EFR32FG1 Flex Gecko 2.4 GHz and 169 MHz Radio Board


The Flex Gecko SLWRB4251D 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 SLWRB4251D radio board supports dual-band operation with sub-GHz operation in the US FCC 169 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 +19.5 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
SLWRB4251D EFR32FG1P133F256GM48 256 32 Yes
169 MHz
+20 $49 169 MHz EFR32FG SLWRB4251D Dual Band Radio Board
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