Before you can start WebHMI for the first time, you need to take some preparatory steps.

1. Insert an SD card. A memory card is not included in WebHMI shipment package and its selection we leave for users. Recommended size - from 512 MB. SLC type cards much more reliable.
2. By default, the WebHMI IP address of the LAN interface is 192.168.1.1. If you plan to connect to a local network, you need to make sure that there are no devices with the address 192.168.1.1 in this network, otherwise there will be a conflict of addresses. The same applies when several WebHMI devices with factory settings are connected to the local network. All devices will have the same IP address and the network will not work correctly.
3. When connecting the RS485 bus, make sure that not only lines A and B are connected but also their common wire that equalizes the potentials between the WebHMI and other devices on the bus. This is especially true if the line is long or the devices are powered by different power sources.
4. If you do not have WiFi on your computer, you must connect the WebHMI to your computer or network using an Ethernet cable through the LAN interface. Only this interface allows incoming connections. Note that WebHMI on this interface has a DHCP server enabled by default. There may be conflicts with other DHCP servers on the local network.

After completing these steps, you can power-up WebHMI.

During the boot process, the system will check the SD card and automatically format it if necessary.

If the SD card is not detected, the WebHMI will flash three Error, WWW, and VPN LEDs. After 20 flashes, the system boots but not all services are started. During the next minute, watchhog will see that there is no SD card and will reboot the system. In this way, the system will constantly reboot until an SD card is inserted.