EFR32FG14 Flex Gecko 2.4 GHz and 868 MHz Radio Board


The Flex Gecko SLWRB4257B radio board plugs into the main board provided with the Flex Gecko Starter Kits. The radio board can also be used as a reference design for matching networks of the RF interfaces. The SLWRB4257B radio board supports dual-band operation with Sub-GHz operation in the US FCC 868 MHz band with an external whip antenna, and 2.4 GHz operation at the 2400-2483.5 MHz band with the on-board printed antenna. The matching networks are optimized to +13 dBm output power.

Radio Board User Guide Included Device Flash (kB) RAM (kB) Proprietary 2.4 GHz
Proprietary Sub-GHz
zigbee/Thread BLE Bluetooth 5 Bluetooth Mesh Output Power (dBm) Price (USD) Add to Cart
EFR32FG14P233F256GM48 256 32 Yes
868 MHz
No No
+13 $49 868 MHz EFR32FG SLWRB4257B Dual Band Radio Board
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