{"title":"Adafruit UPDI Friend - USB Serial UPDI Programmer","handle":"adafruit-updi-friend-usb-serial-updi-programmer-ada5879","url":"/products/adafruit-updi-friend-usb-serial-updi-programmer-ada5879","description":"The Adafruit UPDI Friend is a compact USB serial programmer for ATtiny microcontrollers that use the UPDI (Unified Program and Debug Interface) protocol. Built around the CH340E USB serial converter with USB Type-C, it provides reliable cross-platform programming with switchable 3V or 5V power and logic levels.\n\nA built-in 1K loop-back resistor between the RX and TX pins ensures dependable UPDI communication. Simply connect the included JST SH cable to your breadboard, select \"Serial UPDI\" as the programmer in the Arduino IDE with megaTinyCore, and you're ready to program.\n\nKey Features\n\n\nSwitchable 3V/5V – Select power and logic levels to match your target microcontroller\n\nUSB Type-C – Modern connector for power and data\n\nCH340E USB Serial – Cross-platform driver support (Windows, macOS, Linux)\n\nBuilt-in 1K Loop-Back Resistor – Reliable UPDI communication between RX and TX\n\n3V Regulator – Delivers up to 500 mA for powering your target board\n\nStatus LEDs – Green power LED and red serial activity LED\n\nBreakout Pads – 0.1\" spaced holes for custom wiring\n\nCompact Size – 26.4 × 17.8 × 4.9 mm (1.0\" × 0.7\" × 0.2\")\n\n\nIdeal For\n\nProgramming ATtiny816, ATtiny817, ATtiny1616, and other UPDI-based ATtiny chips\nArduino IDE projects using the megaTinyCore board support package\nBreadboard prototyping with ATtiny microcontrollers\n\n\nPackage Contents\n\n1× Adafruit UPDI Friend (fully assembled)\n1× JST SH cable for breadboard connection\n\n\n\nTip: In the Arduino IDE, select \"Serial UPDI\" as the programmer type. Recommended baud rates are 230 Kbps or 56 Kbps for best results.\n\n\nResources\n\n\nAdafruit UPDI Friend Guide – Setup, wiring, and usage instructions\n","vendor":"Adafruit","product_type":"physical","in_stock":true,"options":[],"variants":[{"id":1184,"title":"Default Title","sku":"AF-5879","mpn":"ADA5879","price":13.55,"compare_at_price":0.0,"on_sale":false,"in_stock":true,"available_quantity":1,"option1":"Default Title"}]}