PCF8574_8Relay

PCF8574_8Relay copied to clipboard

My ON and OFF are switched, which line of the code can I flip to change the ON and OFF state?

crustylarry

Use opto-isolation

1

The relay board has opto-isolation, so ideally it should be used to prevent damaging the ESP. Take a look at https://forum.arduino.cc/index.php?topic=185234.msg2651260#msg2651260 I've used relay boards before, but with Raspberry. I...

Misiu

The link to the wifi manager has changed. It should be: https://github.com/tzapu/WiFiManager The old link does not work, but after changing platformio.ini with the new link it compiles.

dherkes

Hello, Thank you for the awesome library, it worked fine with PCF8574, However, I am willing to use it without PCF8574. I want nodemcu's d1 to d7 pins to be...

Daanishh

xtensa-lx106-elf-gcc: error while compiling this code.

5

I am using arduino IDE to code nodemcu / esp8266. while compiling the code I am getting the following error, xtensa-lx106-elf-gcc: error: libraries\DDUpdateUploadServer-master\DDUpdateUploadServer-master.a: No such file or directory I have...

Daanishh

Use ESP8266 with 4 Channel Relay without PCF8574

2

Hi Deb This is exactly what I was looking for. Thanks . I want to use the code with 4 channel relay without the PCF7574. I was using ESP8266 with...

abhishekakt1