ESP32 ESP32-C3 Development Board ESP32 C3 Mini WiFi Bluetooth 160MHz Running Frequency 2.4GHz Wi-Fi & Bluetooth 5.0 ESP32 C3 Super Mini for Arduino (5pcs)

Boards work fine but the pinout image in this listing is incorrect. There is no default SDA and SCL, the RX and TX pins are reversed, and pin 8 is the built-in LED.I ported over some older wroom code for receiving BLE packets from Victron equipment and had to make a couple of changes. Notably (with arduino_cli 3.0.0 environment) Wire.h now has to be explicitly included and initialized and you have to specify what the sda and sdl pins are. So for example #include Wire.h and in setup call Wire.begin(10,9) so that 10 is the data line and 9 is the clock. External pull-ups are not required and you can use any gpio pins for this. This is unnecessary for the wroom boards.The LED_BUILTIN is no longer defined so you have to #define LED_BUILTIN 8 to use it. Note that it is inverted, setting it to 1 turns it off and 0 turns it on.I do occasionally have download problems but they’re always cured by using the reset/dl buttons and it happens with all my esp32 boards, not just these ones.I use these within about 20ft of the bluetooth emitter and likewise to the Wifi AP, both interfaces work perfectly well with the ceramic antenna (which I had doubts about).Also I don’t use the header pins that are provided, I use right-angled ones instead so the profile of the board is kept very low for tight spaces. It’s wider of course.

A generic esp-c3 super-mini. Works well. Use nologo super-mini or dfrobot super-mini in arduino. SysLED on gpio8.

Infinite boot loop, cannot load code onto them rendering them useless

Used to build as scrolling text sigh for Vacation Bible School. The kids loved it.

This ESP32-C3 Mini development board is an excellent choice for projects where space is limited but connectivity is crucial. The compact size makes it perfect for wearables, small IoT devices, and other space-constrained applications. The integrated Wi-Fi and Bluetooth 5.0 capabilities provide a reliable connection, and the 160MHz running frequency delivers solid performance. It's a versatile and powerful board that's easy to integrate into a variety of projects. Arduino IDE compatibility makes it simple to code.

this is the second time (yes, my mistake!) buying this type of device from ACEIRMC.This is also the second time i'll be returning thier product as they are CRAP! Three of 5 I opened (inner individually packed) would not accept a program download. three different editor environments and two different test computers and no dice! different suppliers, device works just fine. but not this batch

Works fine once you do some googlingIn Arduino IDE choose "XIAO ESP32C3" as the board.If you're chip appears "dead" and won't upload/program, hold boot and then press rst and then release boot - you should now be able to program it.If it programmed but doesn't appear to run, press boot once and it will start your program.

Tiny little ESP32 - as with most ESPs its super easy to set and get started with your project. Works well connected right away.