Sweeping effectiveness measurement

TL;DR

Project to transform a curling broom into a measurement tool to evaluate effectiveness during sweeping in curling. An ESP32 measures the pressure exerted on two cells and an accelerometer measures the frequency of movement. The data is transmitted via BLE to a Bluetooth Web-enabled computer or smartphone.

Intro

Have you ever wondered how effective your sweeping is during a curling match? I have occasionally wondered that myself, particularly compared to the movement made by other players in the club.

Curling stopwatch DIY

This is my second version of the curling training stopwatch. The major improvements in comparison to the older version are: better power management, stable software and new control function.

The new system has two photocells, where the master of the system is the stop one. The start photocell is a slave, like the other module. There are two ways to show the information from the system: first one with a smartphone connected via Bluetooth to the Stop photocell. The second one is a dedicated slave module (like the Start photocell) where the communication between modules is made with a nRF24l01 (I use the version with pa+lna). In my redesign I only updated the software of my old display module but I didn’t do any other change because I chose to develop a better Android app to show the information.