#51 2015-01-18 19:09:34

Stanley
Member
From: Kuala Lumpur, Malaysia
Registered: 2014-12-01
Posts: 65
Website

Re: PicoAPRS, world's smallest APRS Transceiver with KISS TNC

NP4ZB10, you can use a mini pro, just do this circuit as the the link below and load in the firmware to the mini pro ....

https://github.com/markqvist/MicroModem … umentation


Stanley
9W2SVT/ N5SVT
http://9W2SVT.blogspot.com

Offline

#52 2015-01-19 02:00:21

np4zb10
Member
Registered: 2015-01-18
Posts: 4

Re: PicoAPRS, world's smallest APRS Transceiver with KISS TNC

HI Stanley,
thanks for the information.
Great setup. I'll like try the micro aprs setup using two arduinos. One for serial modem as the MicroAPRS,
and the other for TX/RX and GPS. I saw your Arduino Sketch: SVTrackR. Please let me know
how to set it up. I downloaded the MICROAPRS Hex. and it's working and the Sketch loaded on the other arduino.
I just need the connections to get it all together to work. Sorry I'm new to this.
Thanks again.

73's de NP4ZB/JORGE

Offline

#53 2015-01-20 22:24:37

aaitvedan
Member
Registered: 2014-12-18
Posts: 8

Re: PicoAPRS, world's smallest APRS Transceiver with KISS TNC

Hi Taner,

I have some progress. I see text on the display and I try now to connect the GPS.
The Adruino input for the GPS signal is D5? (pinMode(5, INPUT_PULLUP);) Is that right?

73, Renné PA1RP

Offline

#54 2015-01-20 22:29:46

DB1NTO
Member
Registered: 2014-12-01
Posts: 52

Re: PicoAPRS, world's smallest APRS Transceiver with KISS TNC

hi Renné,

no, D5 is for a button to dismiss received messages...

Do you use

SoftwareSerial TRX(2,3); // RX PIN 2 , TX PIN 3

OR

AltSoftSerial TRX; ???

if you use Altsoftserial, please look at: https://www.pjrc.com/teensy/td_libs_AltSoftSerial.html

Offline

#55 2015-01-20 22:53:09

aaitvedan
Member
Registered: 2014-12-18
Posts: 8

Re: PicoAPRS, world's smallest APRS Transceiver with KISS TNC

Hi Taner,

I compiled with software serial.
So it's pin 2 of the Software serial? That's the same connector that's also used for the FTDI?
It is the same processor that connects with the OLED display. Am I right?

Renné

Offline

#56 2015-01-20 23:31:58

np4zb10
Member
Registered: 2015-01-18
Posts: 4

Re: PicoAPRS, world's smallest APRS Transceiver with KISS TNC

Hi Taner,
Can you please display on how to connect the two arduinos to the transceiver and the GPS.
I'm new to Arduino programing. Thanks for your understanding.

73's de NP4ZB/Jorge.

Last edited by np4zb10 (2015-01-20 23:32:52)

Offline

#57 2015-01-21 00:06:22

DB1NTO
Member
Registered: 2014-12-01
Posts: 52

Re: PicoAPRS, world's smallest APRS Transceiver with KISS TNC

Connect GPS TX PIN on PIN 8 from Arduino
and RX PIN from your TRX to PIN 9 on Arduino

Taner

Offline

#58 2015-01-21 16:05:59

aaitvedan
Member
Registered: 2014-12-18
Posts: 8

Re: PicoAPRS, world's smallest APRS Transceiver with KISS TNC

Hi Taner,
It works, i see GPS information on the display.
Thanks!
73, Renné PA1RP

Offline

#59 2015-02-04 07:03:49

la3bna
Member
Registered: 2014-12-18
Posts: 18

Re: PicoAPRS, world's smallest APRS Transceiver with KISS TNC

Tanner, did you reduce the output from the arduino to the dra818?

Evry schematic I see has a 100K pot to reduse the peak - peak value in to the radio.

Offline

#60 2015-02-16 14:59:30

Stanley
Member
From: Kuala Lumpur, Malaysia
Registered: 2014-12-01
Posts: 65
Website

Re: PicoAPRS, world's smallest APRS Transceiver with KISS TNC

Dear Taner,

I finally got the Sunrise Electronics 1W radio working ... it is command compatible with DORJI with a bit of extra cmds and flags ..
Product URL :- http://www.sunrisedigit.com/en/Show.asp?id=34

I notice yr code, the GPS and DORJI radio is connected to pin 8,9 ... I assume u do Tx only for Radio and Rx only for gps , right ?? What a pin saving method... cool...


np4zb10,

Sorry, I missed yr messages as I didn't turn on reply notifications...

http://9w2svt.blogspot.com/2014/07/buil … -aprs.html
http://9w2svt.blogspot.com/2014/12/upda … -oled.html

My Repo :-
https://github.com/stanleyseow/ArduinoTracker-MicroAPRS

Last edited by Stanley (2015-02-16 15:01:06)


Stanley
9W2SVT/ N5SVT
http://9W2SVT.blogspot.com

Offline

#61 2015-02-16 18:35:25

np4zb10
Member
Registered: 2015-01-18
Posts: 4

Re: PicoAPRS, world's smallest APRS Transceiver with KISS TNC

Thanks for the great information Stanley,
I have the display connected to one Arduino Nano and it's working.
I bought the transceiver from ebay, and it's on the way.
I'm building now the Micromodem to complete the setup.

