Solar · Battery · Load
Energy monitor
Preview mode · These are sample readings. Your monitor is not connected.
Ready when you are
Connect your energy monitor
Power it on and keep it nearby. Your phone can stay on its usual Wi-Fi.
Choose S9-Energy and enter its Bluetooth PIN if asked. Starts as 123456. No account needed.
Already connected to home Wi-Fi?
Use the same home network as the monitor. Connect nearby first if you don’t know its address.
Ready when you are
Connect your energy monitor
Join your ESP32’s S9-Energy Wi-Fi, then open http://192.168.4.1 in your browser.
Solar Power
Positive current follows IN+ to IN−.
Power
—W
Waiting for reading
Voltage
—V
Voltage at this connection
Current
—A
— mA
Net energy
—Wh
Since the last reset
Live trend
Collecting readings. The graph updates every 10 seconds.
Updated every 10 seconds · gaps mean no reading
History is kept on your monitor for up to an hour and clears when it restarts.
Energy totals
INA226Forward—Wh
— mAh
Reverse—Wh
— mAh
Measured time—
Totals keep running when you close this app. Saved every 5 minutes.
Each sensor measures one circuit point. Solar, battery and load totals stay separate to avoid counting energy twice. Watt-hours (Wh) show how much energy was produced or used.
