#1 2015-09-22 18:11:24

user11
Member
Registered: 2015-09-18
Posts: 8

Couple of projects built on micromodem and LibAPRS

Want to thank markqvist for this cool project and other members for support on forum regarding rx improvements, want to share couple of projects I made with micromodem.

First one is a standalone modem based on Arduino, which can work as a Bluetooth TNC (with APRSDroid) and as a USB KISS modem. It is based on LibAPRS, with small customization to allow work in both modes (bluetooth/usb) without need to re-flash or switch anything.

29vzzpl.jpg


10d86yb.jpg

Second is a standalone APRS tracker, with builtin GPS receiver and big nokia screen plus encoder to switch different modes of operation manually. This one is also based on LibAPRS, took a lot of time to optimize everything to fit into 2k or RAM, for example, nokia screen alone requires ~500 bytes for the screen buffer.

23h2hd1.jpg

282lxxh.jpg

2n9vl1c.jpg

Offline

#2 2015-09-28 22:33:48

markqvist
Administrator
Registered: 2014-12-01
Posts: 109

Re: Couple of projects built on micromodem and LibAPRS

These are some great projects! Thanks a lot for sharing! The tracker is really cool, and awesome job making the code fit on one MCU!

Offline

#3 2015-09-29 14:42:11

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

Re: Couple of projects built on micromodem and LibAPRS

Nice project ... is this 2 different boxes ??

I see one with BT and another with a display / GPS ....


Can you share your modified codes on github ?

Thanks


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

Offline

#4 2015-09-29 15:36:45

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

Re: Couple of projects built on micromodem and LibAPRS

Nice project ... is this 2 different boxes ??

I see one with BT and another with a display / GPS ....


Can you share your modified codes on github ?

Thanks


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

Offline

#5 2015-12-03 14:11:52

user11
Member
Registered: 2015-09-18
Posts: 8

Re: Couple of projects built on micromodem and LibAPRS

Yes, these are two different devices.

One is standalone tracker, which has integrated SkyLabs GPS receiver, nokia screen, rotary for user interaction. It has some limitation regarding incoming messages, due to only 2k SRAM on Arduino UNO. Using Arduino MEGA can eliminate these problem.

Another is very simple TNC modem, which has integrated Bluetooth transmitter and can work with Aprsdroid or with PC using usb-serial without need to re-program.

Placed sketchbooks and modified LibAPRS version on github if somebody will be interested, no schematics, only code:

https://github.com/sh123/aprs_tracker
https://github.com/sh123/bluetooth_tnc
https://github.com/sh123/LibAPRS/tree/aprs_tracker

Last edited by user11 (2015-12-03 14:15:14)

Offline

Board footer

Powered by FluxBB