pyWiFi-ESP32 Development Board Kit
ESP32-based development board kit for MicroPython programming with WiFi, IoT capabilities, and included sensors.
Pinout
24 pins
| Pin | GPIO | Labels | Status | Capabilities | Notes |
|---|---|---|---|---|---|
| 1 | 0 | IO0GPIO0 | strapping | - | GPIO0, Boot Mode Selection, Button |
| 2 | 2 | IO2GPIO2 | strapping | - | GPIO2, General Purpose I/O, LED |
| 3 | 4 | IO4GPIO4 | strapping | - | GPIO4, General Purpose I/O |
| 4 | 5 | IO5GPIO5 | strapping | - | GPIO5, General Purpose I/O |
| 5 | 12 | IO12GPIO12 | strapping | adc | GPIO12, ADC or GPIO |
| 6 | 13 | IO13GPIO13 | strapping | adc | GPIO13, ADC or GPIO |
| 7 | 14 | IO14GPIO14 | strapping | adc | GPIO14, ADC or GPIO |
| 8 | 15 | IO15GPIO15 | strapping | adc | GPIO15, ADC or GPIO |
| 9 | 16 | IO16GPIO16 | strapping | - | GPIO16, General Purpose I/O |
| 10 | 3 | RXGPIO3 | uart | uart | UART0 Receive |
| 11 | 1 | TXGPIO1 | uart | uart | UART0 Transmit |
| 12 | 17 | IO17GPIO17 | strapping | - | GPIO17, General Purpose I/O |
| 13 | 18 | IO18GPIO18 | safe | - | GPIO18, General Purpose I/O |
| 14 | 19 | IO19GPIO19 | safe | - | GPIO19, General Purpose I/O |
| 15 | 21 | IO21GPIO21 | safe | i2c | GPIO21, I2C SDA |
| 16 | 22 | IO22GPIO22 | safe | i2c | GPIO22, I2C SCL |
| 17 | 23 | IO23GPIO23 | safe | spi | GPIO23, SPI MOSI |
| 18 | 25 | IO25GPIO25 | safe | dac | GPIO25, DAC1 |
| 19 | 26 | IO26GPIO26 | safe | dac | GPIO26, DAC2 |
| 20 | 27 | IO27GPIO27 | safe | adc | GPIO27, ADC |
| 21 | 32 | IO32GPIO32 | safe | adc | GPIO32, ADC |
| 22 | 33 | IO33GPIO33 | safe | adc | GPIO33, ADC |
| 23 | 34 | IO34GPIO34 | strapping | adc | GPIO34, ADC Input Only |
| 24 | 35 | IO35GPIO35 | strapping | adc | GPIO35, ADC Input Only |
Start with these
10 pins with no boot or system involvementFreely assignable - no strapping, flash, USB or JTAG duties. Ideal first picks for buttons, sensors and LEDs.
Fine - with a little care
sampled at boot or shared with debug/serial| Pin | Label | What to know | Role |
|---|---|---|---|
| IO0 | GPIO0 | Must be HIGH during boot for normal startup; if held LOW on reset, forces flash programming mode. | Strapping |
| IO2 | GPIO2 | If driven HIGH on reset (while IO0 is LOW), selects an unsupported SDIO boot mode, causing boot failure. | Strapping |
| IO4 | GPIO4 | Sampled at reset for boot config; should not be driven at boot (affects boot mode timing). | Strapping |
| IO5 | GPIO5 | Must be HIGH during boot; if pulled LOW at reset, alters SDIO slave timing and may prevent normal boot. | Strapping |
| IO12 | MTDI (GPIO12) | Keep LOW during boot (internal PD); pulling HIGH at reset selects 1.8V flash mode, causing flash brownout if 3.3V flash is used. | Strapping |
| IO13 | MTCK (GPIO13) | Used for JTAG debugging (TCK); avoid using as GPIO if JTAG is needed. | Other |
| IO14 | MTMS (GPIO14) | Used for JTAG debugging (TMS); driving it as GPIO may interfere with JTAG or produce spurious signals at boot. | Other |
| IO15 | MTDO (GPIO15) | Keep HIGH during boot (internal PU); if LOW on reset, bootloader log is silenced and boot mode may change. | Strapping |
| IO34 | GPIO34 | Cannot be used as output (no drive capability); only suitable for analog/digital input. | Other |
| IO35 | GPIO35 | Cannot be used as output; only suitable for input. | Other |
Only if you know the tricks
wired to flash or USB - expect a fight| Pin | Label | What to know | Role |
|---|---|---|---|
| IO16 | GPIO16 | Connected to internal PSRAM on PSRAM-enabled modules; not usable as GPIO on those modules. | Flash |
| RX | U0RXD (GPIO3) | Used for receiving data from USB-UART (programming); also pulled HIGH at boot for console communication, so using as GPIO can disrupt uploads. | USB |
| TX | U0TXD (GPIO1) | Connected to on-board USB-UART for uploading and logs; drives serial output at boot, so using as GPIO can disrupt programming or console. | USB |
| IO17 | GPIO17 | Connected to internal PSRAM on PSRAM-enabled modules; not usable as GPIO on those modules. | Flash |
Pinout notes The pyWiFi-ESP32 Development Board Kit pinout brings out 24 GPIO pins - every one of them usable in your project. For peripherals, TX / RX on GPIO1 and GPIO3…
The pyWiFi-ESP32 Development Board Kit pinout brings out 24 GPIO pins - every one of them usable in your project.
