I encountered a perplexing situation when using this module. In standalone mode, I only hear faint clicks when grounding a trigger pin, despite powering the module through my laptop’s USB port. Notably, the power LED is lit. When I switched to Arduino mode and meticulously connected the 3.3v, ground, SCL, and SDA pins to an Arduino Uno, the power LED failed to illuminate and the Uno was unable to detect the module. Given these complications, I wonder if I overlooked a crucial component or step.
What module are you using?