JeeLabs RFM12B Board Kit


SKU: JL021X. Categories: , . Tag: .

Product Description

This board is the perfect way to interface traditional Arduinos (or other microcontrollers) to JeeNodes. While we like our JeeLink modules a lot, as an easy way to get going with wireless, this board is a quick and easy add-on to Arduinos, to leverage your current technology. The RFM12B Board is a compact breakout board for HopeRF’s RFM12B radio module, as featured on all JeeNode and JeeLink boards. If you are looking for an affordable way to add wireless communication to your Arduino (compatible) board, this is the board to get.

The board works with a whole range of Arduino (compatible) boards, such as official Arduino boards (both 5V and 3.3V versions), Freeduino, JeeNode SMD kit, RBBB and Boarduino. For ease of use, the header pins are labeled with signal names as well as Arduino pin numbers. Just plug it into your breadboard and connect it as indicated.

The RFM12B radio module supports a power supply level of up to 3.8V. To be able to use the RFM12B in a 5V context, this board features a voltage regulator circuit and voltage level converters for signal pins, besides pads for the RFM12B module itself. For use with 3.3V, the regulator and level conversion components can be left out.

An antenna must be connected to the module, and piece of wire will work. The length varies by frequency, here’s our cheatsheet for cutting antennas, which includes about .15″for stripping, tinning and soldering.

  • for 434 MHz  6.7 inches
  • for 868 (Europe) 3.5 inches
  • for 915 (Americas & Australia) 3.25 inches

The Kit variant includes everything to make your Arduino (compatible) board wireless, including the parts needed for power and level conversion, the RFM12B radio module (915 or 434 MHz), and an 8-pin header. For 915 Mhz, see the JeeLabs shop. Note that an Arduino board is not included with this kit. We have not experimented with the RFM69C radio modules, however if you would like to please say so in the order comments and we will swap the radio modules out.

The PCB-only version contains just the board. No parts, no headers. When using the RFM12B Board in a 3.3V setting, the regulator and level shifting is not required so you could just use the blank pcb and a RFM12B radio module

The documentation and full design details are freely available, as well as an Arduino library with sample C code.
The RFM12B board’s wiki page.

Additional Information

Weight 7 g
Dimensions 3 x 3.6 x 0.3 in



915 Mhz, 434 Mhz