> For the complete documentation index, see [llms.txt](https://docs.holybro.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.holybro.com/drone-development-kit/px4-vision-dev-kit-v1.5/v1-and-v1.5-difference.md).

# v1 & v1.5 Difference

<table><thead><tr><th width="177.00000000000003"></th><th></th><th></th></tr></thead><tbody><tr><td> </td><td><strong>PX4 Vision (v1)</strong></td><td><strong>PX4 Vision V1.5</strong></td></tr><tr><td><strong>Flight Controller</strong></td><td>Pixhawk 4</td><td>Pixhawk 6C</td></tr><tr><td><strong>Optical Flow</strong></td><td>AlienTek ATK-PMW3901</td><td>Thone ThoneFlow-3901U</td></tr><tr><td><strong>Connection</strong></td><td><ul><li>AlienTek ATK-PMW3901 connects to "SPI" port</li><li>TOF Infrared distance sensor (PSK-CM8JL65-CC5) connects to UART&#x26;I2C B</li></ul></td><td><ul><li>Thone ThoneFlow-3901U connects to "TELEM 3" Port</li><li>TOF Infrared distance sensor (PSK-CM8JL65-CC5) connects to "GPS 2" Port</li></ul></td></tr><tr><td><strong>Motor</strong></td><td>TMOTOR F60 PRO IV KV1750</td><td>TMOTOR P2207 V3.0 KV1750</td></tr><tr><td><strong>Propeller</strong></td><td>DALPROP 6045</td><td>Gemfan 6030-3</td></tr></tbody></table>


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