There is new APRS tracker founded on indyTracker official site.
With only one Arduino pro mini and GPS module you can create APRS tracker.
**Here is schema**
[URL=https://i.imgur.com/IY03bGy.png]
[IMG width=398 height=438 ]https://i.imgur.com/IY03bGy.png[/IMG][/URL]
To load configuration, connect USB-TTL adapter to Rx and Tx pin on Arduino, and open terminal program. You can use [putty ](https://www.chiark.greenend.org.uk/~sgtatham/putty/latest.html)
Select appropriate **COM** port and choose **9600 speed rate**.
Command `?disp` for list setup.
For writing new data use following construction ` ?wa?callsign-9` where
`?w` command for saving
`a?` variable to save
`callsign-9` string to save
**Existing variables are:**
```
a_MYCALL
b_Symbol_1
c_Symbol_2
d_PATH_1
e_PATH_2
f_FastSpeed
g_FastRate
h_SlowSpeed
i_SlowRate
j_GPS
k_TrackerMode
l_MyBeacon
```**Example of good configuration:**
```
a_MYCALL callsing-8
b_Symbol_1 />RUN
c_Symbol_2 \PSTOP
d_PATH_1 WIDE1-1
e_PATH_2 WIDE2-1
f_FastSpeed 70
g_FastRate 45
h_SlowSpeed 1
i_SlowRate 600
j_GPS 9600
k_TrackerMode 1
l_MyBeacon
```Best way to save you config is to prepare you config in Notepad and then paste line by line to Putty.
**Here is example of config from Notepad**
```
?wa?callsign-8
?wb?/>RUN
?wc?\PSTOP
?wd?WIDE1-1
?we?WIDE2-1
?wf?70
?wg?45
?wh?1
?wi?600
?wj?9600
?wk?1
?wl?MyBeacon
```
</s><i> </i>PIN 3 = PTT+ PIN 4 = PTT- PIN 5 = PWM AFSK out Rx = GPS 9600<i> </i><e>
More information on [facebook ](https://www.facebook.com/groups/aprsth/posts/4153898107978713/?__cft__[0]=AZWZyxhPNiEaBOMn5BkHSNk0FZGzLQRC4fhY5SZ5G0CGsPxxN_UJaxNixxoS24ROScGwdzRv73-OQ4CrZsb8IaOXQMDQ5fZSc05Ybrj5Agh1_rDkktS6qf9uJjBnP77OJsPcKovv4YAHHgjN6lKENFp4&__tn__=%2CO%2CP-R)