elif ty == ACK-ACK:
loop.quit()
return True
#raw rate monitor
def callback(ty, *args):
global prev_t
if ty == RXM-RAW:
t = time.time()
d = t - prev_t
print(%f %f % (d, 1.0/d))
prev_t = t
assert len(sys.argv) == 2
t = ubx.Parser(callback)
t.send(CFG-PRT, 0, [])
#enabling raw
t = ubx.Parser(callback)
t.send(UPD-DOWNL, 8 + 1, {StartAddr : 0x6c14, Flags : 0, B0 : 255})
loop.run()*
Please advice.
Ranjan
On Thu, Nov 1
0, 2011 at 12:25 AM, RANJAN infi...@gmail.com wrote:
GPSD? You can't use gpsd here. You can just read the raw data from
serial port using cat or netcat.
I do this to send NMEA data over serial by listening into the gps daemon.
import socket
import sys
import serial
host, port = 'localhost', 2947
sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
sock.connect((host, port))
sock.send('r')
file = open(gpstextlog.txt,w)
while True:
reply = sock.recv(16384)
file.write(reply)
What shall I do now? Shall I send the UBX data over serial without using
the GPS parser or should I send just RAW data after parsing it on the
phone? (My last mail tell you more about these doubts).
Ranjan
___
Openmoko community mailing list
community@lists.openmoko.org
http://lists.openmoko.org/mailman/listinfo/community
Re: RTK-GPS with freerunner: decimeter-level accuracy with Free Software
The raw-monitor screenshot:
http://imgur.com/Ork4o
On Thu, Nov 10, 2011 at 12:54 AM, RANJAN infi...@gmail.com wrote:
Dear Timo,
This is what I wrote from you code:
1)Sets NMEA OFF and only UBX on
2)Enable-raw
3)raw-rate-monitor
*import struct
import calendar
import os
import gobject
import logging
import sys
import socket
import time
loop = gobject.MainLoop()
def callback(ty, packet):
print(callback %s % repr([ty, packet]))
# setting NMEA OFF AND ONLY UBX
if ty == CFG-PRT:
packet[1][In_proto_mask] = 1
packet[1][Out_proto_mask] = 1
t.send(CFG-PRT, 20, packet)
elif ty == ACK-ACK:
loop.quit()
return True
#raw rate monitor
def callback(ty, *args):
global prev_t
if ty == RXM-RAW:
t = time.time()
d = t - prev_t
print(%f %f % (d, 1.0/d))
prev_t = t
assert len(sys.argv) == 2
t = ubx.Parser(callback)
t.send(CFG-PRT, 0, [])
#enabling raw
t = ubx.Parser(callback)
t.send(UPD-DOWNL, 8 + 1, {StartAddr : 0x6c14, Flags : 0, B0 : 255})
loop.run()*
Please advice.
Ranjan
On Thu, Nov 1
0, 2011 at 12:25 AM, RANJAN infi...@gmail.com wrote:
GPSD? You can't use gpsd here. You can just read the raw data from
serial port using cat or netcat.
I do this to send NMEA data over serial by listening into the gps daemon.
import socket
import sys
import serial
host, port = 'localhost', 2947
sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
sock.connect((host, port))
sock.send('r')
file = open(gpstextlog.txt,w)
while True:
reply = sock.recv(16384)
file.write(reply)
What shall I do now? Shall I send the UBX data over serial without using
the GPS parser or should I send just RAW data after parsing it on the
phone? (My last mail tell you more about these doubts).
