My friend (W6IPA) and I developed a versatile Raspberry-Pi hat that can be used for Allstar, Echolink, APRS, or any digital modes.
We use the program in this GitHub repository to program the radio module SA818 used for the Pi-Hat.
We have some PCB left. We are selling them for $25 on tindie. You can also visit the this blog post about this program
Before programming the SA818 module, make sure you consult the band plan for your country and transmit on a frequency you are allowed to use.
The easiest way to install is program is to use the command pip. Pip
will automatically take care of installing the dependencies.
$ sudo pip install sa818
You can also clone this repository and use the setup.py script with
the following command. You will have to install the python package
pyserial manually. To install dependencies, refer to the manual of
your operating system.
$ git clone https://github.com/0x9900/SA818.git
$ sudo python3 setup.py install
[root@allstar ~]# sa818 version
SA818: INFO: Firmware version: V4.2
[root@allstar ~]# sa818 radio --frequency 145.230 --offset -.6 --ctcss 100
SA818: INFO: +DMOSETGROUP:0, RX frequency: 145.2300, TX frequency: 144.6300, ctcss: 100.0, squelch: 4, OK
[root@allstar ~]# sa818 volume --level 5
SA818: INFO: +DMOSETVOLUME:0 Volume level: 5
If you use an FTDI dongle to program the SA828 module the USB port can
be specified with the --port argument
[root@allstar ~]# sa818 --port /dev/ttyAMA0 volume --level 5
SA818: INFO: +DMOSETVOLUME:0 Volume level: 5
This program has for sections:
- radio: Program the radio's frequency, tone and squelch level
- volume: Set the volume level
- filters: Turn on or off the [pre/de]-emphasis and as well as the high and low pass filter
- version: display the firmware version of the SA818 module
usage: sa818 [-h] [--port PORT] [--debug]
{radio,volume,filters,version} ...
generate configuration for switch port
positional arguments:
{radio,volume,filters,version}
radio Program the radio (frequency/tome/squelch)
volume Set the volume level
filters Set filters
version Show the firmware version of the SA818
optional arguments:
-h, --help show this help message and exit
--port PORT Serial port [default: linux console port]
--debug
usage: sa818 radio [-h] --frequency FREQUENCY [--offset OFFSET]
[--squelch SQUELCH] [--ctcss CTCSS | --dcs DCS]
optional arguments:
-h, --help show this help message and exit
--frequency FREQUENCY
Transmit frequency
--offset OFFSET 0.0 for no offset [default: 0.0]
--squelch SQUELCH Squelch value (1 to 9) [default: 4]
--ctcss CTCSS CTCSS (PL Tone) 0 for no CTCSS [default: None]
--dcs DCS DCS code must me the number followed by [N normal] or
[I inverse] [default: None]
usage: sa818 volume [-h] [--level LEVEL]
optional arguments:
-h, --help show this help message and exit
--level LEVEL Volume value (1 to 8) [default: 4]
usage: sa818 filters [-h] [--emphasis EMPHASIS] [--highpass HIGHPASS]
[--lowpass LOWPASS]
optional arguments:
-h, --help show this help message and exit
--emphasis EMPHASIS Enable [Pr/De]-emphasis (yes/no) [default: no]
--highpass HIGHPASS Enable high pass filter (yes/no) [default: no]
--lowpass LOWPASS Enable low pass filters (yes/no) [default: no]
67.0, 71.9, 74.4, 77.0, 79.7, 82.5, 85.4, 88.5, 91.5, 94.8, 97.4,
100.0, 103.5, 107.2, 110.9, 114.8, 118.8, 123.0, 127.3, 131.8, 136.5,
141.3, 146.2, 151.4, 156.7, 162.2, 167.9, 173.8, 179.9, 186.2, 192.8,
203.5, 210.7, 218.1, 225.7, 233.6, 241.8, 250.3
DCS codes must be followed by N or I for Normal or Inverse:
Example: 047I
023, 025, 026, 031, 032, 036, 043, 047, 051, 053, 054, 065, 071, 072,
073, 074, 114, 115, 116, 122, 125, 131, 132, 134, 143, 145, 152, 155,
156, 162, 165, 172, 174, 205, 212, 223, 225, 226, 243, 244, 245, 246,
251, 252, 255, 261, 263, 265, 266, 271, 274, 306, 311, 315, 325, 331,
332, 343, 346, 351, 356, 364, 365, 371, 411, 412, 413, 423, 431, 432,
445, 446, 452, 454, 455, 462, 464, 465, 466, 503, 506, 516, 523, 526,
532, 546, 565, 606, 612, 624, 627, 631, 632, 654, 662, 664, 703, 712,
723, 731, 732, 734, 743, 754