Embedded Thermal Printer - TTL Serial

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Topic: Arduino
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The embedded thermal printer uses thermal technology, it doesn't need to add toner or ink, stable performance, and mini size. The embedded thermal printers are widely used in instrumentation, food inspection, shopping terminals, and other scenarios. It can be found in ATM machines, lockers, POS, and supermarket electronic scales in life. The printer uses a 5~9V wide voltage supply mode. The higher the voltage, the clearer the printing effect. It is suitable for thermal paper rolls with a width of 58MM and able to provide a print life of 50 kilometers. It supports Arduino, Raspberry Pi, and Windows System. We can refer to the instruction set and use the USB serial port or TTL communication interface to send corresponding commands to the thermal printer. Then the printer will instantly print out the text, characters, barcode, QR code, and even black and white pictures according to the instructions; we can connect it to the Arduino controller or the Raspberry Pi by a serial port. Combining with various sensors, we can DIY all kinds of practical instruments such as electronic scales, blood pressure index measuring instruments, soil element analyzers, and driving recorders. Besides, we can also make a small ticket printer of our own. The content on the small ticket can be defined by ourselves. After further development, we can even realize the remote printing function.

Embedded Thermal Printer - TTL Serial Communication Interface
Embedded Thermal Printer - TTL Serial Connection Diagram
  • The higher voltage of the embedded thermal printer, the faster printing speed, and the clearer handwriting of the printed documents (voltage range is 5~9V). At the same time, the normal operating current is between 0.8A and 1.5A. The instantaneous current can reach up to 2A. If the weather is cold, the operating current will need to be increased accordingly. The power consumption for printing graphics is generally large. If the printing ticket involves graphics, it is recommended to select the appropriate power supply.
  • To print characters like Chinese with Arduino, you need to create a C file, and it cannot be compiled under Arduino IDE (Chinese character cannot be input under the IDE development environment. The printout will be garbled even if you use the clipboard to paste these characters into input end). Then write the relevant array data into C file for calling.
  • USB interface supports computer system such as XP, win7, win8, and you need to install the driver on them before you can use it.


  • Operating Voltage: 5 ~ 9V (Recommend 9V)
  • Operating Current: 0.8 ~ 1.5A (instantaneous current ≈2A)
  • Communication interface: TTL + USB
  • Printing method: thermal dot matrix printing
  • Print color: black and white output
  • Resolution: 203 DPI (8 points / mm, 384 points per line)
  • Use consumables: thermal ticket roll
  • Paper roll specifications: paper roll width (58mm ± 0.5mm), paper roll diameter (30mm)
  • Print content: support printing of text, graphics, 1D barcode, QR code, curve, etc.
  • Print width: 48mm (effective print width)
  • Print life: 50 km
  • Printing speed: 60mm/s
  • Print characters: GB18030 Chinese character library (2424 international first and second level font), 1224 standard ASCII code, and can print 1-4 times for Chinese characters and characters
  • Working temperature: -20 ° C ~ 50 ° C
  • Relative humidity: 10-80%
  • Print order: ESC/POS compatible instruction set (see "Printer Instruction Set" for details)
  • Appearance size: 82 x 58 x 44 mm/3.23x2.28x1.73"
  • Installation size: 77 x 53 x 42 mm/3.03x2.08x1.65"


Project. AI-driven Dental Cast (Model) Classifier w/ Edge Impulse

Introduction: To extrapolate and interpret dental cast categories (classes) accurately, I needed to collect data from actual 3D-printed dental casts in order to train my object detection model with notable validity. Therefore, I purchased numerous dental cast STL files identified with different tags (labels) and printed them with my SLA (HALOT-ONE) and FDM (CR-200B) 3D printers.


Shipping List

  • Embedded Thermal Printer - TTL Serial x1
  • Embedded screw x2
  • Positioning slider x2
  • 2-pin power cable x1
  • 5-pin communication cable x1
  • USB data cable x1
  • Thermal paper roll x1
  • 5-pin communication cable DuPont connector x1




Embedded Thermal Printer - TTL Serial

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