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mikaelnousiainen / RS41ng

Custom firmware for Vaisala RS41 and Graw DFM-17 radiosondes with support for amateur radio use. Ideal for tracking high-altitude balloons. Supported modes include APRS, Horus 4FSK mode, CATS, morse code (CW) and additional digital modes like WSPR and FT8 via Si5351.
GNU General Public License v2.0
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CATS not transmitting from DFM-17 #93

Open rpratt20 opened 5 months ago

rpratt20 commented 5 months ago

I spent a few hours this afternoon attempting to try the new cats option. I programmed a sequence of APRS, Hv2, cats with 30 second repeating cycle. APRS and HV2 both transmitted and decoded. I could not identify a cats transmission at all. I tried the cats-sdr-software, an ht set to the frequency and an sdr# but no signal at all transmitted from the DFM. I used the GitHub cats settings other than call sign and comment text and the not balloon reporting option. The cats sdr receiving station did appear on APRS.fi along with the APRS icon from the DFM APRS transmission received through APRS.

rpratt20 commented 5 months ago

I tried a few CATS settings again this morning. With only CATS and no APRS or HV2 in the rotation the board appears to hang in boot mode. The green and yellow leds remain on steady again with no rf transmitted. Adding a combination APRS CATS rotation allows booting and APRS transmitting with the CATS never keying.

rpratt20 commented 5 months ago

This is partially solved. I found that file radio.c did not update when I changed version to include Cats. I now have transmission as scheduled but I have not achieved any decoding.

scd31 commented 5 months ago

meow meow meow!

What software/hardware are you running for decoding? Also, do you hear the CATS packets on a normal FM/SSB transceiver?

rpratt20 commented 5 months ago

Hello,I was using the cats-sdr-igate with an old rtl-sdr on Ubuntu. I’ve now re-installed drivers and connected a new rtl-sdr v3.  Later yesterday I was able to decode reliably. I plan to retry the old sdr today because it was decoding Horus v2 and regular APRS. The cats position packets appear to transmit faster than a Baofeng can produce any more than a click. Often the receive led does not blink. I suspect battery life might be greatly extended on the transmitter.  The issue I submitted can be closed as the problems appear to have been mine.RandySent from my iPhoneOn Jun 11, 2024, at 14:34, Stephen D @.***> wrote: meow meow meow! What software/hardware are you running for decoding? Also, do you hear the CATS packets on a normal FM/SSB transceiver?

—Reply to this email directly, view it on GitHub, or unsubscribe.You are receiving this because you authored the thread.Message ID: @.***>

scd31 commented 5 months ago

Glad you were able to get it sorted!

rpratt20 commented 5 months ago

I have note to add. With an old sdr the config.toml file must be manually set to compensate ppm error in the older sdr. There is no compensation entry.

scd31 commented 5 months ago

Yeah that sounds about right. I don't think I bothered to add a ppm option to the SDR I-Gate