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README.md

This project is currently on hold while I wait for my Tracer to be repaired. I only had it 1 day, managed to get this sketch written, then when I was packing down, the terminal block broke and left an exposed ground wire stuck in it! So annoying... so I will pick this up in about a month.

Tracer-RS485-Modbus-Blynk

An arduino sketch to connect the EPSolar/EPEver Tracer A/B Series (RS-485 Modbus) to an ESP8266 and monitor using the Blynk mobile app.

Feel free to make pull requests if you wish to help develop it.

There is also a support forum on the Blynk community forums: http://community.blynk.cc/t/epsolar-tracer-2210a-charge-controller-blynk-epic-solar-monitor/10596

Hardware

Software

Wiring

Cut open your ethernet cable and split out pin 3,5,7 (B,A,GND). Refer to Tracer Modbus PDF for additional info.

Follow the wiring guide below: (note that the 2-pol switch is only needed during flashing) Tracer Wiring Diagram

Setup

Libraries

  • Blynk Library
  • ArduinoOTA
  • SimpleTimer

Tutorial

  • Create wifi_credentials.h library.

Firstly, create a folder in your sketch/library folder call 'wifi_credentials'. Then create a new file call wifi_credentials.h and enter the following template. Change the details for your own wifi network.

You will be able to use this file by including it in any sketch by entering #include <wifi_credentials.h>.

/**************************************************************
 *           Settings - Wifi Credentials
 **************************************************************/
#define WIFI_SSID             "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx"
#define WIFI_PASS             "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx"
  • Open the Blynk mobile app and create a new project by scanning the following QR code

Project QR Code

  • Send yourself the generated auth code
  • Paste your auth code in to the settings.h file
#define AUTH                  "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx"
  • Disconnect the TX/RX cables (or open the switch if you have one)
  • Upload the sketch to your ESP8266
  • Once uploaded, reconnect the TX/RX cables and plug the cable in to the Tracer COM port
  • Load the Blynk project and hit the PLAY button to start receiving data

Reference

Tracer A/B Series Modbus Protocol

Developing further

I plan to add more features and pull more data from the controller once I have my own solar system running.

If you'd like to pick this up and have a go at adding features, I'll be happy to accept pull requests.

Credits

Thanks to subtafuge on Reddit for lending me his working Tracer RS485 code!

About

An arduino sketch to connect the EPSolar/EPEver Tracer A/B Series (RS-485 Modbus) to an ESP8266 and monitor using the Blynk mobile app.

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