- Schematic_ESP_Dongle_2025-08-09.png (104.26 KiB) Viewed 66 times
I’ve been working on a custom ESP32-C3 development board that’s designed to be a plug-and-play ESP-NOW receiver, with the option to log data straight to a microSD card. The idea is to make something you can plug directly into a USB port and have it start receiving packets instantly, or power it from a power bank in the field and store everything locally without needing a computer. The board uses the ESP32-C3’s native USB support, so there’s no separate UART chip, and it includes a built-in USB-A connector, microSD slot in SPI mode, reset and boot buttons for easy flashing, a status LED, and plenty of testpoints for USB lines, UART, I²C, GPIO, and power rails. It’s meant to be simple to deploy but flexible enough for debugging and expansion.
My plan is to use it as a compact receiver for field sensors, quick lab tests, or as a low-cost “black box” for ESP-NOW packet collection. I’m looking for feedback on potential hardware or firmware pitfalls, as well as ideas for features that might make it more versatile.