node-red version:V1.3.5 node.js version: v14.17.2 linux 5.10.17-v7l +arm LE So I am running simple LED on/off and capturing image using nodered and picamera. [pi] [led] So my led was not turned on when I press 1. and picamera capture image but there is no image data. So can anyone guide me to…

Hi I have solved the issue. The issue is that I don't properly installed the npm with gpio library.Thank you all for your suggestion.

The picture doesn't help - sorry. To which GPIO pins is the LED connected? Obviously one side is connected to a GPIO pin, but the other is either connected to +5, +3.3 or 0v. Until that is known it is difficult to know what is happening. And is the LED the right way around? (Gotta ask)

[image] Trying_to_learn: but the other is either connected to +5, +3.3 or 0v. Should be GPIO and GND (Yes, it can technically work the other way, but not normal except when using common anode RGB LED... but then all the GPIO code is backward :stuck_out_tongue: And when rereading your post I …

Hi yes, thanks for the info. So I have connected to pin40(GPIO21) yellow wire, and then Ground-39 as ground pin(black wire). And LED is connected in the right way also. [pinext]

Annnd.... how are you setting up the node? Digital or PWM? Have you tested the LED without Node-Red and thus confirmed all the hardware and wiring work?

I am setting the node as Digital output node. And I haven't tested the LED without Node-Red. But I can confirm that the hardware and wiring is correct and is working.

This is what should be pre-installed with some OS (for the pi) https://gpiozero.readthedocs.io/en/stable/installing.html And I believe this is the one specifically referenced by the node [image] RPi.GPIO A module to control Raspberry Pi GPIO channels

Thank you for your help. I have installed that library but the issue still persists. After I doublechecked, I think there is some problem with LED. And could you suggest any tutorials for taking picture with pi camera once I press the push button and using MQTT module?

I have this experiment... No MQTT for it yet, but is shows the image in the workspace and on dashboard. Button will only let you press it once every 10 seconds (it can take about 5 to show the image), and I have a Pan and Tilt setup with my camera, but it uses the PCA9685 i2c expander for stable ha…

Thanks for the help. I still have one more question. I don't know why my button got no signal. could you help me with that? [unnamed (2)] [unnamed (1)] [unnamed]

Raspberry pi gpio led not working

General

Gunner 6 July 2021 03:26 7

Then you probably haven't installed any GPIO libraries... as per the Help files for that node.

And depending on the OS you installed, one may not have been pre-installed.

BTW, while I have tested that node OK with Boolean (TRUE/FALSE), number (1/0) is the preferred payload

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Raspberry pi gpio led not working

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