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M5Stack Cardputer

MicroCOM

Pocket serial terminal: talk to routers, Arduinos and other boards over UART right from the Cardputer keyboard.

Chipnik catalog@chipnik-catalog
M5Stack CardputerNo solderingAbout 5 minLicense MITSource on GitHub

What you need

Board
M5Stack Cardputer
Parts
Grove to Dupont cable

MicroCOM is a serial terminal for the Cardputer. Set baud rate, data bits, parity, stop bits, flow control and inverted signals from a menu, then read and type to any device with a UART: a router console, an Arduino, a GPS module or a 3D printer board. Original project by geo-tp on GitHub, MIT. Chipnik hosts the release binaries unchanged so you can flash them from the browser.

RX and TX are on the Grove connector (GPIO1 and GPIO2 by default) and can be changed in the menu. The Cardputer works at 3.3 V, so use a level shifter for 5 V devices.

Firmware files come from the v1.1 release.

Parts

Buy everything for this project
1 ×Grove to Dupont cable

After flashing

  • The board restarts by itself when flashing is done.
  • If nothing happens, press the RST (EN) button once.

Flashing failed or the board behaves oddly

Versions

1.1.0 added to Chipnik 2026-11-05

Release v1.1 of geo-tp/MicroCOM, files unchanged. Release notes on GitHub

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