WeMos Arduino Zero Clone
Support for the WeMos Arduino Zero Clone board.
Support for the WeMos Arduino Zero Clone board.
Overview
The WeMos Zero is a cheap clone of Arduino Zero featuring a ATSAMD21G18A. These boards either have a silkscreen "WeMos" or "HW-910" label on their back. Unlike the original Zero, it does not include an embedded debugger/programmer. Instead, the UF2 Bootloader is used to program this board. The SAMD21 is a ARM Cortex-M0+ micro-controller. It has 256KiB of flash memory and 32KiB of RAM.
- Note
- The official Arduino Zero using the native USB port and the Adafruit Metro M0 Express should also work with this board definition.
Hardware
MCU
| MCU | ATSAMD21G18A |
|---|---|
| Family | ARM Cortex-M0+ |
| Vendor | Atmel |
| RAM | 32KiB |
| Flash | 256KiB |
| Frequency | up to 48MHz |
| FPU | no |
| Timers | 6 (1x 16-bit, 2x 24-bit, 3x 32-bit) |
| ADCs | 6x 12-bit channels) |
| UARTs | 2 |
| SPIs | max 6 (see UART) |
| I2Cs | max 6 (see UART) |
| Vcc | 1.8V - 3.6V |
| Datasheet | Datasheet |
User Interface
1 LED:
| Device | PIN |
|---|---|
| LED0 | PA17 |
Flashing the device
Assuming the Arduino Bootloader is installed, just run:
make BOARD=wemos-zero flash
Hint: You can you press the reset button twice to manually enter the bootloader. This is helpful if the board has crashed (e.g. due to a failed assert() during start up).