73's

Offline

#62 2015-02-28 23:31:51

LZ1PPL
Member
Registered: 2014-12-22
Posts: 13

Re: PicoAPRS, world's smallest APRS Transceiver with KISS TNC

Hi Taner,

Whit your code as a base and LibAPRS I have made battery powered APRS Tracker whit one Arduino Pro Mini. I have added additional information on the display for the battery voltage and Maidenhead locator.
I haven't tested the receive function yet but it transmits correct.
I know that my code is not perfect and i plan to optimize it, but for now its working fine.

You can see the code here: https://github.com/LZ1PPL/VSTv2/blob/master/VSTv2.ino

I still intend to do some thing about this project when i have a free time.
1. Optimize the code.
2. Add option to setup some variables true PC.
3. Make a PCB for the tracker.

73's to all

Last edited by LZ1PPL (2015-02-28 23:32:28)

Offline

#63 2015-03-01 06:29:01

WA6MAT
Member
Registered: 2015-03-01
Posts: 2

Re: PicoAPRS, world's smallest APRS Transceiver with KISS TNC

LZ1PPL wrote:

Hi Taner,

Whit your code as a base and LibAPRS I have made battery powered APRS Tracker whit one Arduino Pro Mini. I have added additional information on the display for the battery voltage and Maidenhead locator.
I haven't tested the receive function yet but it transmits correct.
I know that my code is not perfect and i plan to optimize it, but for now its working fine.

You can see the code here: https://github.com/LZ1PPL/VSTv2/blob/master/VSTv2.ino

I still intend to do some thing about this project when i have a free time.
1. Optimize the code.
2. Add option to setup some variables true PC.
3. Make a PCB for the tracker.

73's to all

Do you have a basic schematic? I dont need much, just which pins go where(since i seem to have missed it 100% in your code)

Offline

#64 2015-03-01 06:42:30

LZ1PPL
Member
Registered: 2014-12-22
Posts: 13

Re: PicoAPRS, world's smallest APRS Transceiver with KISS TNC

WA6MAT wrote:

Do you have a basic schematic? I dont need much, just which pins go where(since i seem to have missed it 100% in your code)


The OLED display is connected to A4 A5(I2C). The GPS module is connected to RX pin. The DORJI module to TX. The rest is like the MicroModem schematic.

73
Plamen

Last edited by LZ1PPL (2015-03-01 06:47:58)

Offline

#65 2015-03-08 07:14:06

WA6MAT
Member
Registered: 2015-03-01
Posts: 2

Re: PicoAPRS, world's smallest APRS Transceiver with KISS TNC

LZ1PPL wrote:
WA6MAT wrote:

Do you have a basic schematic? I dont need much, just which pins go where(since i seem to have missed it 100% in your code)


The OLED display is connected to A4 A5(I2C). The GPS module is connected to RX pin. The DORJI module to TX. The rest is like the MicroModem schematic.

73
Plamen


I wired everything up as you said, with the exception of the OLED display as i do not have one. My module does nothing. I put an oscilloscope on the RX pin and confirmed serial data is coming from GPS, although when you go into Serial Monitor from Arduino IDE, i see the AT+DMOSETGROUP commands going into to modem, and can confirm it with the scope, but i do not see anything else, no GPS on that screen(intended?) and the modem never transmits. The other thing i discovered is that my module got very very hot, it is wired with the correct polarity and correct voltages, i confirmed that multiple times, but its like it is keyed up 100% of the time.

Thoughts??

Thanks,
Matthew

Offline

#66 2015-03-09 14:08:29

LZ1PPL
Member
Registered: 2014-12-22
Posts: 13

Re: PicoAPRS, world's smallest APRS Transceiver with KISS TNC

Ok. With the serial monitor the AT+DMOSETGROUP commands is the only thing you will see. I haven't added any kind of diagnostic massages because im very low on ram, but the rest is very strange. The module should transmit once every 15 min. for a period of 2 3 sec. I will try to post some schematics of my project later tonight so you can check the connections.
But at the moment im at work and cant give you any suggestions. I will try to do it later tonight.

Offline

#67 2015-03-09 22:05:41

LZ1PPL
Member
Registered: 2014-12-22
Posts: 13

Re: PicoAPRS, world's smallest APRS Transceiver with KISS TNC

Here is the schematic im using. https://drive.google.com/file/d/0Bz49Vw … sp=sharing

You can check the signals from you arduino. Pin 3 should be low when not transmitting and high when transmitting. This is the PTT pin. After the transistor you should have high when not transmitting and low when transmitting, the DORJI module ptt is active when its connected to ground.
Digital pins 4, 5 and 6 should be low when not sending data and digital pin 7 should be high. Wen sending data pins 4, 5 and 6 should go to high and pin 7 to low. Whit the trimer you can set up the voltage level that is going to the mic in of the dorji module.

