<![CDATA[Stamp Pico and connecting more than one unit]]>I am creating a project using a Stamp Pico with a PIR sensor connected to the grove port. I want to connect a single relay unit to the Pico also. As there are no other grove ports I specified ‘custom’ for the port for the relay unit. I chose what came up initially, that was pins 21 and 22. My question is do I need to define the GPIO pins in UI flow (v1.13.2) in Python or can I stay using Blockley and they will be automatically defined?
Am I indeed using suitable pins for connecting the relay unit to the Pico?
Thanks for any/all help offered.

]]>https://community.m5stack.com/topic/6139/stamp-pico-and-connecting-more-than-one-unitRSS for NodeWed, 29 Apr 2026 05:35:58 GMTFri, 23 Feb 2024 12:03:02 GMT60<![CDATA[Reply to Stamp Pico and connecting more than one unit on Tue, 27 Feb 2024 10:39:30 GMT]]>@felmue said in Stamp Pico and connecting more than one unit:

PIR unit only needs one input GPIO and the relay unit only needs one output GPIO.

Thanks felmue I did get this working.

]]>https://community.m5stack.com/post/24167https://community.m5stack.com/post/24167Tue, 27 Feb 2024 10:39:30 GMT<![CDATA[Reply to Stamp Pico and connecting more than one unit on Fri, 23 Feb 2024 13:07:24 GMT]]>Hello @Kombistack

PIR unit only needs one input GPIO and the relay unit only needs one output GPIO. You can combine both to the same Groove port with default GPIOs using a Groove-T connector.
Below UIFlow blocks turn the relay on and off, depending on what the PIR sensor reports:

0_1708693638060_UI1_Stamp_PIR_Relay_20240223.png

Thanks
Felix

]]>https://community.m5stack.com/post/24066https://community.m5stack.com/post/24066Fri, 23 Feb 2024 13:07:24 GMT