Design with Adafruit HUZZAH32 ESP32 Feather in Cirkit DesignerThe Adafruit HUZZAH32 ESP32 Feather is a compact development board based on the popular ESP32 microcontroller. This board is part of the Feather ecosystem, which is a collection of development boards with a standardized form factor and pinout, designed by Adafruit Industries. The HUZZAH32 is specifically tailored for Internet of Things (IoT) projects, wireless connectivity, and rapid prototyping. It offers a rich set of features including Wi-Fi and Bluetooth connectivity, a wide range of GPIOs, and compatibility with a multitude of sensors and actuators.
This circuit consists of an Adafruit HUZZAH32 ESP32 Feather microcontroller, a temperature sensor, and a battery. The ESP32 reads temperature data from the sensor and is powered by the battery, enabling wireless temperature monitoring.
Open Project in Cirkit Designer
This circuit features an Adafruit HUZZAH32 ESP32 Feather board as the central microcontroller, which is connected to an Adafruit Quad AlphaNumeric Featherwing display and an Adafruit ADXL343 accelerometer via I2C communication (SCL and SDA lines). The ESP32 controls a vibration motor connected to one of its GPIO pins (A5_IO4) and shares a common power supply (3.3V) and ground (GND) with the other components. The purpose of this circuit is likely to read acceleration data, display information on the alphanumeric display, and provide haptic feedback through the vibration motor.
Open Project in Cirkit Designer
This circuit features an Adafruit HUZZAH32 ESP32 Feather microcontroller connected to an Adafruit LSM303AGR sensor via I2C communication lines (SCL and SDA), a force sensing resistor (FSR) interfaced through an analog input with a pull-up resistor, and powered by a 3xAA battery pack. The LSM303AGR sensor provides acceleration and magnetic field measurements, while the FSR detects applied force. The ESP32 processes these inputs and can be programmed to respond to sensor data for applications such as motion tracking and force measurement.
Open Project in Cirkit Designer
This circuit integrates an Adafruit HUZZAH32 ESP32 Feather microcontroller with four MPU-9250/6500/9255 sensors. The ESP32 is configured to communicate with the sensors via a shared SPI bus, as indicated by the connections to MISO, MOSI, and SCK pins, with individual chip select lines (NCS) for each sensor. The purpose of this circuit is likely to gather motion tracking data from multiple sensors for processing or logging by the ESP32.
Open Project in Cirkit Designer| Pin Number | Function | Description |
|---|---|---|
| 1 | GND | Ground |
| 2 | 3V | 3.3V power supply |
| 3 | EN | Reset pin (active low) |
| 4 | 21 (SDA) | I2C Data |
| 5 | 22 (SCL) | I2C Clock |
| 6 | 23 | SPI MOSI (Master Out Slave In) |
| 7 | 24 | SPI MISO (Master In Slave Out) |
| 8 | 25 | SPI CLK (Clock) |
| 9 | A0 | Analog input |
| ... | ... | ... |
| 28 | TXO | Serial Transmit |
| 29 | RXI | Serial Receive |
| 30 | A5 | Analog input (can also be used as a DAC output) |
Note: This is a partial list of pins for brevity. Please refer to the official datasheet for the full pinout.
Powering the Board:
Programming the Board:
Connecting Peripherals:
Here is a simple example of how to blink an LED connected to pin 13 on the HUZZAH32 using the Arduino IDE:
// Define the LED pin
const int ledPin = 13;
// the setup function runs once when you press reset or power the board
void setup() {
// initialize digital pin ledPin as an output.
pinMode(ledPin, OUTPUT);
}
// the loop function runs over and over again forever
void loop() {
digitalWrite(ledPin, HIGH); // turn the LED on (HIGH is the voltage level)
delay(1000); // wait for a second
digitalWrite(ledPin, LOW); // turn the LED off by making the voltage LOW
delay(1000); // wait for a second
}
Note: This code is for demonstration purposes and assumes an LED with an appropriate resistor is connected to pin 13.
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