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Sub $50 10Hz GPS Receiver

 
Old 03-12-2015, 12:43 PM
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Originally Posted by aidandj View Post
Andddd group buy for those interested:

https://www.miataturbo.net/miata-par...1/#post1214229
Awww yissss!
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Old 03-12-2015, 01:06 PM
  #102  
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Originally Posted by aidandj View Post
Thingiverse link for those interested in the DIY:

Bluetooth GPS for Car by Bartimaeus - Thingiverse
much props sir. I picked up a racecapture so I don't need one at the moment but many people can benefit from this. Thanks for sharing!
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Old 04-03-2015, 04:27 AM
  #103  
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So i wired this thing all up, and racechrono and another external GPS app don't show anyhting. Racechrono starts at "Connecting to GPS", then bounces between "No Data from GPS", and "No fix to satellites".

The red LED on the GPS is flashing, when as I understand it means it has a fix.

Any suggestions?
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Old 04-03-2015, 11:51 AM
  #104  
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Originally Posted by Schuyler View Post
So i wired this thing all up, and racechrono and another external GPS app don't show anyhting. Racechrono starts at "Connecting to GPS", then bounces between "No Data from GPS", and "No fix to satellites".

The red LED on the GPS is flashing, when as I understand it means it has a fix.

Any suggestions?
Send me your wiring diagram/picture. Flashing red means you have a fix.

Also connect it to your computer and see what the output is. I had some issues with the one without a flash chip. Enough screwing with setting got it working though.
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Old 04-03-2015, 05:32 PM
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See, I drank beers and did this at 3am, and was quite confident it would work first try. So, it is a little compact to debug. Connecting to the computer via the gps only would likely prove somewhat difficult, as I planned on doing all the settings via Serial, without two-way communication. i.e. Serial only sends, as receive is going to Bluetooth. (also, don't hate on the soldering. harbor freight iron with a horrible tip :( My roommate moved to FL with his weller. I need to invest.)

Components:
Arduino Nano v3 (Arduino)
HC-06 Bluetooth module (Bluetooth)
REYAX RYN25GI u-blox MAX-7C GPS/QZSS (GPS) (The one without flash memory)

Arduino 5V -> GPS VDD
Arduino 3v3 -> Bluetooth VCC
Arduino 3v3 -> Bluetooth Wakeup
Arduino TX1 -> GPS RX
GPS TX -> Bluetooth RX
GPS Gnd -> Bluetooth Gnd -> Arduino GND
(I think that's everything)



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Old 04-03-2015, 05:37 PM
  #106  
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What's Bluetooth wakeup?
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Old 04-03-2015, 05:41 PM
  #107  
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My guesses were strictly based on what it sounds like, but i had no lights on the bluetooth module, nor could I find it with my phone, until I brought that pin HIGH.

Attached Thumbnails Sub  10Hz GPS Receiver-hc-05.jpg  
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Old 04-03-2015, 06:11 PM
  #108  
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In the past with the hc-05s I've used that pin sets it to master. But yours might be different can you connect to a terminal and see what's up? U-center should work.
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Old 04-03-2015, 06:12 PM
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Originally Posted by aidandj View Post
What's Bluetooth wakeup?
probably an energy saving function
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Old 04-04-2015, 09:39 AM
  #110  
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can't get mine on 10Hz :(
pinout as above

arduino sent to gps
"$PMTK220,100*2F"
"$PMTK314,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0*29 "
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Old 04-04-2015, 05:25 PM
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Originally Posted by aidandj View Post
In the past with the hc-05s I've used that pin sets it to master. But yours might be different can you connect to a terminal and see what's up? U-center should work.
I can, I just want to try and debug a little more before desoldering that whole thing.
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Old 04-04-2015, 05:30 PM
  #112  
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You should be able to connector to u-center over Bluetooth.
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Old 04-04-2015, 06:09 PM
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Removed the wakeup pin. Assuming all I had to do was select the right Com Port, this is all I get:

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Old 04-04-2015, 06:10 PM
  #114  
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What about just a serial terminal.
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Old 04-07-2015, 03:57 AM
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aidandj

are your GPS modules already at 10Hz
or you have to put them there yourself on
if so, how do you do that?
you also change the baud rate?
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Old 04-07-2015, 04:43 AM
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Old 04-07-2015, 08:37 AM
  #117  
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No they default to 1Hz. I use u-center to change the settings. Eventually I will try and see what commands u-center uses but right now I'm too busy actually making them.

Nope I leave baud at 9600.
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Old 04-07-2015, 08:39 AM
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thanks
batery will make the unit remeber the 10Hz setting?
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Old 04-07-2015, 08:41 AM
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Originally Posted by creon View Post
thanks
batery will make the unit remeber the 10Hz setting?
It didn't work on mine. That's why I switched to a chip with flash memory.
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Old 04-07-2015, 08:51 AM
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I read somewhere that the chip itself sees that he can not send as much data on 9600
and that he then switched back to 1Hz
Tonight another attempt
otherwise I have to figure out how I can put every time you start the setting to 10Hz using the Arduino
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