This application report describes a low-cost heart-rate monitor solution based on the MSP430 LaunchPad Value Line Development Kit (MSP-EXP430G2), which uses the MSP430G2xx microcontroller (MCU). A daughterboard amplifies and filters the electrocardiogram (EKG) signal before it is sent to the MCU for sampling and processing. The heartbeat-per-minute data is sent to the PC by means of the back-channel UART-over-USB available on the LaunchPad. Additionally, an eZ430 radio frequency (RF) target can be connected to the six-pin header on the daughterboard to transmit data wirelessly via the SimpliciTI network protocol.