> **Source:** Core Electronics is an Australian maker-electronics retailer and manufacturer based in Newcastle, NSW, run by a team of makers and educators. We design and manufacture our own product lines (PiicoDev, CE originals) and are official retailers for iconic maker and industrial brands including Raspberry Pi, Arduino, Adafruit, SparkFun and DFRobot. Orders ship Australia-wide from our Newcastle warehouse. Prices are in AUD and include GST. Pricing, stock and dispatch on this page are generated from the store's live catalog. Full machine-readable index: https://core-electronics.com.au/llms.txt

# Pycom Expansion Board 3.1

**Type:** Product page · **SKU:** CE05545 · **Brand:** [Pycom](https://core-electronics.com.au/brands/pycom)
**Page:** https://core-electronics.com.au/pycom-expansion-board-3-1.html ([markdown](https://core-electronics.com.au/pycom-expansion-board-3-1.html.md))

## Retired product

This product is retired and no longer available for purchase. Search the catalogue for an alternative.

## How to buy

- **Search the catalogue:** `https://core-electronics.com.au/search/{query}.md` (URL-encode the query; pages 2-3 at `search/{query}/{page}.md`; `search.md?q=` also works)
- **Payment methods, purchase orders, policies and contact details:** https://core-electronics.com.au/llms.txt
## Description

Introducing the Expansion Board 3.1, compatible with the [WiPy](https://core-electronics.com.au/pycom-wipy-3-0.html), LoPy, [LoPy4](https://core-electronics.com.au/pycom-lopy4.html), [SiPy](https://core-electronics.com.au/pycom-sipy.html), [FiPy](https://core-electronics.com.au/pycom-fipy-py.html) and [GPy](https://core-electronics.com.au/pycom-gpy-py.html).

NOTE: Does not include the [WiPy](https://core-electronics.com.au/pycom-wipy-3-0.html)

### Features

- USB and LiPo battery powered
- Custom PIC USB to serial converter with automatic bootloader mode
- LiPo battery charger (BQ24040), with options for two different charging currents (100mA and 450mA)
- TPS2115A with reverse voltage protection
- MicroSD card slot
- JST-PH style battery connector
- Power LED and charge status LED
- One user LED and one user switch
- Button to enter into “safe mode” easily
- Battery voltage monitoring via the WiPy ADC
- Lots of jumpers to enable/disable features
 
### Dimensions

- Size: 65 x 50 x 8mm
- Weight: 18g
 
### Datasheets

- [Specifications](https://docs.pycom.io/datasheets/boards/expansion3)
- [Pinout Diagram](https://docs.pycom.io/datasheets/boards/expansion3#pinout)
- [Documentation](https://docs.pycom.io/)

## Guides for this product

- [WS2812 / NeoPixel Addressable LEDs: Pycom Quickstart Guide](https://core-electronics.com.au/guides/pycom/WS2812_and_NeoPixel_with_Pycom/)
- [How to Debug MicroPython Code](https://core-electronics.com.au/guides/micropython/connect-to-MicroPython-in-windows/)
- [Temperature Sensing with the TMP36 and Pycom](https://core-electronics.com.au/guides/pycom/temperature-sensing-pycom-tmp36-tutorial/)
- [Light Sensing with an LDR and Pycom](https://core-electronics.com.au/guides/pycom/sensing-light-with-ldr-and-pycom-lopy4/)

## Videos for this product

- [Pycom LoPy4 Nano Gateway for LoRaWAN](https://core-electronics.com.au/videos/pycom-lopy4-nano-gateway-for-lorawan)
- [Getting Started with Pycom GPy](https://core-electronics.com.au/videos/getting-started-with-pycom-gpy)
- [How to Update Firmware on Pycom GPy & FiPy Cellular LTE](https://core-electronics.com.au/videos/how-to-update-firmware-on-pycom-gpy-fipy-cellular-lte)

## Images

- [Product image 1](https://core-electronics.com.au/media/catalog/product/p/y/pycom-expansion-3-1.jpg)