Adafruit Metro M4 Express featuring ATSAMD51 by lady ada published April 18, 2018, last edited January 22, 2025 last major update December 08, 2021 posted in Adafruit Products CircuitPython Arduino Compatibles/ Adafruit METRO Save New Favorite × Please sign in to include this guide in your list of favorites. You will be redirected back to this guide once you sign in, and can then save this guide as one of your favorites. Download Overview Update the UF2 Bootloader Pinouts UF2 Bootloader Details Arduino IDE Setup Using with Arduino IDE Adapting Sketches to M0 & M4 What is CircuitPython? CircuitPython Installing the Mu Editor Creating and Editing Code Connecting to the Serial Console Interacting with the Serial Console The REPL CircuitPython Libraries Frequently Asked Questions Welcome to the Community! Advanced Serial Console on Windows Advanced Serial Console on Mac "Uninstalling" CircuitPython Troubleshooting CircuitPython Essentials CircuitPython Pins and Modules CircuitPython Built-Ins CircuitPython Digital In & Out CircuitPython Analog In CircuitPython Analog Out CircuitPython PWM CircuitPython Servo CircuitPython Internal RGB LED CircuitPython NeoPixel CircuitPython DotStar CircuitPython UART Serial CircuitPython I2C CircuitPython HID Keyboard and Mouse CircuitPython Expectations Downloads CircuitPython CPU Temp Single page Feedback? Corrections? LLM Markdown View Primary Products Adafruit Metro M4 feat. Microchip ATSAMD51 $27.50 Add to Cart Featured Products view all JTAG (2x10 2.54mm) to SWD (2x5 1.27mm) Cable Adapter Board $4.95 Add to Cart 10-pin 2x5 Socket-Socket 1.27mm IDC (SWD) Cable - 150mm long $2.95 Add to Cart SEGGER J-Link BASE - JTAG/SWD Debugger $499.95 Add to Cart SEGGER J-Link EDU Mini - JTAG/SWD Debugger $59.95 Add to Cart 81 Beginner Product guide Downloads Files ATSAMD51J19 Product page w/datasheets (the main chip on the Metro M4) Fritzing object in the Adafruit Fritzing Library EagleCAD files on GitHub 3D models on GitHub UF2 Bootloader updater (only needed for Metro M4's shipped before May 8, 2018) PDF for Metro M4 Express Board Diagram on GitHub SVG for Metro M4 Express Board Diagram Schematic & Fabrication Print Page last edited March 08, 2024 Text editor powered by tinymce. CircuitPython Expectations CircuitPython CPU Temp