PCF8574 | Arduino library for PCF8574 - I2C IO expander

by RobTillaart C++ Version: 0.3.8 License: MIT

X-Ray Key Features Code Snippets Community Discussions(3)Vulnerabilities Install Support

kandi X-RAY | PCF8574 Summary

PCF8574 is a C++ library typically used in Internet of Things (IoT), Arduino applications. PCF8574 has no bugs, it has no vulnerabilities, it has a Permissive License and it has low support. You can download it from GitHub.

Related to the PCF8575 16 channel IO expander library This library gives easy control over the 8 pins of a PCF8574 and PCF8574A chip. These chips are identical in behavior although there are two distinct address ranges. So you can connect up to 16 PCF8574 on one I2C bus, giving access to 16 x 8 = 128 IO lines. To maximize IO lines combine 8 x PCF8575 + 8 x PCF8574A giving 128 + 64 = 192 IO lines. Be sure to have a well dimensioned power supply. The library allows to read and write both single pins or 8 pins at once. Furthermore some additional functions are implemented that are playful but useful.

Support

Quality

Security

License

Reuse

Support

PCF8574 has a low active ecosystem.

It has 69 star(s) with 26 fork(s). There are 5 watchers for this library.

It had no major release in the last 12 months.

There are 0 open issues and 16 have been closed. On average issues are closed in 55 days. There are no pull requests.

It has a neutral sentiment in the developer community.

The latest version of PCF8574 is 0.3.8

Quality

PCF8574 has 0 bugs and 0 code smells.

Security

PCF8574 has no vulnerabilities reported, and its dependent libraries have no vulnerabilities reported.

PCF8574 code analysis shows 0 unresolved vulnerabilities.

There are 0 security hotspots that need review.

License

PCF8574 is licensed under the MIT License. This license is Permissive.

Permissive licenses have the least restrictions, and you can use them in most projects.

Reuse

PCF8574 releases are available to install and integrate.

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PCF8574 Key Features

No Key Features are available at this moment for PCF8574.

PCF8574 Examples and Code Snippets

No Code Snippets are available at this moment for PCF8574.

Community Discussions

Trending Discussions on PCF8574

Connecting Waveshare LCD1602 RGB to Raspberry using C#

Delphi - 7 Segment Display

Problem writing to LCD screen with Raspberry Pi and BCM2835 libraries

QUESTION

Connecting Waveshare LCD1602 RGB to Raspberry using C#

Asked 2022-Jan-01 at 18:49

I am trying to connect LCD1602 RBG Waveshare to the Raspberry using C#. I connected it to the Raspberry and set the permissions, now trying to pass some data. The code below run all lines, but the LCD is not reacting. If anyone can advise me.

...

ANSWER

Answered 2022-Jan-01 at 18:49

The controller for these displays is normally a HD44780 or compatible. If the python sample works fine, then this should do:

Source https://stackoverflow.com/questions/70536639

QUESTION

Delphi - 7 Segment Display

Asked 2021-Apr-01 at 17:49

I am trying to solve a problem. I want to display multiple I/O functions (write_byte()) on a 7 segment display. I am using a PCF8574 iic. I tried to add two I/O functions together, but only one segment is turning red at a time. How can I make it happen, that multiple segments are turning red at the same time and stay red for a some time?

Here is my code

...

ANSWER

Answered 2021-Apr-01 at 15:42

When you are trying to write multiple segments, each write is replacing what you have written previously. You need to work out the number corresponding to the combination of segments you want to show, and then write that combined number, once.

There are a number of ways to do this. I think I would do something like this:

Source https://stackoverflow.com/questions/66906199

QUESTION

Problem writing to LCD screen with Raspberry Pi and BCM2835 libraries

Asked 2020-Nov-26 at 22:30

I'm attempting to write to an LCD (LCD1602 Display Screen) using a PCF8574 IO Expansion Board. I've used some example code I found, but although it does flash the background light (so I know it is communicating with the LCD) it doesn't print numbers.

I don't want to use the WiringPI library because it is no longer supported and I want to use the BCM2835 libraries. Anyone know how I can write characters to the LCD? I thought I only needed to send the ascii codes?

...

ANSWER

Answered 2020-Nov-26 at 22:30

Rather than doing all the work directly through bcm2835 I discovered a library for speaking to an lcd screen via i2c.

https://github.com/albertherd/LCD1602

If you did want to do this solely through bcm2835 then it looks like you just need to do some file IO operations for the I2C controller on the PI. (easier to use the library)

Source https://stackoverflow.com/questions/64978311

Community Discussions, Code Snippets contain sources that include Stack Exchange Network

Vulnerabilities

No vulnerabilities reported

Install PCF8574

You can download it from GitHub.

Support

For any new features, suggestions and bugs create an issue on GitHub. If you have any questions check and ask questions on community page Stack Overflow .

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