# Electric pulse counter on msp430 + cc2541 BLE module Counter of circuit close events on GPIO pins, using TI MSP430 microcontroller (on the LaunchPad MSP430G2) and TI CC2541 Bluetooth Low Energy (Bluetooth Smart) module with Emmoco firmware, based on Emmoco example code. `msp430` directory contains microcontroller code for the sensor. Connect the wires from the water meters to the ground pin and pins P1.4 and P1.5 for cold and hot meters respectively. Internal pullup is used. To save power, modify the code to disable internal pullup, and use external pullup resistor of 5 - 10 MOhm. And probably disable VCLK in sleep mode. `linux` directory contains the code to be run on Linux host. It uses BlueZ infrastructure. You will need a BT 4.0 compatible hardware connected to the host.