Modbus RTU (RS485) Instructions

Hardware
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1

Let me start by saying I am not an expert but I have SOME experience with (and have working sketches) for:

  1. Arduino + Serial Modbus RTU (Over RS485) + MAX485 Module + PZEM-016 Energy meter (Latest model works with RS485 Modbus RTU).

  2. Arduino + Serial TTL + PZEM-004 + EmonCMS API Posting to EmonCMS.org.

What I would like to accomplish as soon as possible is to combine Nr.1 + EmonCMS API Posting to EmonCMS.org or more preferably API Posting to Local EmonCMS server.

To read the information from a RS485 device was not hard at all and you would just need some information to start with.

I will post the instructions soon as I can see people are eager to read their ebay bought RS485 energy meters and should also work with 3 phase energy meters, inverters, charge controllers, almost anything working on the RS485 Modbus RTU Protocol given you have the required information to start with.

2

Can you post the arduino code you have used with pzem016? I have received one of this and want to use with esp8266

3

Hello Helianto,

You might find this thread helpful:

4

Hi 24sevenguy,

Can you share the code you used to read data from PZEM-016 energy meter using arduino.I already posted similar link in this forum but didnt got satisfactory replies.

link to my post please refer and help me out
https://community.openenergymonitor.org/t/reading-data-from-energy-meter-through-modbus-protocol/12585