# Sound card WM8960 and COS / PTT via GPIO RPI? **URL:** \ **Category:** AllStarLink\ **Created:** [September 19, 2026, 12:47pm UTC](https://community.allstarlink.org/t/sound-card-wm8960-and-cos-ptt-via-gpio-rpi/24998 "2026-09-19T12:47:46Z")\ **Posts on this page:** 5\ **Page:** 1
**Author:** ![SP2ONG](https://community.allstarlink.org/letter_avatar_proxy/v4/letter/s/c37758/32.png) [@SP2ONG](https://community.allstarlink.org/u/SP2ONG)\ **Post date:** [September 19, 2026, 12:47pm UTC](https://community.allstarlink.org/t/sound-card-wm8960-and-cos-ptt-via-gpio-rpi/24998/1 "2026-09-19T12:47:46Z")
Hi, I have a ready-made board featuring the SA818 module and a WM8960 sound card (via I2S), along with SQL/COS and PTT control via GPIO; it plugs into the Raspberry Pi's 40-pin header and works perfectly with SvxLink. However, I want to use this hardware with AllStarLink 3. Is there a way to support it? I assume the sound card will work, as it is detected just like other cards (e.g., the CM108), but is there a method—perhaps using a Python 3 script—to pass RPi GPIO state changes (PTT and COS/SQL) to AllStarLink 3? My understanding is that AllStarLink doesn't natively monitor RPi GPIO pins for COS and PTT functions. Could a script like that send a "COS 1" or "COS 0" signal via an AMI connection to Asterisk so that AllStarLink knows the COS is active or PTT is engaged? 73 Waldek ---
**Author:** ![N8EI](https://community.allstarlink.org/user_avatar/community.allstarlink.org/n8ei/32/4254_2.png) [@N8EI](https://community.allstarlink.org/u/N8EI)\ **Post date:** [September 19, 2026, 1:56pm UTC](https://community.allstarlink.org/t/sound-card-wm8960-and-cos-ptt-via-gpio-rpi/24998/2 "2026-09-19T13:56:48Z")
At this time, only CM108/109/119 audio chips work. ---
**Author:** ![SP2ONG](https://community.allstarlink.org/letter_avatar_proxy/v4/letter/s/c37758/32.png) [@SP2ONG](https://community.allstarlink.org/u/SP2ONG)\ **Post date:** [September 19, 2026, 2:47pm UTC](https://community.allstarlink.org/t/sound-card-wm8960-and-cos-ptt-via-gpio-rpi/24998/3 "2026-09-19T14:47:01Z")
Thank you for the information 73 Waldek ---
**Author:** ![W4HOO](https://community.allstarlink.org/letter_avatar_proxy/v4/letter/w/85f322/32.png) [@W4HOO](https://community.allstarlink.org/u/W4HOO)\ **Post date:** [September 22, 2026, 8:02am UTC](https://community.allstarlink.org/t/sound-card-wm8960-and-cos-ptt-via-gpio-rpi/24998/4 "2026-09-22T08:02:52Z")
Hello @SP2ONG , I am curious. What is the the ready-made board you are using? I have just started building SVXLink nodes and would love to know. Thank you. ---
**Author:** ![SP2ONG](https://community.allstarlink.org/letter_avatar_proxy/v4/letter/s/c37758/32.png) [@SP2ONG](https://community.allstarlink.org/u/SP2ONG)\ **Post date:** [September 22, 2026, 11:18am UTC](https://community.allstarlink.org/t/sound-card-wm8960-and-cos-ptt-via-gpio-rpi/24998/5 "2026-09-22T11:18:58Z")
For SVLink, you can use SHARI (with sound cards based on CM1xx) [SHARI PiXX – Kits 4 Hams](https://kits4hams.com/shari) or [SHARI PiXX – Kits 4 Hams](https://kits4hams.com/shari) or [HotspotRadios](https://hotspotradios.com/purchase-parts) or RF.Guru boards [HotSpot](https://shop.rf.guru/collections/hotspot) (these are based on WM8960 sound cards) and I also have a board based on: [GitHub - SQ4RD/Hotspot-WM8960-Respeaker · GitHub](https://github.com/SQ4RD/Hotspot-WM8960-Respeaker) SVXlink supports sound cards via ALSA and control can be via GPIO RPI or GPIO on CM1xx as in SHARI and HotspotRadios Of course, it also works with tiles [Repeater Builder USB-RIM Lite](https://www.repeater-builder.com/products/usb-rim-lite.html) 73 Waldek