I am creating a set of 50+ remote imu sensors. They will all be in a small distance from one another. Less that 3 meters. Each remote board will have a on board sd card for logging the imu data and a led that flashes when the imu begins its sampling. My remote board needs to be small, around 25mmX25mm all up. But the smaller the better!!!
The problem is that i cant figure out a reliable solution to send sync wireless from one master unit to these remote imu sensors. These sensors all need to be in sync so the data logged is valid and usable. The sync pulse will be between 24Hz and 120Hz and generated from an external source.
I have been looking into BLE because of the very small modules available with build in antennas and that i can talk directly to the imu. But i can only have up to 8 slaves connected to a master. I could use the broadcasting features and broadcast message to all modules that are listening, but im just not sure.