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Newest 'i2c' Questions - Raspberry Pi Stack Exchange
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Learn more about TeamsQuestions tagged [i2c]
I²C stands for Inter-Integrated circuit, and is a data transferation system that allows connections between computers or microcontrollers and low-level peripherals (e.g. sensors or EEPROMS). It is a multi-master, multi-slave, single-ended, serial computer bus.
813 questions
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OV5647 not detected via I2C despite overlay enabled
Body:
I'm trying to interface an OV5647 camera module with my Raspberry Pi 3B+ running Raspberry Pi OS Lite.
My setup:
I²C bus: 10
OV5647 address: 0x36
Reading registers: 0x300A (chip ID high), ...
0
votes
0
answers
21
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Loading I2C driver fails and kills bus
Summary
I have a b2qt yocto image using Qt6 built for CM4 and CM3. For the CM4 the driver works fine. For the CM3 the driver either fails to load or jams the bus resulting in i2cdetect showing all ...
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45
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PanTiltHat and i2c failing
I have a PanTilt Hat powered by two servos over i2c. The example code below works fine and the hat mechanism will move smoothly for many minutes until ended by being terminated using Ctrl-C from the ...
0
votes
1
answer
64
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I2C PCA9685P Raspberry Pi5 in C
I have been trying to work with the Upgraded Pan Tilt Platform for Official Raspberry Pi Camera Module which uses a PCA9685P. However, the web appears only to support data sheet for the PCA9685. This ...
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0
answers
46
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Impossible to use audremap and I2C at the same time on a Raspberry Pi Zero 2W
I'm using GPIO13 to generate sound with audremap and a Raspberry Pi Zero 2W.
I'm using GPIO3 SDA and GPIO 5 SCL to display on a LCD I2C screen at the same time and GPIO18 to power on the back light ...
0
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0
answers
58
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i2cdetect not detecting touchscreen
I have a Raspberry Pi Zero 2W and I'm trying to use this SPI + I2C touchscreen which uses the FT6336U driver with it. I've already set up the SPI part, but, when trying to detect the screen with GPIO ...
-1
votes
1
answer
176
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PCA9685 not detected on Raspberry Pi I2C (address 0x70) – any workaround?
I’m trying to control 12 servo motors using a PCA9685 16-channel PWM driver with my Raspberry Pi 4.
The board shows up on I2C at address 0x70 (confirmed via i2cdetect), but I’m unable to get it ...
1
vote
0
answers
28
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Trouble implementing FIFO buffer on LSM6DS3TRC with Raspberry Pi: buffer returns empty
I’m working with an LSM6DS3TR-C IMU sensor connected to a Raspberry Pi 4 running Ubuntu MATE 20.04 via I2C. I’m able to successfully read the raw data from the accelerometer and gyroscope using the ...
1
vote
0
answers
37
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Issue with TCA8418 Keypad on Raspberry Pi - Only Receiving MSC_SCAN Events
I am working with a TCA8418 keypad controller connected to a Raspberry Pi via I2C. The keypad is an 8x8 matrix, and I have buttons connected to row 7. My goal is to detect key events properly, ...
0
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1
answer
136
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- Errno 121 - Remote I/O error when sending data through i2c
I'm trying to send data to the RAM of a I2C LCD screen to clear the display (when I switch on the LCD and just after the init stage, many pixels are randomly initialized to 1 and not 0).
I'm using ...
-2
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2
answers
250
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1
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0
answers
45
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I2C access along with capacitive touch screen sensing
For a basic application I need a screen with some inputs from user, so I got a 2.8" screen with capacitive touch from Waveshare. Also I need inputs from an I2C sensor - possibly 10 bytes worth of ...
1
vote
1
answer
60
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1
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1
answer
116
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Raspberry pi does not detect magnetometer sensor
I have pi5, on which using MPU9250 sensor to detect Gyroscope, Accelerometer & Magnetometer. For some reason, PI5 is not detecting the I2C bus for Magnetometer.
Wire Connection used:
Interfacing ...
1
vote
1
answer
437
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Where are all I2C channels on Raspberry Pi Compute Module 5?
I see in the Raspberry Pi Compute Module 5 product brief that it has "Up to 5 x I2C", but when I look at the data sheet I only see channels 0-3.
How can I get all 5 I2C channels?
Which ...
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