tB4 is a compact expansion board designed for use with LK4, LK3.5+ (including LK3.9), and LK3.0 controllers.
It features four RJ12 ports supporting I2C and 1-Wire buses, along with a dedicated connector for a 0.96” OLED display.
Included in the set:
Detailed instructions for configuring sensors and the display are available in the Lan Controller user manual.