Modbus using ESP8266 NodeMCU 

Thank you. This was really useful and the best modbus guide I have found anywhere. Just a minor tweak would be to make the background music quieter, it was very hard to hear what you were saying, and that information was valuable!

Nice video, thank you.

Hello friend, Could you help me to use this library to configure a NodeMCU as slave and communicate with a PLC by Modbus RTU?

hello sarath tv,thanks for sharing the video,it is very good. I have a question about server: if (!mb.slave()) { while(mb.slave()) { mb.task(); } delay(10); } mb.slave() is a variable that is set to false or true depending on whether it is available to communicate with a slave or not? and if so, what exactly does mb.task() do? is something internal to the library that always has to be executed every time you want to send something. and in the client I do not understand what function "mb.Hreg(POT_VAL_REG, 0);" performs. I understand that 10 records of the holding register type are already defined with "mb.addHreg(POT_VAL_REG);".

hi ! could you help me to send a string using this

Can you share the arduino code for this?

I am getting an error for this code Can you please guide me out

Good video but the music, way too loud makes, it hard to understand what you are saying. Thanks anyway.