Before flashing ensure the device is unplugged from the charge controller.
To flash connect the ESP device to your computer using a USB cable
Hit “Install” and select the correct port.
Once installed it, will create a WiFi access point called “RS485-Wifi”. From there you can follow the Getting Started instructions. If web flashing fails please use the manual flash guide.
NOTE: Make sure to close anything using your devices com port (e.g. Serial monitor)