GPS Toy / On board computer
This is something I’ve been working about a month now. It’s a little handheld GPS / on board computer that shows altitude, current course, synced satellites, speed, time and date, distance between saved point and current point (and its course and corrdinates) and total trip distance.
Cube GPS Toy
At first I wanted a speed-o-meter for my bike but you know, coding it’s free and could stop adding functions.
I managed to get some cheap serial GPS receptor, a tiny OLED display and an Arduino Mini Pro and started to code. First I knew I would need some big font and so I made my own using paint, each character 24×32 (96bytes). This is the complete parts list:
- Ebay I2C SSD1306 based OLED display, 128×64, 0.96″ and 5V.
- Ebay Arduino Mini Pro (ATMEGA328p), 5V 16Mhz
- Sparkfun DC-DC step-up voltage converter (5V).
- Adafruit MPC73833 LiPo battery charger.
- Savaged iPod Nano 1st gen battery.
- Dealextreme EM-411 GPS 5V receiver.
- Savaged momentary buttons, resistors and wires.
I had to code some method to print own big fonts in the display and the moment I managed to control all the display functions as I wanted I started to code the methods to print GPS gathered data in the display. This is an earlier slowed display test that didn’t worked well:
The first prototype had just speed mode, was assembled with double tape and had no battery charger. It’s purpose was to see how speed meter worked testing it in my car.
First handheld GPS prototype
Then I dismantled firts prototype and assembled second prototype, this time no double tape, just boards soldered togheter. This is the schematic:
Tiny GPS schematic
And so I began building:
OLED Display up, GPS Conector (glued to DC-DC) down.
Second prototype assembling. Arduino Up, DC-DC down.
The actual prototype looks like a tiny packed devices cube with front display and momentary switches (best view on 720p). Here is a video with functions explanation:
I’m not a coder so code is pretty much ugly. Sketch it’s downloable from here. It uses TinyGPS library from Mikal Hart, custom new software serial to disable interrupts in pin ports and PinChangeInt, an Arduino library to handle buttons interrupts.
If you would like to contribute with functions or code fixes please feel free to contact me either in the comments or in my email address (at the bottom of the page).
Miércoles, Junio 6th 2012 at 3:01 pm
[...] for his bike. Feature creep makes fools of us all, so after a month of work [Karman] had a GPS-enabled cube that tells him his current latitude and longitude, current time, course, direction and [...]
Miércoles, Junio 6th 2012 at 3:29 pm
[...] for his bike. Feature creep makes fools of us all, so after a month of work [Karman] had aGPS-enabled cube that tells him his current latitude and longitude, current time, course, direction and [...]
Miércoles, Junio 6th 2012 at 6:28 pm
where can i find the OLED display for delivery to the uk?
Miércoles, Junio 6th 2012 at 7:38 pm
Great build! What’s the battery life like for this device?
Miércoles, Junio 6th 2012 at 9:02 pm
@ Brendan: this is the one I bought: http://www.ebay.es/itm/I2C-0-96-OLED-display-module-compatible-Arduino-/130566448551?pt=LH_DefaultDomain_0&hash=item1e665de5a7
Photo is old, but screen module is newer and blue instead red.
@Kyle: 1 hour 45 min. Battery is really old, but used that one because it’s perfect fitting size.
Miércoles, Junio 6th 2012 at 9:42 pm
Nice work! Great workmanship, love the schematic, very nicely laid out.
Miércoles, Junio 6th 2012 at 9:48 pm
what are the pin names/numbers that connect the arduino and the oled display? I can’t tell exactly from the schematic
Miércoles, Junio 6th 2012 at 10:29 pm
@Luke: Thanks! The schematic was made using paint and pasted photos.
@Ethan: Analogs 4 and 5, the usual ones for I2C bus. You can check it at the arduino mini pro layout.
Jueves, Junio 7th 2012 at 7:43 am
[...] for his bike. Feature creep makes fools of us all, so after a month of work [Karman] had a GPS-enabled cube that tells him his current latitude and longitude, current time, course, direction and [...]
Jueves, Junio 7th 2012 at 8:08 am
[...] szczegółów znajdziecie tutaj : LINK Powiązane wpisy:MicroFly – projekt Quadrocopter`aElektroniczny klucz CW w 5 [...]
