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
-
RS485 UART Module (not the MAX485 chip!)
-
An old ethernet cable with RJ45 connector you are happy to cut open
Software
Wiring
Cut open your ethernet cable and split out pin 3,5,7 (B,A,GND). Refer to reference below for additional info.
Follow the wiring guide below: (note that the 2-pol switch is only needed during flashing)
Setup
Libraries
- Blynk Library
- ArduinoOTA
- SimpleTimer
Tutorial
- Open the Blynk mobile app and create a new project by scanning the following QR code
- Send yourself the generated auth code
- Paste your auth code in to the sketch
char auth[] = "xxxxx";- Enter your wifi SSID and PASS
char ssid[] = "xxxxx";
char pass[] = "xxxxx";- 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!