Adafruit Feather ESP32
Overview
The Adafruit ESP32 Feather is an ESP32-based development board using the Feather standard layout.
It features the following integrated components:
ESP32-PICO-V3-02 chip (240MHz dual core, Wi-Fi + BLE)
520KB SRAM
USB-C port connected to USB to Serial converter
LiPo battery connector and charger
Charging indicator LED and user LED
NeoPixel RGB LED
Reset and user buttons
STEMMA QT I2C connector
Supported Features
The adafruit_feather_esp32 board supports the hardware features listed below.
- on-chip / on-board
- Feature integrated in the SoC / present on the board.
- 2 / 2
-
Number of instances that are enabled / disabled.
Click on the label to see the first instance of this feature in the board/SoC DTS files. -
vnd,foo -
Compatible string for the Devicetree binding matching the feature.
Click on the link to view the binding documentation.
adafruit_feather_esp32@2/esp32/appcpu target
Type |
Location |
Description |
Compatible |
|---|---|---|---|
CPU |
on-chip |
Espressif Xtensa LX6 CPU2 |
|
ADC |
on-chip |
ESP32 ADC2 |
|
Bluetooth |
on-chip |
Bluetooth HCI for Espressif ESP321 |
|
CAN |
on-chip |
ESP32 Two-Wire Automotive Interface (TWAI)1 |
|
Clock control |
on-chip |
ESP32 Clock (Power & Clock Controller Module) Module1 |
|
Counter |
on-chip |
ESP32 Counter Driver based on RTC Main Timer1 |
|
on-chip |
ESP32 general-purpose timers4 |
||
on-chip |
ESP32 counters4 |
||
DAC |
on-chip |
ESP32 Digital to Analog converter (DAC)1 |
|
Ethernet |
on-chip |
ESP32 Ethernet1 |
|
Flash controller |
on-chip |
ESP32 flash controller1 |
|
GPIO & Headers |
on-chip |
ESP32 GPIO controller2 |
|
I2C |
on-chip |
ESP32 I2C2 |
|
I2S |
on-chip |
ESP32 I2S2 |
|
Input |
on-chip |
ESP32 touch sensor input1 |
|
Interrupt controller |
on-chip |
ESP32 Interrupt controller1 |
|
IPM |
on-chip |
ESP32 soft inter processor message1 |
|
Mailbox |
on-chip |
ESP32 soft mailbox1 |
|
MDIO |
on-chip |
ESP32 MDIO controller1 |
|
Memory controller |
on-chip |
ESP32 pseudo-static RAM controller1 |
|
MTD |
on-chip |
Flash node1 |
|
on-chip |
Fixed partitions of a flash (or other non-volatile storage) memory1 |
||
Pin control |
on-chip |
ESP32 pin controller1 |
|
PWM |
on-chip |
ESP32 LED Control (LEDC)1 |
|
on-chip |
ESP32 Motor Control Pulse Width Modulator (MCPWM)2 |
||
RNG |
on-chip |
ESP32 TRNG (True Random Number Generator)1 |
|
SDHC |
on-chip |
ESP32 SDHC controller1 |
|
on-chip |
ESP32 SDHC controller slot2 |
||
Sensors |
on-chip |
ESP32 Pulse Counter (PCNT)1 |
|
Serial controller |
on-chip |
ESP32 UART3 |
|
SPI |
on-chip |
ESP32 SPI2 |
|
SRAM |
on-chip |
Generic on-chip SRAM2 |
|
Watchdog |
on-chip |
||
Wi-Fi |
on-chip |
ESP32 SoC Wi-Fi1 |
adafruit_feather_esp32@2/esp32/procpu target
Type |
Location |
Description |
Compatible |
|---|---|---|---|
CPU |
on-chip |
Espressif Xtensa LX6 CPU2 |
|
ADC |
on-chip |
ESP32 ADC2 |
|
Bluetooth |
on-chip |
Bluetooth HCI for Espressif ESP321 |
|
CAN |
on-chip |
ESP32 Two-Wire Automotive Interface (TWAI)1 |
|
Clock control |
on-chip |
