XIAO ESP32C3 3PCS Pack - RISC-V Tiny MCU Board with Wi-Fi and Bluetooth5.0, Battery Charge Supported, Power Efficiency and Rich Interface

Amazing little gadget. This has a well-built-out ecosystem for programming. It will take some reading, but if you do much with VS Code you can get this working pretty well. I have one doing WiFi scans and it works quite well.Note: you may have to do some soldering to use it w/o the USB, and to put connectable pins on it. The pins will work with breadboards. But you will not need a special programming device--just your computer.

I programmed it as a wifi access point and web server to deliver web pages to a web browser running on a tablet, cell phone, laptop or pc. I stored .png images on the esp32c6 using LittleFS that the web page was able to include in its display as an html body background image as well as html img images. I used Arduino IDE version 2.3.6 with C++. I have it defined as an XIAO_ESP32C6 board definition in the Arduino IDE. To get the onboard led to blink on and off, in void setup(), I specified pinMode(LED_BUILTIN,OUTPUT); and later in void loop() I was able to toggle it on and off in void loop() using digitalWrite(LED_BUILTIN,LOW); and digitalWrite(LED_BUILTIN,HIGH); I was also able to use a BME280 temperature sensor to the XIAO_ESP32C6 using pins D4 to SDA and D5 to SCL as well as supplying VIN and GND to the BME280. I will definitely be purchasing more of these XIAO_ESP32C6 microcontrollers.

3 pack of esp32s3. Decent price. I was happy they included antennas. I soldered my own pins to the board. Soldered a 1000mah battery to the terminal. Each had a soil moisture sensor, temperature sensor, and humidity sensor.I have been using the esp32s3 variant for most of my projects due to the most robust support for micropython. With the power of these with cpu with micropython, it takes 30-60 minutes to prototype out the code. ESP now with micropython is very nice and all my sensors utilize it. Sensors all communicate with one master esp32s3 which communicates with an mqtt server. Xiao esp32s3 devices/sensors -> esp now -> master esp32s3 -> mqtt server -> database/triggers

Muy buen producto, y lo mas importante para mi, es que llego muy rapido.

Update 5/1/25:The little flex antenna doesn’t work any better than the ceramic one and the higher gain antennas I have found do not improve bluetooth performance at all. In fact the 8db gain antennas I bought are *extremely* directional to bluetooth signals to the point that they don’t get anything from 10ft away if not aligned very precisely, though they do improve wifi signaling mightily in every orientation I tried.I upgraded the cores when I made a new pi4 build platform but it did not fix one glaring issue with these - the pin numbers in the tooling does not match the silkscreening on the part. For example with pin 2 designated as an output the signal appears on pin 0.Update:The 3.0.0 cores I updated to are dev, not stable. The Serial2 port doesn’t work on any esp32 core unless you explicitly declare a new hardwareserial object, for wroom do the begin call with the pin number parameters provided and those are rx=16 and tx=17 iirc. For c3 and c6 both accept the begin call with only the baud rate parameter iirc.Original:I have some BLE code running on wroom boards and tried converting to the c6 with little success, could be my methodology.I build using arduino-cli on headless Libre ROC boards. I upgraded the cores and added the XIAO ESP32C6 which was quite painful and then made some slight changes to my existing code to accommodate some slight refactoring done in the newer BLE libraries. That code runs fine on the old wroom boards built with the new core updates.Building for the c6 was not much trouble but the code didn’t work at all. I built a simple blink sketch and it did work but the serial.print statements never appear. No idea what is causing that but the led did blink as expected.It was probably wishful thinking that the change over would be simple. I don’t need any feature of the c6 so I’m going to try Seeeds c3 version.

The media could not be loaded. Great little device. Bought it pre-soldered for my first ever project involving anything electronic and it didn't disappoint. Lots of documentation available online. I didn't make use of most of the features, but used it to run a stepper motor driver, read a thermistor that is attached to the motor as a fail safe incase the cooling fan fails, and to read a rotary encoder to adjust the speed and direction of the motor. P.S: the images show the incomplete project. I need to make a housing, but the electronics work amazingly!Great little device and incredibly tiny!!

These little ESP32C3s are an incredibly good package for the price. Very small, with a nice set of pin outs, a reasonably powerful SoC, and support for any number of external wifi antennas have made these my board of choice for a number of ESPHome powered automations, from weather stations to chicken coop monitoring equipment.It would be nice for the Amazon ones to offer a variant with headers soldered on, but its not really a terribly big deal to solder your own on.