# OCTOPUS PRO 1.1 H723 is missing SPI3 mapping

**URL:** <https://klipper.discourse.group/t/octopus-pro-1-1-h723-is-missing-spi3-mapping/16749>\
**Category:** General Discussion\
**Created:** [May 30, 2024, 4:00pm UTC](https://klipper.discourse.group/t/octopus-pro-1-1-h723-is-missing-spi3-mapping/16749 "2024-05-30T16:00:38Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![tinkerman](https://yyz2.discourse-cdn.com/free1/user_avatar/klipper.discourse.group/tinkerman/32/5674_2.png) [@tinkerman](https://klipper.discourse.group/u/tinkerman)\
**Post date:** [May 30, 2024, 4:00pm UTC](https://klipper.discourse.group/t/octopus-pro-1-1-h723-is-missing-spi3-mapping/16749/1 "2024-05-30T16:00:38Z")

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### Basic Information:

Printer Model: Custom  
 MCU / Printerboard: OCTOPUS PRO 1.1 H723  
 Host / SBC: Orange PI 5  
 [klippy.log](https://klipper.discourse.group/uploads/short-url/ilADLICEsMrflfYo0vD3cIapWls.log) (29.8 KB)

### Describe your issue:

The H723 variant of the octopus pro 1.1 board (and I assume any board that uses this specific processor), can’t use the hardware SPI3 (which I tried with the accelerometer).

I did a bit of dig on the source code and the only thing I found was SPI bus for flashing (spi3a), at least that’s how I understood it.  
Using spi3 as bus returns a message that it doesn’t exist. I confirmed in the schematics it is there:

 ![image](https://global.discourse-cdn.com/free1/uploads/klipper/original/2X/1/1c31866af6517a869ac3163b48e570ef4b0b1eef.png)

But I did succeed setting the software SPI. And since there seems to be zero examples in the internet on how to use the SPI3 port for this specific variant, maybe it is a good idea to add to the example config:

**This works:**  
[adxl345]  
cs\_pin: PA15  
rate: 3200  
spi\_software\_sclk\_pin: PB3  
spi\_software\_mosi\_pin: PB5  
spi\_software\_miso\_pin: PB4  
axes\_map: -y, x, -z

**This does not work:**  
[adxl345]  
cs\_pin: PA15  
spi\_bus: spi3a # spi3 gives not found error.  
spi\_speed: 5000000  
rate: 3200  
axes\_map: -y, x, -z

Edit:  
I have also tried spi1a and that also doesn’t work. It conflicts with the built-in MAX amplifier

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**Author:** ![system](https://global.discourse-cdn.com/free1/uploads/klipper/original/1X/64419bf2aac6639e6ef5cef200dcd456b0a01ac3.png) [@system](https://klipper.discourse.group/u/system)\
**Post date:** [September 12, 2024, 6:02am UTC](https://klipper.discourse.group/t/octopus-pro-1-1-h723-is-missing-spi3-mapping/16749/3 "2024-09-12T06:02:02Z")

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