ESP32 Forum

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This is my design of a simple ESP32-S3-MINI USB and BLE HID device. If I connect it to the PC it is only momentarily recognized and then disappears to show up again one second later. It is on and off constantly. What could be the possible issue? The rest you don't see is just some buttons. This is the serial monitor. Please help . Rgds

[Codebox]invalid header: 0xa5ff005a
invalid header: 0xa5ff005a
invalid header: 0xa5ff005a
invalid header: 0xa5ff005a
invalid header: 0xa5ff005a
invalid header:
ESP-ROM:esp32s3-20210327
Build:Mar 27 2021
rst:0x15 (USB_UART_CHIP_RESET), boot:0x8 (SPI_FAST_FLASH_BOOT)
Saved PC:0x40048839
invalid header: 0xa5ff005a
invalid header: 0xa5ff005a
invalid header: 0xa5ff005a
invalid header: 0xa5ff005a
invalid header: 0xa5ff005a
invalid header: 0xa5ff005a
.....[/Codebox]

One issue at least is your LDO: An XC6206 can only deliver up to 200mA, the ESP32S3 needs at least 500mA to fully function correctly. You're also lacking a proper power-on-reset circuit: you need an extra 1uF or so cap from EN to ground to fix that.

Aside from that, the behaviour you see is to be expected for an empty ESP32-S3. To fix it, you can either start programming the ESP when it does show up on your PC (it'll stay active then) or boot it into download mode by making GPIO0 low while resetting the chip.

thank you!