... try search a solution like this in ESP8266 repository. Moreover you should test the NodeMCU alone just connected to USB to make sure this is not a wiring error. Best regards.

... repository. Otherwise you should buy another NodeMCU. Moreover you should test the NodeMCU alone just connected to USB to make sure this is not a wiring error.

... because I designed the card for the other PCF8575 model. The wiring is exactly the one indicated by you but without connecting the vdd and the gnd to the side of the board. Best regards

... Last edited Thu May 16, 2019 12:49 am -------------------------------- Sorry Never mind the last question i have solved it it was wrong wiring from the probe

... buy a separated RTC module and connect to the board after remove jumpers. -------------------------------- ... To avoid problems with relay board wiring I recommend buy my relay board . It's expensive but ...

... make the relays work. The leds are barely visible when turned on. The wiring is like the one you indicated with 10k resistances between sda/5v ... would like to use the latter pcf8575 because I have already printed the board Thanks

Hi!

I don't know the driver used in your LED light fixture so I can't tell you how to make the wiring.

The multiplexer for I2C BUS is not needed.

Please give enough information if do you want some help here.

Best regards.

Hi!

What's the reason to use a relay board for dosing pumps if an ULN2803 is more cheap and very small? Moreover the wiring is very simple.

Please show me the model of your relay board and pictures of your wiring.

Best regards.

Hi!

As I told here 5V pin in this relay board is an output.

Check the wiring on video.

Best regards.

... and powered on the same line as the PCF and works correctly. Finally I designed a complete plate instead of the different modules to simplify the wiring. I think there may be a problem in the PCF itself and this very afternoon I will replace it to make sure. I was asking if I found any errors ...

Hi!

Just for test connect the module to pins 20 and 21 then use the test code i2c scan to see if the controller can find the module.

The address should be 0x68.

If can't find the module can be bad or the wiring is wrong.

Best regards.

... from web interface . [BBvideo 560,340:3jw5yoan]https://youtu.be/F57SC1WOODg?t=16m28s[/BBvideo:3jw5yoan] Problem with sync normally is related to wiring and baud rate. Actually the code is configured to work with 9600. You should set this value in uC Console in ESP-link interface. https://github.com/FernandoGarcia/Ferduino_with_webcontrol_beta/blob/master/Nodemcu/Example/mqtt/mqtt.ino#L118

The wiring seems wrong to me.

Check the pin map again: http://ferduino.com/wp-content/uploads/ ... PinMap.pdf

Also try first with test code for PCF8575 available on forum.

... see. Just for my understanding, if we could use the isolated carrier board from Atlas, which could be the wiring? in that case the multiplexer should not be removed from ferduino, right?

... where's the problem. I also have problems with relays-1. When I connect it to the board the LEDs of the relay that should control the pumps ... You should try it first with test code to see if the wiring is alright. This module has inverted logic (I mean ...

Hi! What you are talking doesn't makes sense to me since leaving the trimmer connected between 2.5 V and GND it will work like a simple resistor spending energy only. Maybe the controller doesn't supports PWM control so the alternative is add a ceramic capacitor of 1 uF between PWM pin and GND. Best...

Hi Fernando and guys, I tried your suggestions with another Arduino that I have. It works but with a little modification. I think that it is because the pump with the trimmer can not be regulated between 0 and 100% of power...but between 20% and 100%. So removing totally the trimmer the pump control...

Ok Fernando, I’ll try following your suggestions and I let you know.

Thank you

... DO NOT APPLY more than 127 PWM to this input or use a voltage divider on PWM pin. P.S.: I'm not responsible by any damage in your controller or board. Do it by your own risk. -------------------------------- Last edited Sun Nov 05, 2017 4:02 pm -------------------------------- My suggestion ...

No! It doesn’t change. 2.42 V stable.