I have reflashed a sonde to the SW made by OM3BC.
On his homepage http://www.om3bc.com/eng.htm i downloaded the rtty.hex file.
You can see some pages how to reflash the SW, I used this description:
Here a picture of my hardware setup:
The version i got is 3.2, although he describes the version 2.5.
this is the opening message when powering up the sonde:
Modified RS41 for CW, RTTY & APRS v.3.2 by OM3BC
The help and dsp output is a bit different.
When typing “help” you get these lines:
cmd>help
Allowed commands (not case sensitive):
BUTTON on/off – use button to turn off
LEDS on/off – use LEDs
POWER n – rf power n = 0 to 7 (7 is max.)
HOLDOFF n – n = time between two rtty messages in seconds
SERCOM n – speed of serial communication port (n = 300 to 115200)
RTTY on/off – send rtty message
RTTYFRQ n.n – n.n = rtty and cwid frequency in MHz
RTTYCALL string – rtty callsign (up to 15 characters)
BAUD n – n = rtty baudrate (max. 300)
DBITS n – n = rtty databits (7 or 8)
SBITS n – n = rtty stop bits (1 or 2)
SHIFT n – n = 1,2,3,4 or 270,540,810,1080 Hz
TEMP (or TEMPERATURE) on/off – send temperature in rtty messages
ALT (or ALTITUDE) on/off – send altitude in rtty messages
SPEED on/off – send speed in rtty messages
COURSE on/off – send course in rtty messages
UBAT on/off – send battery voltage in rtty messages
RTTY_WWL n – n = characters of wwlocator (only even numbers) in rtty messages
RTTY_TIME on/off – send time in rtty messages
SAT (or SATELLITES) on/off – send heard satellites in rtty messages
APRS on/off – send aprs messages
APRSFRQ n.n – n.n = aprs frequency in MHz
APRSCALL string – aprs callsign (up to 6 characters)
SSID n – aprs ssid n = 1 to 15
APRS_ALT on/off – send altitude in aprs ttext
SYMBOL string – symbol from aprs symbol table (2 characters)
RELAY string – aprs relays (WIDE1-1,WIDE2-1)
APRS_EVERY n – time between aprs messages is n x holdoff
TAIL_EVERY n – time between tail text is n x aprs time, 0 = no tail text
TTEXT string – tail text (up to 100 characters)
APRS_UBAT on/off – send battery voltage in aprs ttext
APRS_TEMP on/off – send radio chip temperature in aprs ttext
CWID on/off – send cwid messages
CWIDMESS string – cw message (up to 25 characters)
CWID_ALT on/off – send altitude via cw
CWID_UBAT on/off – send battery voltage via cw
CWID_WWL n – n = characters of wwlocator (only even numbers) in CW messages
CWID_EVERY n – time between cw messages is n x holdoff
CW_SPEED n n = cw speed in wpm
DISP – show parameters
DEF – set default values
SAVE – save parameters to flash
cmd>
My actual setting is shown when you type “disp”:
cmd>disp
Current parameters:
BUTTON ON
LEDS OFF
POWER approx. 0.8 mW
UART 9600 8-N-1
HOLDOFF 15 s
RTTY ON
RTTY and CWID FREQUENCY: 434.500 MHz
RTTY CALLSIGN: OZ2XH
RTTY BAUDRATE: 100 Bd
RTTY SHIFT: 540 Hz
RTTY DATA BITS: 7
RTTY STOP BITS: 2
RTTY TEMPERATURE: OFF
RTTY ALTITUDE: ON
RTTY SPEED: OFF
RTTY COURSE: OFF
RTTY BATTERY VOLTAGE: ON
RTTY SATELLITES: ON
RTTY WWL: OFF
RTTY TIME: ON
APRS ON
APRS FREQUENCY: 432.500 MHz
APRS CALLSIGN: NOCALL-11
APRS RELAY: WIDE1-1
APRS SYMBOL: /O
APRS EVERY: 1
APRS ALT: ON
APRS TAIL TEXT EVERY: 1
APRS TAIL TEXT: OZ2XH modified ballon tracker
APRS UBAT: OFF
APRS TEMP: OFF
CWID ON
CWID MESSAGE: TEST DE OZ2XH/AM
CWID SPEED: 60 WPM
CWID EVERY: 1
CWID WWL: OFF
CWID UBAT: OFF
CWID ALT: OFF
cmd>