ESP32 Clock (Power & Clock Controller Module) Module1 |
|
Counter |
on-chip |
ESP32 Counter Driver based on RTC Main Timer1 |
|
on-chip |
ESP32 general-purpose timers4 |
||
on-chip |
ESP32 counters4 |
||
DAC |
on-chip |
ESP32 Digital to Analog converter (DAC)1 |
|
Ethernet |
on-chip |
ESP32 Ethernet1 |
|
Flash controller |
on-chip |
ESP32 flash controller1 |
|
GPIO & Headers |
on-chip |
ESP32 GPIO controller2 |
|
I2C |
on-chip |
||
I2S |
on-chip |
ESP32 I2S2 |
|
Input |
on-chip |
ESP32 touch sensor input1 |
|
on-board |
Group of GPIO-bound input keys1 |
||
Interrupt controller |
on-chip |
ESP32 Interrupt controller1 |
|
IPM |
on-chip |
ESP32 soft inter processor message1 |
|
LED |
on-board |
Group of GPIO-controlled LEDs1 |
|
LED strip |
on-board |
Worldsemi WS2812 LED strip, SPI binding1 |
|
Mailbox |
on-chip |
ESP32 soft mailbox1 |
|
MDIO |
on-chip |
ESP32 MDIO controller1 |
|
Memory controller |
on-chip |
ESP32 pseudo-static RAM controller1 |
|
MTD |
on-chip |
Flash node1 |
|
on-chip |
Fixed partitions of a flash (or other non-volatile storage) memory1 |
||
Pin control |
on-chip |
ESP32 pin controller1 |
|
PWM |
on-chip |
ESP32 LED Control (LEDC)1 |
|
on-chip |
ESP32 Motor Control Pulse Width Modulator (MCPWM)2 |
||
RNG |
on-chip |
ESP32 TRNG (True Random Number Generator)1 |
|
SDHC |
on-chip |
ESP32 SDHC controller1 |
|
on-chip |
ESP32 SDHC controller slot2 |
||
Sensors |
on-chip |
ESP32 Pulse Counter (PCNT)1 |
|
Serial controller |
on-chip |
||
SPI |
on-chip |
||
SRAM |
on-chip |
Generic on-chip SRAM2 |
|
Watchdog |
on-chip |
||
Wi-Fi |
on-chip |
ESP32 SoC Wi-Fi1 |
System requirements
Prerequisites
Espressif HAL requires WiFi and Bluetooth binary blobs in order to work. Run the commands below to retrieve the files.
west update
west blobs fetch hal_espressif
Building & flashing
Use the standard build and flash process for this board. See Building an Application and Run an Application for more details.
# From the root of the zephyr repository
west build -b adafruit_feather_esp32/esp32/procpu samples/hello_world
west flash
The baud rate of 921600bps is set by default. If experiencing issues when flashing,
try using different values by using --esp-baud-rate <BAUD> option during
west flash (e.g. west flash --esp-baud-rate 115200).
After flashing, view the serial monitor with the espressif monitor command.
west espressif monitor
Testing
On-board LED
Test the functionality of the user LED connected to pin 13 with the blinky sample program.
# From the root of the zephyr repository
west build -b adafruit_feather_esp32/esp32/procpu samples/basic/blinky
west flash
NeoPixel
Test the on-board NeoPixel using the led_strip sample program.
# From the root of the zephyr repository
west build -b adafruit_feather_esp32/esp32/procpu samples/drivers/led/led_strip
west flash
Wi-Fi
Test ESP32 Wi-Fi functionality using the Wi-Fi shell module.
Note
The hal_espressif blobs must be fetched first.
# From the root of the zephyr repository
west build -b adafruit_feather_esp32/esp32/procpu samples/net/wifi/shell
west flash