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Pycom Board Pinout Reference

Find Pycom development board pinouts instantly with this free Pycom Board Pinout Reference. View GPIO layouts, power pins, communication interfaces, ADC, DAC, PWM, and connector configurations.

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Wi-Fi & BLE ESP32 Module
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Input Parameters Specification

Pin Muxing Capabilities Details on port pins designed to share general-purpose input/output (GPIO), analog inputs, PWM, and communications.
Operating Voltage (3.3V vs 5V) Voltage logic level constraints defining safety margins for high-level inputs to avoid destroying internal gates.
Primary Bus Interfaces Dedicated line paths mapped to SPI (MISO/MOSI/SCK), I2C (SDA/SCL), and serial UART (TX/RX) standards.
Power Sourcing Schemes Power routing configurations allocating load paths across USB, battery inputs (VBAT), and regulated pin rails.

Practical Operational Examples

Configuring Pycom Console

Establish serial debugging connections by linking GP21 and GP22 to a 3.3V USB-to-UART converter.

Using Hardware PWM

Map control lines to standard PWM channels on the board to drive motor controllers or dim LEDs.

Adding I2C Bus Pull-Ups

Ensure 4.7k-ohm pull-up resistors are installed between SDA/SCL lines and the 3.3V power node for proper communication.

Using Wake Buttons

Connect active-low tactile switches to the GP3 pin to allow system wake interrupts from deep sleep.

Hardware and Logic Theory

Pycom development modules are based on the dual-core Espressif ESP32 SoC architecture, supplemented by specialty RF co-processors for LoRa, Sigfox, and LTE-M. Operating strictly on a 3.3V CMOS logic rail, these platforms can be damaged if exposed to 5V inputs. Always use active logic-level converters when interfacing with high-voltage sensors.

Tip: Always tie unused input lines to GND using high-value resistors to prevent erratic behavior from electrostatic interference.

Formulas & Hardware Calculations

Series Current Limiting: R_series = (3.3V - V_led) / I_target (Keep below 4-8mA per pin)
I2C Pull-Up Range: R_min = (3.3V - V_low) / I_sink, preventing overcurrent drain on open-drain pins.
RF Trace Impedance: Antenna coaxial traces must maintain a characteristic impedance of exactly 50 Ohms to minimize signal reflection.

Step-by-Step Selection Walkthrough

Choose the target Pycom board using the select menu at the top of the page.
Review the updated standard card showing the board's class and primary chipset.
Study the customized 2D vector layout showing board structure and pin headers.
Consult the exhaustive connection tables below the diagram to locate specific peripheral pin assignments.

About This Reference Guide

Your direct lookup path for Pycom and Particle IoT modules.

This reference index consolidates pin configurations, expansion header maps, and line assignments for classic WiPy, LoPy, and specialized Particle IoT platforms.

Finding accurate pinout layouts is crucial for embedded designers, system architects, IoT engineers, and DIY hobbyists. This directory documents active signal paths to help prevent wiring errors, serial protocol failures, and board damage.

Always verify pinout configurations with a digital multimeter before powering up custom circuits or shield adapters.

Supported BoardsWiPy 2.0, WiPy 3.0, LoPy, LoPy4/Argon models, and classic Particle Photon modules.
Hardware SafeguardsClear warnings regarding 3.3V logic thresholds and RF antenna lines.
Protocol MapsDirect pin definitions for SPI, UART, I2C, DAC, and active RF lines.
Power ProfilesIdentifies battery charge nodes and unregulated raw input pins.

Frequently Asked Questions

1. Are Pycom GPIO pins 5V tolerant?

No, the logic pins operate strictly at a 3.3V threshold. Exposing any GPIO, SPI, or UART pins to a 5V logic source without a level shifter can cause immediate hardware failure.

2. What is the maximum safe input voltage for the VIN pin?

The on-board regulators on Pycom modules can accept external power inputs ranging from 3.5V to 5.5V DC safely.

3. How do I configure the on-board LoRa/Sigfox antenna?

You can switch between the on-board ceramic antenna and the u.FL connector in software using Pycom antenna API calls.

4. Why do the SPI and I2C lines share pins with GPIOs?

The ESP32 features a flexible pin routing multiplexer, allowing software to reconfigure digital pins to support SPI, UART, I2C, or standard GPIO tasks dynamically.

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