> **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

# Adafruit UPDI Friend - USB Serial UPDI Programmer

**Type:** Product page · **SKU:** ADA5879 · **Brand:** [Adafruit](https://core-electronics.com.au/brands/adafruit-australia)
**Page:** https://core-electronics.com.au/adafruit-updi-friend-usb-serial-updi-programmer.html ([markdown](https://core-electronics.com.au/adafruit-updi-friend-usb-serial-updi-programmer.html.md))

UPDI stands for Unified Program and Debug Interface, but this board is so smol and cute that we will call it the Unusually Playful Device Interfacer and...

## Pricing

- **Price:** $13.70 (inc GST) — $12.45 AUD, exc GST
- **Quantity discounts:** 10+ $12.08 (exc GST) · 50+ $11.84 (exc GST)

## Availability & dispatch

- Out of stock — the product page offers email notification when it returns.

## How to buy

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## Description

**UPDI** stands for Unified Program and Debug Interface, but this board is so smol and cute that we will call it the **Unusually Playful Device Interfacer** and pat its head when it does a good job. It's designed to make programming modern ATtiny chips very easy because it has 3V or 5V power and logic select, power and transmit indicator LEDs, and a quick cable for poking into a breadboard.

Adafruit have been working a lot with ATtiny816, ATtiny817 and ATtiny1616 chips lately, as for Adafruit's seesaw boards. And Adafruit are often needing to program them with a [CP2102-based breakout](https://core-electronics.com.au/adafruit-cp2102n-friend-usb-to-serial-converter.html) with a [1K resistor soldered between the RX and TX pins](https://learn.adafruit.com/adafruit-attiny817-seesaw/advanced-reprogramming-with-updi). But Adafruit were hankering for a nicer programmer!

This UPDI Friend makes programming such chips very easy:

- **Select between 3V or 5V power and logic** - the 3V regulator can source up to 500mA so it can run even big projects.
- **CH340E USB Serial** converter chip with cross-platform drivers
- **1K Loop-back Resistor** between RX and TX
- **USB Type C** for data and power connection to any computer
- **JST SH cable** included for quick plugging into a breadboard - you can get another [JST SH 3-pin cable with sockets](https://core-electronics.com.au/jst-sh-1mm-pitch-3-pin-to-socket-headers-cable-100mm-long.html) or with [pin header](https://core-electronics.com.au/jst-sh-compatible-1mm-pitch-3-pin-to-premium-male-headers-cable-100mm-long.html) here.
- **0.1" spaced breakout holes** for custom connections.
- **Green power OK LED**
- **Red serial activity LED**
- Inspired by this [open-source hardware design](https://github.com/wagiminator/AVR-Programmer/tree/master/SerialUPDI_Programmer) from [Stefan Wagner](https://github.com/wagiminator)!

Adafruit use Arduino IDE with the [megaTinyCore board support package](https://github.com/SpenceKonde/megaTinyCore) installed, simply select "Serial UPDI" as the programmer type, Adafruit use 230Kbps but 56Kbps is also good.

## Technical Details 

Product Dimensions: 26.4mm x 17.8mm x 4.9mm / 1.0" x 0.7" x 0.2"

Product Weight: 2.3g / 0.1oz

## Images

- [Product image 1](https://core-electronics.com.au/media/catalog/product/A/D/ADA5879-1.jpg)