This project allows you to control and monitor Pylontech US2000B batteries via console port over WiFi. It it's a great starting point to integrate battery with your home automation.
I ACCEPT NO RESPONSIBILTY FOR ANY DAMAGE CAUSED, PROCEED AT YOUR OWN RISK
- Low cost (around 20$ in total).
- Adds WiFi capability to your Pylontech US2000B battery.
- Device exposes web interface that allows to:
- send console commands and read response over WiFi (no PC needed)
- battery information can be retrevied also in JSON format for easy parsing
- MQTT support:
- device pushes basic battery data like SOC, temperature, state, etc to selected MQTT server
- Easy to modify code using Arduino IDE and flash new firmware over WiFi (no need to disconnect from the battery).
See the project in action on Youtube:
- Wemos D1 mini microcontroller.
- SparkFun MAX3232 Transceiver.
- Cable with RJ10 connector (some RJ10 cables have only two wires, make sure to buy one that has all four wires present).
- Capacitors C1: 10uF, C2: 0.1uF (this is not strictly required, but recommended as Wemos D1 can have large current spikes).
- Get Wemos D1 mini
- Install arduino IDE and ESP8266 libraries as described here
- Open PylontechMonitoring.ino in arduino IDE
- Make sure to copy content of libraries subdirectory to libraries of your Arduino IDE.
- Specify your WiFi login and password at the top of the file (line 13-14)
- If you want MQTT support, uncomment line 17 and fill details in lines 21-24
- Upload project to your device
- Connect Wemos D1 mini to the MAX3232 transreceiver
- Connect transreceiver to RJ10 as descibed in the schematics (all three lines need to be connected)
- Connect RJ10 to the serial port of the Pylontech US2000 battery. If you have multiple batteries - connect to the master one.
- Connect Wemos D1 to the power via USB
- Find what IP address was assigned to your Wemos by your router and open it in the web-browser
- You should be able now to connunicate with the battery via WiFi