For peripherals, TX/RX on GPIO1 and GPIO3 cover serial logging and flashing.
On the analog side there are 9 ADC-capable pins for sensors and battery monitoring and 2 true DAC outputs.
If you want zero surprises, IO18, IO19, IO21, IO22 and 6 more are free of any such role - the safest first picks. 10 of the exposed pins carry boot-time or system duties on the ESP32 (IO0, IO2, IO4 and 7 more).
Getting started
flash your first firmware in ~2 minutesBoard: Esp32 Dev
Flash Size: 4MB · DIO
Upload Speed: 921600
// blink
pinMode(18, OUTPUT);
digitalWrite(18, LOW); // on (often inverted)[env:pywifi-esp32]
platform = espressif32
board = esp32dev
framework = arduino
monitor_speed = 115200
upload_speed = 921600esp32:
board: esp32dev
variant: esp32
framework:
type: esp-idf
# blink - GPIO18
output:
- platform: gpio
pin: 18
id: led_out
light:
- platform: binary
name: "LED"
output: led_outesptool.py --chip esp32 --port /dev/ttyACM0 \
write_flash 0x0 firmware.binGood to know
board-specific quirks worth 60 seconds
pyWiFi-ESP32 Kit Contents Included Components pyWiFi-ESP32 Board: Main ESP32 development board pyBase: Expansion base board with additional interfaces 0.96" OLED Display: I2C OLED screen for output Micro USB Cable: For power and programming Sensors: Atmospheric Pressure, Water Level, Soil Humidity, Ultrasonic, Human Infrared, Photosensitive Perfect For This kit is ideal for learning MicroPython, IoT development, and…
pyWiFi-ESP32 Kit Contents
Included Components
- pyWiFi-ESP32 Board: Main ESP32 development board
- pyBase: Expansion base board with additional interfaces
- 0.96" OLED Display: I2C OLED screen for output
- Micro USB Cable: For power and programming
- Sensors: Atmospheric Pressure, Water Level, Soil Humidity, Ultrasonic, Human Infrared, Photosensitive
Perfect For
This kit is ideal for learning MicroPython, IoT development, and building sensor-based projects. The included sensors enable quick prototyping of environmental monitoring, automation, and interactive applications.
Getting Started
Connect via Micro USB, install MicroPython firmware using esptool, and start coding with Thonny IDE or similar. The kit provides everything needed for immediate IoT experimentation.
Specifications
ESP32About this board
At its core is the ESP32 - a dual-core Xtensa with both Bluetooth Classic and BLE.
Expect to pay about $15.00 - less than the ~$20 most ESP32 boards go for.
Onboard you'll find status LEDs (Blue) and KEY buttons.
The pyWiFi-ESP32 is a comprehensive development kit based on the ESP32 microcontroller, designed for MicroPython programming and IoT applications. It features integrated Wi-Fi 802.11 b/g/n and Bluetooth 4.2 + BLE for wireless connectivity.
Powered by a dual-core Xtensa 32-bit LX6 processor at up to 240 MHz, with 4MB flash memory and 520KB SRAM, it's ideal for IoT projects, home automation, and educational purposes.
The kit includes a variety of sensors: Atmospheric Pressure Sensor, Water Level Sensor, Soil Humidity Sensor, Ultrasonic Sensor, Human Infrared Sensor, and Photosensitive Sensor. It also comes with a pyBase expansion board, 0.96" OLED display, and Micro USB cable.
Operating at 3.3V with power input from 3.6V to 6V (recommended USB 5V), and 3.3V output up to 600mA. Features an onboard LED connected to GPIO2 and a button on GPIO0. Supports I2C and PWM on any GPIO pin.
Where to buy
prices are typical street prices
Resources
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