tempAndFlowRate

Monitor CO2 laser temperature and flow rate using ESP32

This is a project for my CO2 laser with

1. Monitor temperature using DS18B20
2. Water flow using YFS201
3. ESP32 microcontroller
4. TFT 1.8 inch display

Here is the library used: #include <TFT_eSPI.h> //by bodmer #include <SPI.h> #include <DS18B20.h> #include <FlowSensor.h> //by Hafidh Hidayat

##Display Wiring Display ESP32 VCC --> 5V RESET --> G14 GND --> GND LED --> 3.3V SDA --> G23 SCK --> G18 CS --> G17 A0 --> G2

You will need to modify User_Setup.h. Modified file included here Read more here https://www.az-delivery.de/blogs/azdelivery-blog-fur-arduino-und-raspberry-pi/1-8-toll-tft-am-esp-32-dev-kit-c-betreiben

For temperature and flow rate sensor, I used breakout module. One for both DS18B20 and one for YFS201. See sensor2.jpg

##DS18B20 Wiring DS18B20 ESP32 VCC --> 5V GND --> GND Data --> 13

##YFS201 Wiring YFS201 ESP32 VCC --> 5V GND --> GND Data --> 34

You can modify the temp and flow rate to your wants.

const float MAX_TEMP_IN = 30.0; //In Celcius const float MIN_TEMP_IN = 18.0; //In Celcius

const float MAX_TEMP_OUT = 30.0; //In Celcius const float MIN_TEMP_OUT = 18.0; //In Celcius

const float MIN_FLOW_RATE = 0.5; //In L/min

To change celcius to fahrenheit if fairly easy. Change all ds.getTempC(); to ds.getTempF();

You will get nan flow rate reading if delay < 1000 ms. Set it to atleast 1000 ms delay(1000);