3 PT100 sensor monitoring on i2c oled

Projects General Guidance
1

Hi.
I want to make solar water heater controller with:
3 PT100 RTD sensor (2 wire)
3 Max31865
1 128x64 i2C oled screen
2 5v relais (Out signal for circulation pump, and slave pump)

Ok..
Sensors i want to named T1, T2, T3 also want to see on display as T1,T2,T3
Relays : RL1, RL2
T1 sensor add son collector
T2 sensor add water boiler tank (actualy main tank)
T3 sensor other heat source (fire place tank)

Target is; heating boiler tank.
Algoritma is so:

Max31865's CS pins
T1 : 6
T2: 9
T3: 10

RL1 : 4
RL2 : 5

If (T1<=95 C) && (T1-T2>=5) && (T2 <=90) = RL1 high (on)
else RL1 (pin 4) low (off)

If (T3-T2<=5) RL2 (pin 5) high (on)
else RL2 low (off)

And I want to monitoring on display:
T1,T2,T3
RL1 situation see on display RL1 ON or OFF
RL2 situation see on display RL2 ON or OFF

Please how to ide codes?? Temp values in Celcius--Here is europa, we not using Fahreneit.

I realy need help.
Thanks great for helping..

2

This is a DIY helper forum. Not a code on demand forum...
So, you really need to do some attempt at coding...
...no matter how wrong your code: people will help...
Take one step at a time. Read the pt100. Print the value to serial. Then add conversion to farenheit. Then put things in an array that holds 3 pt100's.