Viernes, Junio 8th 2012 at 1:51 am
Excellent project. It’s beautifully done to get it into a nice tight cube. You should have a custom pcb made so it can be even smaller.
Sábado, Junio 9th 2012 at 3:06 pm
is it possible to switch the mini for a nano ?
Sábado, Junio 9th 2012 at 3:24 pm
Nice build.
There was something I was wondering. It’s usually recommended to have the GPS pointed up, towards the sky. Have you run into any performance issues because the GPS is pointed down?
Sábado, Junio 9th 2012 at 8:55 pm
@Tibo: works exactly but is bigger.
@Mr. Cruz: maybe in first fix but not usually.
Martes, Junio 12th 2012 at 6:13 am
[...] toe. Vergeet ook niet het OLED-display van 128×64 en een ATMEGA 328p microcontroller. Om alle specifieke onderdelen bij elkaar te vinden, zul je een beroep moeten doen op je [...]
Viernes, Junio 22nd 2012 at 12:21 pm
I just got in the display from ebay and tried to compile the code using Arduino 1.0.1 but get these errors. Can you help? I’m using the Mini Pro..
GPS_Toy:12: error: variable or field ‘updateScreen’ declared void
GPS_Toy:12: error: ‘TinyGPS’ was not declared in this scope
GPS_Toy:12: error: ‘gps’ was not declared in this scope
GPS_Toy:13: error: variable or field ’saveActualLoc’ declared void
GPS_Toy:13: error: ‘TinyGPS’ was not declared in this scope
GPS_Toy:13: error: ‘gps’ was not declared in this scope
GPS_Toy:15: error: variable or field ‘udpateTrip’ declared void
GPS_Toy:15: error: ‘TinyGPS’ was not declared in this scope
GPS_Toy:15: error: ‘gps’ was not declared in this scope
GPS_Toy:16: error: variable or field ‘printCourse’ declared void
GPS_Toy:16: error: ‘TinyGPS’ was not declared in this scope
GPS_Toy:16: error: ‘gps’ was not declared in this scope
GPS_Toy:17: error: variable or field ’sendDistanceBetwen’ declared void
GPS_Toy:17: error: ‘TinyGPS’ was not declared in this scope
GPS_Toy:17: error: ‘gps’ was not declared in this scope
GPS_Toy:23: error: variable or field ‘print_date’ declared void
GPS_Toy:23: error: ‘TinyGPS’ was not declared in this scope
GPS_Toy:23: error: ‘gps’ was not declared in this scope
GPS_Toy:41: error: ‘TinyGPS’ does not name a type
GPS_Toy.cpp: In function ‘void setup()’:
GPS_Toy:111: error: ‘PCintPort’ has not been declared
GPS_Toy:112: error: ‘PCintPort’ has not been declared
GPS_Toy.cpp: In function ‘void loop()’:
GPS_Toy:212: error: ‘gps’ was not declared in this scope
GPS_Toy:212: error: ’saveActualLoc’ was not declared in this scope
GPS_Toy:243: error: ‘gps’ was not declared in this scope
GPS_Toy:330: error: ‘gps’ was not declared in this scope
GPS_Toy:330: error: ‘updateScreen’ was not declared in this scope
GPS_Toy:333: error: ‘gps’ was not declared in this scope
GPS_Toy:333: error: ‘udpateTrip’ was not declared in this scope
GPS_Toy.cpp: In function ‘void interrupt_button()’:
GPS_Toy:339: error: ‘PCintPort’ has not been declared
GPS_Toy:341: error: ‘PCintPort’ has not been declared
GPS_Toy.cpp: In function ‘void reset_display()’:
GPS_Toy:376: error: ‘gps’ was not declared in this scope
GPS_Toy:376: error: ‘updateScreen’ was not declared in this scope
GPS_Toy.cpp: At global scope:
GPS_Toy:382: error: variable or field ‘updateScreen’ declared void
GPS_Toy:382: error: ‘TinyGPS’ was not declared in this scope
GPS_Toy:382: error: ‘gps’ was not declared in this scope
Viernes, Junio 22nd 2012 at 6:43 pm
I have no clue about ‘declared void’. In the other hand the gps errors comes from not having the TinyGPS library.
Lunes, Junio 25th 2012 at 9:04 pm
can you please send me a copy of the code? i’m unable to open the file from the link you provide me……..gracias
me podrias enviar una copia del code? no puedo abrir el file que tienes para hacerlo bajar de la internet….gracias
Martes, Junio 26th 2012 at 8:58 am
Please use Winrar, it should open tgz files.
