Modbus RTU master

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pruwait
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Joined: 18 Nov 2019, 17:14

Modbus RTU master

#1 Post by pruwait » 18 Nov 2019, 17:20

I neeed to connect ESP with some Arduino. I want to use wire and ModbusRTU. Arduino is slave and ESP is master. How can I get it with EspEasy? I see "ESPEasy/src/Modbus_RTU.ino" but I cant understand how can I use it.

TD-er
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Re: Modbus RTU master

#2 Post by TD-er » 18 Nov 2019, 23:19

There are currently 2 plugins using Modbus RTU.
AcuEnergy DC24x
SenseAir (S8/S11)

There is no "generic" plugin for Modbus, so you need to write one yourself.
I think the AcuEnergy is the simplest one to get started with.

pruwait
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Re: Modbus RTU master

#3 Post by pruwait » 19 Nov 2019, 09:00

Thanks for your answer. I will try to understand how working plugins P085, P052, P078 and make new one.

TD-er
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Re: Modbus RTU master

#4 Post by TD-er » 19 Nov 2019, 09:44

P078 is the Eastron plugin and although it uses Modbus RTU, its library we used has still its own implementation (which eventually will be merged into the same)

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