RS-485 MODBUS Serial Communication using Arduino UNO as Slave

[@step_freeskills101]

Nice video. I have a question, can you demonstrate the reading as well?

[@makifbuz]

Perfect explanation and documentation thank you so much.

[@Circuitdigest]

Glad it was helpful!

[@muhammadtriza3251]

hallo, your video is usefull but i have a problem. i want to send data from slave (arduino) to master. but i don't know that syntax. can you help me?

[@gibsaka31]

Hello , i have problem when sending data . I press Send button but i do not receive any response in the Response tab , so i am not sending any data . Any idea ? I checked pin connections ..

[@Circuitdigest]

Make sure you have selected the correct COM port and set the COM port settings as mentioned in the post.

[@SumeClue]

Can i read data in a Elevator system's MODbus or Canbus so that i can find out the floor number shown in the display using arduino? Please help

[@sarita1667]

Can I use this program with arduino nano or not. Because When I use this program with my arduino nano then it won't work. So please tell me solution to how I do that.

[@electronic7979]

Useful video 👍

[@qzorn4440]

excellent Simply Modbus description video: i think this example translates " 01 10 00 00 00 03 06 00 01 00 00 00 6A DB 37" to >>> DeviceID; FunctionOpcode; StartAdress; Count; CrcLow; CrcHigh this RTU: 01 = slaveID, 10 = FC, 00 00 = HiLowStartAddress, 00 03 = NumOfRegisters, 06 = ByCount?, 00 01 = L1on, 00 00 = L2off, 00 B4 = 180motor, DB = CrcL, 37 = CrcH

[@MuhammadSohaib-v7w]

Hello bro i want the Communication of arduino with fatek plc, having arduino as slave, do you have any idea, if any then please make a video on it or give me the necessary information here. Thanks in advance

[@ushadussa]

if we use RE/DE pins individual node.begin(1,1,?); ?

[@tanmeowsoon5252]

Hi sir i want to download your Arduino software how to i do it , Many Thanks, Tan Meow Soon

[@sahalasolusiindustri]

i can't send data from arduino from serial monitor to change SV for Slave address 2. Can you help me, how do i solve it?

[@irfaneindb5047]

hello sir, if i want to use tx / rx from softwareserial, is it possible?

[@targetsathees1644]

Please do video without using modbus software. Do it same communication with any real devices like temperature controller. How to get values and how to read valves in arduino

[@uditkumar5854]

I'm not receiving Response what should I do

[@preetsoni2176]

Simply modbus write doesn't work when I press send button..plz help

[@Circuitdigest]

Please write your queries on our Forum to get them answered fast circuitdigest.com/forums

[@sonateresa]

did you find the solution?? please help

[@blinkelectricsltd1272]

please share the library

[@txonso1194]

Hello, its posible use softwareserial with modbusrtu library i want to use serialprint, can u help me?

[@Circuitdigest]

please post your question on our forums circuitdigest.com/forums. I am sure someone there will be able to help you with this

[@txonso1194]

@@Circuitdigest thx so much

[@uditkumar5854]

Sir I'm unable to send data what should I do

[@Circuitdigest]

You can try posting your problem in detail on our forums. circuitdigest.com/forums The author will respond to you there

[@sonateresa]

do you know the solution?? please help

[@gibsaka31]

@@sonateresa check if RE and DE pins are connected together .

[@BabluRana-fn3ub]

Your explanation is good but not working for me. I am checking everything like com port,bread board connection etc but nothing happened. Please suggest...

[@Circuitdigest]

Without knowing what the exact issue is how can we help you?

[@BabluRana-fn3ub]

@@Circuitdigest i am not using lcd screen and servo and code is exactly same but when i will sending 1 from simply modbus master software nothing happened. No response from led neither pin no2 or pin no 5.

[@BabluRana-fn3ub]

@@Circuitdigest pls reply

[@Circuitdigest]

Are you sure you are sending the whole data frame correctly?

[@BabluRana-fn3ub]

@@Circuitdigest yes, i am not only seeing your video. But also going to website and follow step by step. I am suspected that my rs 485 to usb converter not working (but sensing com port 9 in computer). Is it a possiable reason what do you think??

[@thinkingindian3308]

Very well done. Excellent job.

[@ravikumarbiradar1115]

Thanks brother