Miércoles, Julio 4th 2012 at 9:08 am
Hey guys,
thanks a lot for the project idea. I build the same thing with a other SSD1306 display (http://bit.ly/LwP6Jq).
With the display you can use the libraries of adafruit (http://bit.ly/N84qhZ) and don’t need any self construction ;)
I will post on my blog (zauberstuhl.de) in the next days more information and the code :)
Thanks and hf,
Lukas
Miércoles, Julio 4th 2012 at 11:07 pm
Nice work!
But I get these errors, what I do wrong?
TinyGPS\TinyGPS.cpp.o: In function `TinyGPS’:
C:\Documents and Settings\Gebruiker\Mijn documenten\Arduino\libraries\TinyGPS/TinyGPS.cpp:28: multiple definition of `TinyGPS::TinyGPS()’
TinyGPS.cpp.o:C:\DOCUME~1\GEBRUI~1\LOCALS~1\Temp\build5425500241782305192.tmp/TinyGPS.cpp:28: first defined here
TinyGPS\TinyGPS.cpp.o: In function `TinyGPS’:
C:\Documents and Settings\Gebruiker\Mijn documenten\Arduino\libraries\TinyGPS/TinyGPS.cpp:28: multiple definition of `TinyGPS::TinyGPS()’
TinyGPS.cpp.o:C:\DOCUME~1\GEBRUI~1\LOCALS~1\Temp\build5425500241782305192.tmp/TinyGPS.cpp:28: first defined here
TinyGPS\TinyGPS.cpp.o: In function `TinyGPS::stats(unsigned long*, unsigned short*, unsigned short*)’:
C:\Documents and Settings\Gebruiker\Mijn documenten\Arduino\libraries\TinyGPS/TinyGPS.cpp:102: multiple definition of `TinyGPS::stats(unsigned long*, unsigned short*, unsigned short*)’
TinyGPS.cpp.o:C:\DOCUME~1\GEBRUI~1\LOCALS~1\Temp\build5425500241782305192.tmp/TinyGPS.cpp:102: first defined here
TinyGPS\TinyGPS.cpp.o: In function `TinyGPS::from_hex(char)’:
C:\Documents and Settings\Gebruiker\Mijn documenten\Arduino\libraries\TinyGPS/TinyGPS.cpp:113: multiple definition of `TinyGPS::from_hex(char)’
TinyGPS.cpp.o:C:\DOCUME~1\GEBRUI~1\LOCALS~1\Temp\build5425500241782305192.tmp/TinyGPS.cpp:113: first defined here
TinyGPS\TinyGPS.cpp.o: In function `TinyGPS::parse_decimal()’:
C:\Documents and Settings\Gebruiker\Mijn documenten\Arduino\libraries\TinyGPS/TinyGPS.cpp:123: multiple definition of `TinyGPS::parse_decimal()’
TinyGPS.cpp.o:C:\DOCUME~1\GEBRUI~1\LOCALS~1\Temp\build5425500241782305192.tmp/TinyGPS.cpp:123: first defined here
TinyGPS\TinyGPS.cpp.o: In function `TinyGPS::parse_degrees()’:
C:\Documents and Settings\Gebruiker\Mijn documenten\Arduino\libraries\TinyGPS/TinyGPS.cpp:142: multiple definition of `TinyGPS::parse_degrees()’
TinyGPS.cpp.o:C:\DOCUME~1\GEBRUI~1\LOCALS~1\Temp\build5425500241782305192.tmp/TinyGPS.cpp:142: first defined here
TinyGPS\TinyGPS.cpp.o: In function `TinyGPS::gpsatol(char const*)’:
C:\Documents and Settings\Gebruiker\Mijn documenten\Arduino\libraries\TinyGPS/TinyGPS.cpp:278: multiple definition of `TinyGPS::gpsatol(char const*)’
TinyGPS.cpp.o:C:\DOCUME~1\GEBRUI~1\LOCALS~1\Temp\build5425500241782305192.tmp/TinyGPS.cpp:278: first defined here
TinyGPS\TinyGPS.cpp.o: In function `TinyGPS::gpsstrcmp(char const*, char const*)’:
C:\Documents and Settings\Gebruiker\Mijn documenten\Arduino\libraries\TinyGPS/TinyGPS.cpp:286: multiple definition of `TinyGPS::gpsstrcmp(char const*, char const*)’
TinyGPS.cpp.o:C:\DOCUME~1\GEBRUI~1\LOCALS~1\Temp\build5425500241782305192.tmp/TinyGPS.cpp:286: first defined here
