Hi, i am new in node-red. I try to connect ultrasonic sensor HC-SR04 to raspberry pi 4 and use palette rpi-srf. This is my setting of palette rpi-srf: [Error GPIO_1] and after i click deploy, there is an warning appear under pallete rpi-srf that say "node-red:rpi-gpio.status.not-available" like …

There were changes made in the Pi OS late 2023 that affect the way GPIOs are accessed Can you possibly reformat and install the previous version (Bullseye) and see if it works in that?

Hi, Thank for your replay. I already tried but it doesn't work. When i try to control led with "button" node connect to "rpi-gpio out" node, everything works good. So "rpi-pisrf" is only node that doesn't work for me to connect to gpio

Yeah, sorry.... It has been a long time since I've played with this node. I am hoping someone else would be able to help you better than I can. (You did reboot after the config change?)

i also try to reinstall the OS on sd card, and reinstall the node-red again. but still doesn't work

indulge me: Open the RasPi GPIO node and take a screen shot. I may see something.

do you mean this node ? [image]

Ok, so you have to select which pins you want to talk to. I can't see any pins selected in that shot. Not to say there aren't. :slight_smile: EDIT Ok, I scrolled back and looked at your first picture. Pins 33 and 35. They aren't ticked. (Though it does say 17 and 18 are....) :confused:

Ya, I already select the pin on "rpi-pisrf" node. or do you have any suggestion to access ultrasonic sensor HC-SR04 with another node ?

Sorry which is this rpi-pisrf node? Oh, ok.... But when I look at the first screen shot it is saying it is using pins 33 and 35. YOU chose them. But in the last one of the GPIO node, pins 33 and 35 aren't ticked. I can't move past that. [pic1] [pic2] (BTW, maybe save screen shots as PNG no…

The first image that i post is setting for "rpi-pisrf" node. And the third post is setting of "rpi-gpio in" node that you request. So, it's display setting for difference node.

and both nodes need to use the same GPIO pins, or things won't work. And the device needs to also be connected to those pings. Not much good putting the device on GPIO pins (say) 12 and 13 and setting the GPIO node to look at pins 33 and 35 Not going to work. EDIT I guess I am going to have to a…

Node-red:rpi-gpio.status.not-available

General

vani 23 May 2024 10:58 21

Yes, it works now. Thank You So Much cymplecy. I appriacete it. I was installed OS 64 bit bookworm on my Raspberry pi. Then I reinstalled with Raspberry Pi OS (Legacy) Bullseye like what you say. And know works well. Thank You

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Node-red:rpi-gpio.status.not-available

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