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I'm trying to interface 4x4 keypad with pcf8575, I'm having trouble with pins and also with code. Can anyone assist me. Thanks.
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**Describe the bug**
After flashing the reTerminal with a different RPi OS other than the factory OS, LEDs and Buzzer do not work anymore.
**To Reproduce**
Steps to reproduce the behavior:
1. Fl…
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I am using PCF8574AN with ESP8266(NodeMCU-12E), 8574 SDA is connected to D1(GPIO5), SCLK
to D2(GPIO4) & INT to D6(GPIO12). Attached an Interrupt handler to D6.
Whenever i connect any of the Port p…
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Hi
I have problem with my robot, not working **Expander PCF8574** with my Led RGB. Before not working also simply LED, but i change code on Expander PCF8575 and back on the PCF8574 and work, magic. …
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### The problem
A similar issue was present a long time ago, and has been fixed. Now it is the opposite way. Any output which is not inverted in the beginning of boot will go on for short time.
Fo…
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Wokwi is a simulator. The idea is that we could be able to simulate a v7 board, including it's main two chips:
- PCA9535 , I2C 16 bit IO expander, manages eink slow signals
- TPS65185, also talks …
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My understanding is that it is correct to call ButtonProcess from a timer. If this is the case, would it be correct for the (non-array) members of the Debouncer struct to be volatile?
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### The problem
I have two different i2c GPIO expanders (MCP23017 and PCF8575) that are behaving in the same manner. I have also tried with multiple esp32 boards (Olimex POE using wired ethernet a…
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I would suggest adding an I2C I/O expander to the card to allow more flexibility and resolve the limitations when using an SD card etc. An example here from TI.
[TCA9555 16bit I2C I/O expander](htt…
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While analyzing why the following tests in [tests/periph_i2c/tests/04__periph_i2c_flags](https://github.com/RIOT-OS/RobotFW-tests/blob/master/tests/periph_i2c/tests/04__periph_i2c_flags.robot) fail fo…