TinyGPS\TinyGPS.cpp.o: In function `TinyGPS::cardinal(float)’:
C:\Documents and Settings\Gebruiker\Mijn documenten\Arduino\libraries\TinyGPS/TinyGPS.cpp:339: multiple definition of `TinyGPS::cardinal(float)’
TinyGPS.cpp.o:C:\DOCUME~1\GEBRUI~1\LOCALS~1\Temp\build5425500241782305192.tmp/TinyGPS.cpp:339: first defined here
TinyGPS\TinyGPS.cpp.o: In function `TinyGPS::f_altitude()’:
C:\Documents and Settings\Gebruiker\Mijn documenten\Arduino\libraries\TinyGPS/TinyGPS.cpp:393: multiple definition of `TinyGPS::f_altitude()’
TinyGPS.cpp.o:C:\DOCUME~1\GEBRUI~1\LOCALS~1\Temp\build5425500241782305192.tmp/TinyGPS.cpp:393: first defined here
TinyGPS\TinyGPS.cpp.o: In function `TinyGPS::f_course()’:
C:\Documents and Settings\Gebruiker\Mijn documenten\Arduino\libraries\TinyGPS/TinyGPS.cpp:398: multiple definition of `TinyGPS::f_course()’
TinyGPS.cpp.o:C:\DOCUME~1\GEBRUI~1\LOCALS~1\Temp\build5425500241782305192.tmp/TinyGPS.cpp:398: first defined here
TinyGPS\TinyGPS.cpp.o: In function `TinyGPS::f_speed_knots()’:
C:\Documents and Settings\Gebruiker\Mijn documenten\Arduino\libraries\TinyGPS/TinyGPS.cpp:403: multiple definition of `TinyGPS::f_speed_knots()’
TinyGPS.cpp.o:C:\DOCUME~1\GEBRUI~1\LOCALS~1\Temp\build5425500241782305192.tmp/TinyGPS.cpp:403: first defined here
TinyGPS\TinyGPS.cpp.o: In function `TinyGPS::f_speed_mph()’:
C:\Documents and Settings\Gebruiker\Mijn documenten\Arduino\libraries\TinyGPS/TinyGPS.cpp:406: multiple definition of `TinyGPS::f_speed_mph()’
TinyGPS.cpp.o:C:\DOCUME~1\GEBRUI~1\LOCALS~1\Temp\build5425500241782305192.tmp/TinyGPS.cpp:406: first defined here
TinyGPS\TinyGPS.cpp.o: In function `TinyGPS::f_speed_mps()’:
C:\Documents and Settings\Gebruiker\Mijn documenten\Arduino\libraries\TinyGPS/TinyGPS.cpp:412: multiple definition of `TinyGPS::f_speed_mps()’
TinyGPS.cpp.o:C:\DOCUME~1\GEBRUI~1\LOCALS~1\Temp\build5425500241782305192.tmp/TinyGPS.cpp:412: first defined here
TinyGPS\TinyGPS.cpp.o: In function `TinyGPS::f_speed_kmph()’:
C:\Documents and Settings\Gebruiker\Mijn documenten\Arduino\libraries\TinyGPS/TinyGPS.cpp:418: multiple definition of `TinyGPS::f_speed_kmph()’
TinyGPS.cpp.o:C:\DOCUME~1\GEBRUI~1\LOCALS~1\Temp\build5425500241782305192.tmp/TinyGPS.cpp:418: first defined here
TinyGPS\TinyGPS.cpp.o: In function `TinyGPS::get_datetime(unsigned long*, unsigned long*, unsigned long*)’:
C:\Documents and Settings\Gebruiker\Mijn documenten\Arduino\libraries\TinyGPS/TinyGPS.cpp:357: multiple definition of `TinyGPS::get_datetime(unsigned long*, unsigned long*, unsigned long*)’
TinyGPS.cpp.o:C:\DOCUME~1\GEBRUI~1\LOCALS~1\Temp\build5425500241782305192.tmp/TinyGPS.cpp:357: first defined here
TinyGPS\TinyGPS.cpp.o: In function `TinyGPS::crack_datetime(int*, unsigned char*, unsigned char*, unsigned char*, unsigned char*, unsigned char*, unsigned char*, unsigned long*)’:
C:\Documents and Settings\Gebruiker\Mijn documenten\Arduino\libraries\TinyGPS/TinyGPS.cpp:374: multiple definition of `TinyGPS::crack_datetime(int*, unsigned char*, unsigned char*, unsigned char*, unsigned char*, unsigned char*, unsigned char*, unsigned long*)’
