@@CowenTan-h6i Thanksfor sharing the video to reach wider community 👍

/* This code demonstrates how to interact with an Arduino Mega 2560 and a Modbus RTU temperature and humidity sensor (SHT20). It reads the temperature and humidity values every 1 seconds and display data to the serial monitor. Note: Serial Port 0 is not used to connect the RS485 Converter (MAX485) because its used for debugging. The Serial Port 1 (TX1, RX1) is used for ModBus communication interface. Wiring of Sensor, Arduino, and MAX485 TTL to RS485 Converter: ___________________________________________________________________________________________ | Sensor (SHT20) | MAX485 TTL to RS485 Converter | A (Yellow) | A (Terminal block) | B (White) | B (Terminal block) | GND (Black) | GND (External Supply) | Vs (Red) | 9-30V (External Supply) ___________________________________________________________________________________________ | MAX485 TTL to RS485 Converter | Arduino (Hardware Serial) | Arduino (Software Serial) | RO (Reciever Output) | D19 (RX1) | D9 (RX) | RE (Reciever Enable) | D2 | D2 | DE (Driver Enable) | D3 | D3 | DI (Driver Input) | D18 (TX1) | D10 (TX) ___________________________________________________________________________________________ */ #include <ModbusMaster.h> #include <SoftwareSerial.h> #define MAX485_RE_NEG 2 #define MAX485_DE 3 #define SSERIAL_RX_PIN 10 #define SSERIAL_TX_PIN 11 SoftwareSerial RS485Serial(SSERIAL_RX_PIN, SSERIAL_TX_PIN); ModbusMaster node; void preTransmission() { digitalWrite(MAX485_RE_NEG, 1); digitalWrite(MAX485_DE, 1); } void postTransmission() { digitalWrite(MAX485_RE_NEG, 0); digitalWrite(MAX485_DE, 0); } void setup() { // Initialize control pins pinMode(MAX485_RE_NEG, OUTPUT); pinMode(MAX485_DE, OUTPUT); digitalWrite(MAX485_RE_NEG, 0); digitalWrite(MAX485_DE, 0); // Modbus communication runs at 9600 baud Serial.begin(9600); RS485Serial.begin(9600); // Modbus slave ID 1 node.begin(1, RS485Serial); // Callbacks allow us to configure the RS485 transceiver correctly node.preTransmission(preTransmission); node.postTransmission(postTransmission); } void loop() { // Request 2 registers starting at 0x0001 uint8_t result =node.readInputRegisters(0x0000, 2); //x0000 is the initial address Serial.println("Data Requested"); if (result == node.ku8MBSuccess) { // Get response data from sensor Serial.print("Temperature: "); Serial.print(float(node.getResponseBuffer(0x01) / 10.00F)); Serial.print(" Humidity: "); Serial.println(float(node.getResponseBuffer(0x02) / 10.00F)); } delay(1000); }

please correct if i'm wrong... thanks

Thank you, Raymond! This piece of work will be applied for atmospheric pressure plasma jet. Wrap up warm for autumn :)

Thank you sir. Just an afternoon hobby try out :). Have a nice day too.

Thanks for watching! I have designed some nice pcbs in easyEDA and fabricated in JLCPCB in China. I don't need to own a PCB lab to make a professional looking PCB! Most important of all, it cost less for prototyping small quantity of boards.

@@fionasoon1 Yes JLCPCB are great. I received 200 of my charger boards for MY NICE EV yesterday. All for $68 or £64 to me here in the UK. Panelised 2 per 100mm x 100mm panel. I am looking forward to seeing more of your work. I hope you have an amazing day. Regards. Raymond.

The codes given is for the serial xbee transmitter and there is code for the receiver. The received serial signal from receiver xbee will be decoded and displayed by xctu. Do have a look at other youtube video for configuration for xctu to work with xbee receiver.

Error :There is no code for the receiver xbee

Thank you very much for your encouragement for a newbie like me. We prepare these videos for our postgraduate students to understand the operation of our machines.

@@fionasoon1 It looks to me that you are very proffesional and your videoing is great. Very well done. Keep doing what your doing. I will keep watching your videos. Have a wonderful day.

Yes, sir. Thanks.

Hi. The Raman spectroscope must be calibrated before use. This is to ensure that the machine is in good working condition. Or else, the results of other measurements obtained can be questionable.

@@fionasoon1 Ah. Yes I see now. At 69 brain not what it used to be lol. Thank you for taking the time to explain. You are awesome. Have a graet day.

Hahaha....safety first!

You need to install the correct library. The libraries are here. github.com/adafruit/Adafruit-ST7735-Library

@@fionasoon1 sir, thank you can you tell me the connections of 1.8 TFT Display and DHT11 sensor and Arduino Mega 2560 once again

@@devi-uu3ts The connections are all indicated in the sketch! Make sure you understand the codes for the I/O (input/output) pins. Fiona Soon 1 year ago The codes are here:- ////////////////////////////////////////////// // 2.4" TOUCH SCREEN DEMO // //with DHT11 TEMPEARATURE AND HUMIDITY SENSOR// // modified from mwww.educ8s.tv // ///////////////////////////////////////////// /*this program works fine with arduino atmega and calbirate using Serial.print DHT11 temeperature and humidity sensor are added*/ #include <Adafruit_GFX.h> // Core graphics library #include <Adafruit_TFTLCD.h> // Hardware-specific library #include <TouchScreen.h> #include <SD.h> #include <SPI.h> #include <DHT.h> #define DHTPIN 7 // what pin the sensor is connected to D7 #define DHTTYPE DHT11 // Which type of DHT sensor you're using: //#define DHT_GND 5 // ground pin of the sensor //#define DHT_VCC 8 // voltage pin of the sensor #define TEMPERATURE 1 // for the DHT sensor #define HUMIDITY 0 // for the DHT sensor #define YP A1 // must be an analog pin, use "An" notation! #define XM A2 // must be an analog pin, use "An" notation! #define YM 29 // can be a digital pin 7 for arduino uno #define XP 28 // can be a digital pin 6 for arduino uno #define TS_MINX 170 //150 #define TS_MINY 170 //120 #define TS_MAXX 955 //920 #define TS_MAXY 920 //920 TouchScreen ts = TouchScreen(XP, YP, XM, YM, 300); #define LCD_CS A3 #define LCD_CD A2 #define LCD_WR A1 #define LCD_RD A0 // optional #define LCD_RESET A4

@@fionasoon1 Thank you for replying me sir,as we are not using touch screen but in the code it shows a touch screen so still we can use the same code?

Estoy bien. Gracias. Al adquirir el CNC 2418, se incluye el CD del software.

Need to calibrate the height of the drill from the surface of the acrylic board and zero the ZYZ position in the GBRL control software.

It looks like my version is newer than yours, did you check the "Ignore error responses" checkbox for it to be able to read the lines?

Gbrl control 0.8, Inkscape 0.93. Use the old version of Gbrl control

Wow, I watched your video too. Very inspiring! All parts are in Fiona Soon 's video list. Type Fiona Soon in search box. Then, you will see part one.

Ah yes! I see now. My bad! Very interesting channel, not the usual stuff.