# Spi Link 2 Axoloti Boards **URL:** \ **Category:** General\ **Created:** [May 13, 2025, 3:53pm UTC](https://ksoloti.discourse.group/t/spi-link-2-axoloti-boards/315 "2025-05-13T15:53:29Z")\ **Posts on this page:** 6\ **Page:** 1
**Author:** ![Blindsmyth](https://avatars.discourse-cdn.com/v4/letter/b/2acd7d/32.png) [@Blindsmyth](https://ksoloti.discourse.group/u/Blindsmyth)\ **Post date:** [May 13, 2025, 3:53pm UTC](https://ksoloti.discourse.group/t/spi-link-2-axoloti-boards/315/1 "2025-05-13T15:53:29Z")
Since the Beta firmware also supports Axoloti boards, I wanna link 2 of them and try it out. I can’t find any documentation on this though. Which pins do I have to interconnect? ---
**Author:** ![psychonaught](https://avatars.discourse-cdn.com/v4/letter/p/c68b51/32.png) [@psychonaught](https://ksoloti.discourse.group/u/psychonaught)\ **Post date:** [May 13, 2025, 5:08pm UTC](https://ksoloti.discourse.group/t/spi-link-2-axoloti-boards/315/2 "2025-05-13T17:08:39Z")
I’ve got a spare Axo kicking round too. It’d be good to get it working with my Kso.. ---
**Author:** ![Blindsmyth](https://avatars.discourse-cdn.com/v4/letter/b/2acd7d/32.png) [@Blindsmyth](https://ksoloti.discourse.group/u/Blindsmyth)\ **Post date:** [May 13, 2025, 9:45pm UTC](https://ksoloti.discourse.group/t/spi-link-2-axoloti-boards/315/3 "2025-05-13T21:45:51Z")
I looked at the axoloti schematic and asked Ai + looked what @Ksoloti wrote about this on discrod. this is the outcome: ![Bildschirmfoto 2025-05-13 um 23.42.19](https://global.discourse-cdn.com/free1/uploads/ksoloti1/original/1X/27f852bf023af34ec846a889c631b430f09ccb40.png) However this is not working yet. but theoretically you would have to conenct PA15 to PD5? ---
**Author:** ![Ksoloti](https://yyz2.discourse-cdn.com/free1/user_avatar/ksoloti.discourse.group/ksoloti/32/71_2.png) [@Ksoloti](https://ksoloti.discourse.group/u/Ksoloti)\ **Post date:** [May 14, 2025, 2:53am UTC](https://ksoloti.discourse.group/t/spi-link-2-axoloti-boards/315/4 "2025-05-14T02:53:50Z")
- X4-2 is **MCO (PA8)**, not GND. Connect X4-2 to X4-2. - Enable “synced” mode on one Axoloti Core by tying **X3-2 (PB10)** to GND. Leave X3-2 (PB10) open on the “master” Core. (On Ksoloti Core, there is the SPILINK\_SYNCED solder jumper on the bottom side of the PCB for this function.) ![rect15](https://global.discourse-cdn.com/free1/uploads/ksoloti1/original/1X/a266bd558ce203e0ba2582174d98e8f3ecc65b20.png) **SPI CS (=NSS) signal is** - **PA15** on Axoloti Core (because it is “reserved” and located on that X4 header) - **PD5** on Ksoloti Core (because PA15 has some other functions we would miss out on if we used it for SPILink) Fun fact, on Axoloti Core without SPILink you could actually use PA15, PB3, PB4, PD5 as additional GPIO. You could use the _ksoloti/gpio_ objects set to these respective pins then. PB10 too, technically (it can be a USART TX), though as you can see in the Axoloti Core schematic it has a 10k pullup so keep that in mind. ---
**Author:** ![Ksoloti](https://yyz2.discourse-cdn.com/free1/user_avatar/ksoloti.discourse.group/ksoloti/32/71_2.png) [@Ksoloti](https://ksoloti.discourse.group/u/Ksoloti)\ **Post date:** [May 14, 2025, 4:02am UTC](https://ksoloti.discourse.group/t/spi-link-2-axoloti-boards/315/5 "2025-05-14T04:02:41Z")
Update: I’ve just connected a Master Ksoloti to a Synced Axoloti and first tests are running well. Signals (spilink help patch) are being transferred without problems. YMMV The yellow wire isn’t connected anywhere. ![20250514_115725](https://global.discourse-cdn.com/free1/uploads/ksoloti1/original/1X/839adbbb9ed6f1dbbd7f149bc40cfac72b54432f.jpeg) ![20250514_115734](https://global.discourse-cdn.com/free1/uploads/ksoloti1/original/1X/02d4874484195de32684431f8ed7c0821e596eda.jpeg) ![20250514_115741](https://global.discourse-cdn.com/free1/uploads/ksoloti1/original/1X/9393f4802d246ea8492303cce706b37676723de7.jpeg) ![20250514_115752](https://global.discourse-cdn.com/free1/uploads/ksoloti1/original/1X/1eb298439a36ea4ec33dd60dc8f1a5d08921b325.jpeg) ---
**Author:** ![Blindsmyth](https://avatars.discourse-cdn.com/v4/letter/b/2acd7d/32.png) [@Blindsmyth](https://ksoloti.discourse.group/u/Blindsmyth)\ **Post date:** [May 15, 2025, 1:02pm UTC](https://ksoloti.discourse.group/t/spi-link-2-axoloti-boards/315/6 "2025-05-15T13:02:22Z")
This is great, thanks. Just running the help patch looks fine. Doing some test patching now to confirm 🙂