TinyGPS.cpp.o:C:\DOCUME~1\GEBRUI~1\LOCALS~1\Temp\build5425500241782305192.tmp/TinyGPS.cpp:374: first defined here
TinyGPS\TinyGPS.cpp.o: In function `TinyGPS::get_position(long*, long*, unsigned long*)’:
C:\Documents and Settings\Gebruiker\Mijn documenten\Arduino\libraries\TinyGPS/TinyGPS.cpp:348: multiple definition of `TinyGPS::get_position(long*, long*, unsigned long*)’
TinyGPS.cpp.o:C:\DOCUME~1\GEBRUI~1\LOCALS~1\Temp\build5425500241782305192.tmp/TinyGPS.cpp:348: first defined here
TinyGPS\TinyGPS.cpp.o: In function `TinyGPS::f_get_position(float*, float*, unsigned long*)’:
C:\Documents and Settings\Gebruiker\Mijn documenten\Arduino\libraries\TinyGPS/TinyGPS.cpp:365: multiple definition of `TinyGPS::f_get_position(float*, float*, unsigned long*)’
TinyGPS.cpp.o:C:\DOCUME~1\GEBRUI~1\LOCALS~1\Temp\build5425500241782305192.tmp/TinyGPS.cpp:365: first defined here
TinyGPS\TinyGPS.cpp.o: In function `TinyGPS::course_to(float, float, float, float)’:
C:\Documents and Settings\Gebruiker\Mijn documenten\Arduino\libraries\TinyGPS/TinyGPS.cpp:319: multiple definition of `TinyGPS::course_to(float, float, float, float)’
TinyGPS.cpp.o:C:\DOCUME~1\GEBRUI~1\LOCALS~1\Temp\build5425500241782305192.tmp/TinyGPS.cpp:319: first defined here
TinyGPS\TinyGPS.cpp.o: In function `TinyGPS::distance_between(float, float, float, float)’:
C:\Documents and Settings\Gebruiker\Mijn documenten\Arduino\libraries\TinyGPS/TinyGPS.cpp:294: multiple definition of `TinyGPS::distance_between(float, float, float, float)’
TinyGPS.cpp.o:C:\DOCUME~1\GEBRUI~1\LOCALS~1\Temp\build5425500241782305192.tmp/TinyGPS.cpp:294: first defined here
TinyGPS\TinyGPS.cpp.o: In function `TinyGPS::term_complete()’:
C:\Documents and Settings\Gebruiker\Mijn documenten\Arduino\libraries\TinyGPS/TinyGPS.cpp:164: multiple definition of `TinyGPS::term_complete()’
TinyGPS.cpp.o:C:\DOCUME~1\GEBRUI~1\LOCALS~1\Temp\build5425500241782305192.tmp/TinyGPS.cpp:164: first defined here
TinyGPS\TinyGPS.cpp.o: In function `TinyGPS::encode(char)’:
C:\Documents and Settings\Gebruiker\Mijn documenten\Arduino\libraries\TinyGPS/TinyGPS.cpp:59: multiple definition of `TinyGPS::encode(char)’
TinyGPS.cpp.o:C:\DOCUME~1\GEBRUI~1\LOCALS~1\Temp\build5425500241782305192.tmp/TinyGPS.cpp:59: first defined here
TinyGPS\TinyGPS.cpp.o:(.rodata._ZN7TinyGPS19GPS_INVALID_F_ANGLEE+0×0): multiple definition of `TinyGPS::GPS_INVALID_F_ANGLE’
TinyGPS.cpp.o:(.rodata._ZN7TinyGPS19GPS_INVALID_F_ANGLEE+0×0): first defined here
TinyGPS\TinyGPS.cpp.o:(.rodata._ZN7TinyGPS22GPS_INVALID_F_ALTITUDEE+0×0): multiple definition of `TinyGPS::GPS_INVALID_F_ALTITUDE’
TinyGPS.cpp.o:(.rodata._ZN7TinyGPS22GPS_INVALID_F_ALTITUDEE+0×0): first defined here
TinyGPS\TinyGPS.cpp.o:(.rodata._ZN7TinyGPS19GPS_INVALID_F_SPEEDE+0×0): multiple definition of `TinyGPS::GPS_INVALID_F_SPEED’
TinyGPS.cpp.o:(.rodata._ZN7TinyGPS19GPS_INVALID_F_SPEEDE+0×0): first defined here
Martes, Julio 10th 2012 at 4:53 pm
Is it possible to run this on an 8 Mhz mini at 5 volts? In the mySoftwareSerial.cpp library I see the line: #if F_CPU == 16000000
Jueves, Julio 12th 2012 at 9:29 pm
@Gustav: seems you included twice the TinyGPS lib.
