Q: My 2A doesn't respond when plugged in, no indicator light, and no serial port when plugged into a computer.(

In the earliest batch of 2A, due to possible problems with the fixing device, if subjected to forceful and violent impacts, it may lead to pcb displacement, the impact of this range is very small, because after that, we have adopted the method of glue fixing, as well as the latest is the new printing of the bottom case reinforcement, but still may be a very small number of the existence of (affected by the range of maybe 20-30 2A radar). One of the biggest impacts is that if the ESP32 motherboard is shifted too much, it can cause the TYPE-C socket to come loose and not be powered.

We recorded a video to describe how to perform the reset pcb operation manually. Please note that this is very rare and only attempted when necessary (e.g. no power, or a rattling noise when gently shaking the box.).

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What are the wiring specifications for the LD2450 module? How should I buy it?