With which radio protocol does the ESP wake up and get to work the fastest? WiFi, BLE, Bluetooth?
Two radio-linked devices: Device A is a tiny hand-held cube with a single user knob. It sleeps for months on a Coin-Cell. Device B, on a wall adapter, drives a stepper motor that matches Device A's knob rotation angle.
With Device A in deep sleep, user twists knob resulting in a stepper move in <30ms.
Requirement 2 :
With Device A awake and in active use, User will rotate the knob wildly, which the stepper must consistently track with latency <20ms.
Assuming my physics, hardware and software designs are best practice, which radio protocol offers the best fit for the above real-time application?