P.S.: My English is not perfect but i hope you will understand what i wanted to say.

73,
Plamen

Last edited by LZ1PPL (2015-03-09 22:06:50)

Offline

#68 2015-03-10 05:58:31

Stanley
Member
From: Kuala Lumpur, Malaysia
Registered: 2014-12-01
Posts: 65
Website

Re: PicoAPRS, world's smallest APRS Transceiver with KISS TNC

On the circuit, something to add, according to the manufacturer, the radio shd be connected to Li-On ( 3.7-4.2V) instead of 3.3V regulator as the 3.3V source would not be able to draw the required current during 1W tx ..


Stanley
9W2SVT/ N5SVT
http://9W2SVT.blogspot.com

Offline

#69 2015-03-10 08:19:12

LZ1PPL
Member
Registered: 2014-12-22
Posts: 13

Re: PicoAPRS, world's smallest APRS Transceiver with KISS TNC

Stanley wrote:

On the circuit, something to add, according to the manufacturer, the radio shd be connected to Li-On ( 3.7-4.2V) instead of 3.3V regulator as the 3.3V source would not be able to draw the required current during 1W tx ..

Thats correct.
And one more thing i have missed on the circuit barbecue i was in a hurry. The analog reference pin on the atmega should be connected to regulated 3.3v.

Offline

#70 2015-03-12 02:46:32

KF7MAX
Member
Registered: 2015-01-21
Posts: 10

Re: PicoAPRS, world's smallest APRS Transceiver with KISS TNC

mmmm Getting this when trying to compile/upload.

All the libraries etc exist in what I take are the proper locations etc.
Any thoughts, thanks folks.
..>Max

In file included from APRS_Code.ino:1:0:
C:\Program Files (x86)\Arduino\libraries\MicroAPRS/MicroAPRS.h:11:3: error: 'boolean' does not name a type
   boolean decode_posit(char *packet, char **pcall, char *ptype, char **pposit, long *plon, long *plat, char **pcomment, char **pmsgTo, char **pmsg, char *pmsgID);

Offline

#71 2015-03-12 07:18:26

Stanley
Member
From: Kuala Lumpur, Malaysia
Registered: 2014-12-01
Posts: 65
Website

Re: PicoAPRS, world's smallest APRS Transceiver with KISS TNC

There are many revisions and forks of these codes/libraries, perhaps you could post yr codes to pastebin.com and paste the URL here ...


Stanley
9W2SVT/ N5SVT
http://9W2SVT.blogspot.com

Offline

#72 2015-03-13 12:06:55

RN6LJT
Member
Registered: 2015-03-13
Posts: 3

Re: PicoAPRS, world's smallest APRS Transceiver with KISS TNC

Good afternoon. I am quite a novice in programming controllers. But I am very interested in this scheme https://drive.google.com/file/d/0Bz49Vw … sp=sharing
But I ran into a problem that occurs in post # 70.
LZ1PPL is it possible to put a list of libraries used in this Projects? Or explain how to correct the mistake of post # 70.
Thanks in advance.

Offline

#73 2015-03-14 09:32:48

LZ1PPL
Member
Registered: 2014-12-22
Posts: 13

Re: PicoAPRS, world's smallest APRS Transceiver with KISS TNC

Hi,
Im using the standard LibAPRS, TinyGPS++ and U8glib Libraries and Arduino1.0.5. I just downloaded the code from Github and the library's in a clean install of Arduino and it compiled whiteout any problem. I tried also Arduino 1.6.0 and 1.6.1 also no problems at all. I even tied on another freshly installed pc also no problems. So i have no idea know what you are doing wrong.

73,
Plamen LZ1PPL

Offline

#74 2015-03-16 20:30:59

RN6LJT
Member
Registered: 2015-03-13
Posts: 3

Re: PicoAPRS, world's smallest APRS Transceiver with KISS TNC

Thank you very much for your reply. It helped, and I programmed the controller.

Offline

#75 2015-03-17 04:27:00

KF7MAX
Member
Registered: 2015-01-21
Posts: 10

Re: PicoAPRS, world's smallest APRS Transceiver with KISS TNC

OK so my program compiled and downloaded just fine, setup to just the read GPS, run the display and transmit on the radio chip.
I have the 3.x volt Pro Mini.... but where in the code do I change pin assignments as my mini does not have an A4 or A5.
Just A0 to A3. At least on the boards pinouts? Not that great at reading the C code.. I can tell pretty much what each function
does,, but not what it is actually talking to with respect to pin reads writes. I got it to read the GPS, but need to have the display working.
Been through the messages a few times, just not getting it.
Thanks in advance.

Offline

Board footer

Powered by FluxBB