I try to change the pin 2 by another but my lcd doesn't works.
I don't know if it's possible to change the assignment for the pin lcd.
To put in place the lcd I have used a tutorial. I have a look on google but a lot of tutorials have the same pin assignment.

Oups!

Unfortunatly, my LCD allready use the PIN 2 of the arduino.
As I need to connect my NRF24L01+ on my Arduino mega, I need to use the PIN 2 also for the RF.

Do you know if it's possible to map the LCD on other PIN?
For the moment, it's map like this:

LiquidCrystal lcd(12, 11, 5, 4, 3, 2);

Thank you for your help

Jerome

I have a look at https://www.openhardware.io/view/381/Floating-Swimming-Pool-Sensor-Water-Quality

In fact, in my arduino code, I take the average value of the ph and the redox to keep stability of the values. I record it into 2 variables:

• float pH
• int Redox

So I have to use the "var1_msg( 0 , V_VAR1 )," to send my variables as I can see in the "sensor water quality" project.

I will try this

thanks @mfalkvidd I will have a look at this.

Hello,
In first time, sorry but my english is not very good.

I will explain my project:

I put in place a pool regulation with an arduino Mega and an LCD screen.

• pH value of the water pool
• Redox value
• temperature of the water
• pump to inject Chlore for the redox
• pump to inject acid for the pH

My system works as I want.

My next step is:

• Send the pH value to domoticz ( between 6.8 and 8.0 ) (float)
• Send the Redox value to domoticz ( between 400 and 1000 ) (int)
• send the temperature value

I would like to be able to control the light and the heat pump of the pool throught domoticz.

I allready have some mysensors nodes at home ( light level, temperature and motion sensors ) wiches are working perfectly.

I don't know how to send the pH and the Redox values
It will be kind of you if someone could help me.

Best regards

Jerome
Belgium