Ranjan
___
Openmoko community mailing list
community@lists.openmoko.org
http://lists.openmoko.org/mailman/listinfo/community
The idea of making the MOKO tab
Hello All, Just got an Idea. I think we can make a Moko Tab (an open source tablet phone/PC) from the existing opensource hardware and the ones related to GSM,Wifi,bluetooth from OpenMoko FR. Take a look at the parts that you can find. http://imgur.com/NCkp9 References: Modular sensors for the Moko Tab http://www.sparkfun.com/products/10724 Tiny GPS with module and antenna http://www.sparkfun.com/products/10890 25$ Linux computer at the size of a USB Flash stick http://www.raspberrypi.org/ http://www.raspberrypi.org/wp-content/uploads/2011/07/pcb1.jpg The rest of the hardware can be taken from the previous moko. I think the idea of the first truly open source tablet PC should be realized. Sincerely Sriranjan ___ Openmoko community mailing list community@lists.openmoko.org http://lists.openmoko.org/mailman/listinfo/community
Re: The idea of making the MOKO tab
Excerpts from RANJAN's message of 2011-11-09 19:49:23 +: Hello All, Just got an Idea. I think we can make a Moko Tab (an open source tablet phone/PC) from the existing opensource hardware and the ones related to GSM,Wifi,bluetooth from OpenMoko FR. Take a look at the parts that you can find. http://imgur.com/NCkp9 References: Modular sensors for the Moko Tab http://www.sparkfun.com/products/10724 Tiny GPS with module and antenna http://www.sparkfun.com/products/10890 25$ Linux computer at the size of a USB Flash stick http://www.raspberrypi.org/ http://www.raspberrypi.org/wp-content/uploads/2011/07/pcb1.jpg The rest of the hardware can be taken from the previous moko. I think the idea of the first truly open source tablet PC should be realized. Sincerely Sriranjan Hi, Someone have just showed me yesterday this one: http://wetab.mobi/en/ It says 'Open Software, Open Hardware' but don't seam to me like open source hardware... Still it runs version of MeeGo as you can see on this video http://www.youtube.com/watch?v=pOBUdiPZ1hA Cheers! ~ elf Pavlik ~ ___ Openmoko community mailing list community@lists.openmoko.org http://lists.openmoko.org/mailman/listinfo/community
Re: The idea of making the MOKO tab
On Wed, 9 Nov 2011, elf Pavlik wrote: Someone have just showed me yesterday this one: http://wetab.mobi/en/ It says 'Open Software, Open Hardware' but don't seam to me like open source hardware... Still it runs version of MeeGo as you can see on this video http://www.youtube.com/watch?v=pOBUdiPZ1hA Ha, I applied to this company a few years ago, when the product was still in the pre-alpha phase. I guess it was shortly after the Neo came out and I was interested in opensource development. I didn't take the job for other personal reasons. But there already the whole sofware and hardware stack seemed not open at all. So if you take all disadvantages of the NEO and the iPad, you will get this 'weTab'. (Sorry weTab-guys for the hard criticism). Similair to FIC/OpenMoko, their business plan seems not to work out. And I guess there is no community around the weTab at all. Maybe also have a look at the new 1-Laptop-per-Child XO/3 tablet (german news site): http://www.heise.de/newsticker/meldung/OLPC-Gruender-will-Tablets-mit-dem-Hubschrauber-verteilen-1374592.html (Hardware is still a mock-up, of course...) I still prefer the 'wooden-case' version after all these discussions ;) A. ___ Openmoko community mailing list community@lists.openmoko.org http://lists.openmoko.org/mailman/listinfo/community
Re: The idea of making the MOKO tab
Le 09/11/2011 21:32, Alexander Lehner a écrit : On Wed, 9 Nov 2011, elf Pavlik wrote: Someone have just showed me yesterday this one: http://wetab.mobi/en/ It says 'Open Software, Open Hardware' but don't seam to me like open source hardware... Still it runs version of MeeGo as you can see on this video http://www.youtube.com/watch?v=pOBUdiPZ1hA Ha, I applied to this company a few years ago, when the product was still in the pre-alpha phase. I guess it was shortly after the Neo came out and I was interested in opensource development. I didn't take the job for other personal reasons. But there already the whole sofware and hardware stack seemed not open at all. So if you take all disadvantages of the NEO and the iPad, you will get this 'weTab'. (Sorry weTab-guys for the hard criticism). Similair to FIC/OpenMoko, their business plan seems not to work out. And I guess there is no community around the weTab at all. Maybe also have a look at the new 1-Laptop-per-Child XO/3 tablet (german news site): http://www.heise.de/newsticker/meldung/OLPC-Gruender-will-Tablets-mit-dem-Hubschrauber-verteilen-1374592.html (Hardware is still a mock-up, of course...) I still prefer the 'wooden-case' version after all these discussions ;) A. Hi all, The idea is great, and (I thiunk) not so much hard to do. The project could be based on the GTA04 hardware, (because it can be used with a larger screen, with higher resloution), thoug the GTA02 won't ba able to. So it is only a problem of finding a new touchscreen, and a case (as usual ,-) ). It could be a good idea to ask to Dr Nocholaus Scheller for the screen. Thomas ___ Openmoko community mailing list community@lists.openmoko.org http://lists.openmoko.org/mailman/listinfo/community