@Mike: I think there should be no problems as the most important part is the mySoftwareSerial, and it supports 8Mhz (I think). In the same file there is a #elif F_CPU == 8000000, so it should run nice :D
Lunes, Julio 16th 2012 at 8:11 pm
What software did you use to create the logo that generated hex code? I would like to create my own.
Lunes, Julio 16th 2012 at 10:05 pm
@Mike: from the OLED seller on ebay I got his example programs: http://www.wide.hk/download/i2c_OLED.rar
That rar contains i2c oled simple example and LCDAssistant.exe. It takes a bmp file as input and drops the hex array as output. Make sure to use a monochrome bmp sized to your display.
Sábado, Septiembre 29th 2012 at 8:57 pm
Hiya i am reciving this error. can you help me.
GPS_Toy.cpp: In function ‘void setup()’:
GPS_Toy:111: error: ‘PCintPort’ has not been declared
GPS_Toy:112: error: ‘PCintPort’ has not been declared
GPS_Toy.cpp: In function ‘void interrupt_button()’:
GPS_Toy:339: error: ‘PCintPort’ has not been declared
GPS_Toy:341: error: ‘PCintPort’ has not been declared
Regards
Brendan
Sábado, Septiembre 29th 2012 at 9:26 pm
ignore my last comment i worked it out
Thanks it works great
:D
Miércoles, Octubre 17th 2012 at 6:56 pm
Great build! But I have big problems with the software. I use Adruino 1.0 and get a lot of errors. Has anyone solved the problems and can help me? The best way will be to send me the complete packing list
Lunes, Octubre 22nd 2012 at 3:35 pm
You probably are missing some library. Check you have all needed libraries (TinyGPS and PinChangeInt)
Viernes, Octubre 26th 2012 at 8:10 am
With the help of Lukas I solved my problems. Put the GPS-Toy file into the files of the Skathbook . All the others (TinyGPS and PinChangeInt) into the libraries of arduino. I am running a 8MHz board. Wokes fine. Thank you.
Viernes, Diciembre 28th 2012 at 7:38 pm
Hi. Nice project! what are the pin names/numbers that connect the arduino and the gps module? It seems only vin, GND and the grey one to arduino pin 4. Is’nt it a serial module?
Miércoles, Enero 16th 2013 at 11:11 am
Hello brunialti,
Indeed is a serial port but GPS doesn’t need to be initialited or configured so is not needed to conect tx from arduino to GPS rx.
Jueves, Febrero 14th 2013 at 9:39 pm
Hello! What a great project!! JUST LOOOOOVE IT!!! And thank you for putting out the code! I am playing with it but don’t know how to code a Skylab SKM53 GPS on it… It irritates me! Any one has a clue? Please help!
Miércoles, Marzo 20th 2013 at 6:58 pm
Hi, I was looking for a tracking device for my bike… do you think we could add a gsm port something to send the position to another phone or server? Then we could hide it into some part of the bike…
The solution avaiable out there are too expensive…
Didn’t u think about it?
Jueves, Abril 25th 2013 at 7:50 am
What kind of changes did you make on mysoftware serial? I cannot get any readings from the Skylab skn53 GPS module! :(
Sábado, Mayo 4th 2013 at 1:47 pm
My modifications are just to disable interrupts on unsued port. Should work if you’re attaching your TX-RX GPS on same pins.