ATOM Printer



ATOM Printer offers the best value in a desktop DIY thermal printer, includes an ESP32-Pico based IoT controller ATOM Lite, and a 58mm thermal printer to meet your multiple printing requirements. Supports text, graphics, barcode, QR code printing. The ATOM Printer has geekery kraft packaging design, built-in firmware boasts two modes of AP Connect Print + MQTT Notifications Print . You can enrich your creation, fun and practical with ATOM Lite IoT controller.

Note: This kit excludes the power adapter. A DC 12V / 2.5A power adapter (5.5mm jack) is recommended.

Product Features

  • ATOM Lite: ESP32-Pico-D4 4MB Flash IoT controller
  • Sleek, Geekery kraft packaging design
  • Supports for text/graphics/BarCode/QRCode
  • Communication interface: UART
  • Fast printing, high resolution
  • How to use:
    • AP hotspot connection, web-controlled printing
    • Printing content sent via MQTT (Topic is device Mac address)
    • Serial command control (UART 9600bps 8N1)
    • Development platform: Arduino, UIFlow


  • 1x ATOM LITE
  • 1x ATOM Printer
  • 1x thermal paper roll
  • 1x sticky thermal paper roll


  • Can be widely used in printing taxi bill, parking bill, express delivery invoice, restaurant order and so on.


Specifications Parameters
Printing method Thermal printing
Supported text and graphics Text, graphics, characters, BarCode(Codebar, code93, code39, code128, ENA13, ITF25, UPC-A, UPC-E), QRCode
Supply voltage DC 12V
Working current 2.5A
Print color Monochrome
Print speed/resolution 60mm/s 203dpi 8 dots/mm up to 384 dots per line
Printing width 58mm
Service life Printing distance 50km
Paper Cut By Hands
Max. Diameter of Paper Roll 58mm±0.05mm (width) 0.05~0.1mm (thickness), maximum diameter ≤40mm
Printing speed 60mm/s
Connectivity Technology USB/RS232/TTL (ATOM is connected to TTL interface by default UART 9600bps 8N1)
Net weight 285g
Gross weight 321g
Product size 151 * 79 * 66mm
Package size 158 * 82 * 70mm


EasyLoader is a simple and fast program burner, which has a built-in product-related case program, which can be burned to the main control through simple steps to perform a series of functional verification.

Download Windows Version Easyloader


ATOM G23 G33 G19


After powering the ATOM Printer, the indicator on the ATOM main control will show the current state and mode of the device. Click the middle button on the ATOM to switch between different modes (AP/MQTT).


firmware burning

Click here to go to the download page to download M5Burner , click Erase to erase flash first, and then click Burn to start burning firmware.

AP Mode

Indicator light:

  • 1.When No equipment is connected, the indicator light is Green fast flashing.
  • 2.When there is device access, the indicator light is steady green.


  • 1.When switching to the AP mode, the device will start the AP hotspot ATOM_PRINTER_XXXX, and the user can use a mobile phone or computer to directly connect to the AP (without password).
  • 2.After the connection is successful, the connected device will automatically pop up the configuration page. You can directly enter the content on this page to print text, two-dimensional code, and one-dimensional code content.
  • 3.At the bottom of the page is the WiFi configuration option, through which you can configure the device to connect to the specified WiFi and switch to work in MQTT mode.

MQTT mode

Indicator light:

  • 1.When WiFi connection failed, the indicator light is Red flashing quickly.
  • 2.When the WiFi&MQTT server is not connected, the indicator light is blue fast flashing.
  • 3.When the WiFi&MQTT server has been successfully connected, the indicator light is steady blue.


  • 1.Before switching to MQTT mode, you need to configure WiFi information for the device through the configuration page of AP mode. After completing the configuration, the device will automatically restart and enter MQTT mode.
  • 2.If there are multiple times of WiFi connection failure, you can press the middle button of ATOM to switch to AP mode and reconfigure WiFi information.
  • 3.After successfully connecting to the MQTT server, ATOM Printer will automatically print out the subscribed Topic information (Topic is the Mac address of the device).
  • 4.Users can connect to mqtt through [UIFlow](https://flow.m5stack.com/) or other tools (such as [EMQ MQTT Tools](http://tools.emqx.io/)). m5stack.com (port 1883). Distribute Topic content corresponding to ATOM Printer device to realize remote printing.



Common commands

NO Function command
1 Init 0x1B,0x40
2 Set Print Position X mm 0x1B,0x24,(X * 8)&0x00ff,((X * 8)>>8)&0x00ff
3 Set Left Margin X mm 0x1D,0X4C,(X * 8)&0xff,((X * 8)>>8)&0x00ff
4 Set Line Space X mm 0x1B,0x33,(X *8)
5 Set Baud Rate: X 0x1B,0x23,0x23,0x53,0x42,0x44,0x52,X
6 Set Character Size:X,Y 0x1D,0x21,((X&0x0f)<<4)
7 Set Bold:on/off 0x1B,0X47,0x01/0x00
8 Set Underline:on/off 0x1B,0x2D,0x01/0x00


NO Function command
1 Print X at Y mm 0x1B,0x24,(Y * 8)&0x00ff,((Y * 8)>>8)&0x00ff,X
2 Set Print Position X mm 0x1D,0x28,0x6B,0x03,0x00,0x31,0x45,X (L:0x48/M:0x49/Q:0x50/H:0x51)


NO Function command
1 Set QRCode Adjust Level X 0x1D,0x28,0x6B,0x03,0x00,0x31,0x45,X (L:0x48/M:0x49/Q:0x50/H:0x51)
2 Set QRCode Buffer Length:L Buffer:X 0x1D,0x28,0x6B,(L+3)&0x00ff,((L+3)>>8)&0x00ff,0x31,0x50,0x30,X,0x00
3 Print QRCode 0x1D,0x28,0x6B,0x03,0x00,0x31,0x51,0x30,0x00


NO Function command
1 Barcode Sw:on/off 0x1D,0x45,0x43,0x01/0x00
2 Set HRI Position 0x1D,0x48,hide:0x00/above:0x01/below:0x02/both:0x03
3 Print BarCode
Type:T Length:L Buffer:X
Type: UPC-A=0x41/UPC-E=0x42/JAN13(EAN13)=0x43/JAN8(EAN8)=0x44/CODE39=0x45/ITF=0x46/CODABAR=0x47/CODE93=0x48/CODE128=0x49


NO Function command
1 Print BMP Width:W Hight:H Data:X 0x1D,0X76,0X30,(W/8)&0x00ff,((W/8)>>8)&0x00ff,H&0x00ff,(H>>8)&0x00ff,X


  • Print log of PM2.5 module to ATOM Printer with MQTT