BIGTREETECH Pi2 - 5 System Configuration; Using Ethernet; Setting up Wifi; Configuring Overlays

BIGTREETECH Pi 2 User Manual
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5. System Configuration
5.1. Using Ethernet
Ethernet is plug-and-play and requires no additional setup.
5.2. Setting Up WiFi
After the system image has been written, the MicroSD card will have a FAT32
partition recognized by the computer. In this partition, there is a "system.cfg"
file. Open it and replace "Your SSID" with your actual WiFi name and "Your
Password" with the actual password.
5.3. Configuring Overlays
Open the "armbianEnv.txt" file in the BOOT partition and set the values for
overlays. The configuration file supports only one line of overlays at a time; if
multiple overlays are enabled, only the last line will take effect. If you need
multiple overlays, place the contents of multiple configurations on the same
line separated by a space. For example, if you need to use a DSI screen,
MCP2515 SPI to CAN module, and I2C1 simultaneously:
overlays=dsi mcp2515 i2c1