# Photon Test Breakout Board

**URL:** <https://community.particle.io/t/photon-test-breakout-board/33222>\
**Category:** Hardware\
**Created:** [May 28, 2017, 7:54am UTC](https://community.particle.io/t/photon-test-breakout-board/33222 "2017-05-28T07:54:28Z")\
**Posts on this page:** 1\
**Showing post:** 24

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**Author:** ![rocksetta](https://sea2.discourse-cdn.com/flex026/user_avatar/community.particle.io/rocksetta/32/5099_2.png) [@rocksetta](https://community.particle.io/u/rocksetta)\
**Post date:** [June 12, 2017, 4:49pm UTC](https://community.particle.io/t/photon-test-breakout-board/33222/24 "2017-06-12T16:49:06Z")

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> [@rickkas7](#):
>
> The example in this post does 8 byte transfers, but you can simply make the data buffer smaller and it will transfer fewer bytes.

Thanks Rick. Very happy. Got my SPI both master and slave working really well.

I posted my code at

> [@Connecting 2 Photon via SPI](https://community.particle.io/t/connecting-2-photon-via-spi/31079/5):
>
> It took a lot of work to get this going. Here is my working code with the help of @rickkas7 The github is at [https://github.com/hpssjellis/particle-photon-testing-circuit/tree/master/individual-serial](https://github.com/hpssjellis/particle-photon-testing-circuit/tree/master/individual-serial) The 2 Photon SPI Serial breadboard:[image] The SPI Master // SPI-Master.ino // By Jeremy Ellis // MIT license // Use at your own risk! const unsigned long SEND\_PERIOD\_MS = 10000; const int SS\_PIN = A2; const size\_t NUM\_VALUES = 32; unsigned long lastSend = 0; uint32\_t rcvdValues[N…

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