{"product_id":"rp203-mini-thermal-printer-with-rs232-ttl-for-arduino","title":"RP203 Mini Thermal Printer with RS232 \u0026 TTL for Arduino","description":"\u003ch1\u003eRP203 Mini Thermal Printer with RS232 and TTL for Arduino and Raspberry Pi\u003c\/h1\u003e\u003cp\u003eThe RP203 is a compact, low-power thermal printer designed for embedded and portable applications. With both RS232 and TTL serial interfaces, it connects directly to Arduino, Raspberry Pi, and other microcontrollers without complex drivers. No ink or ribbons are needed, making it clean, quiet, and reliable for printing receipts, logs, or labels.\u003c\/p\u003e\u003ch2\u003eKey Specifications\u003c\/h2\u003e\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003ePrint Speed\u003c\/td\u003e\n\u003ctd\u003e50 mm\/s max\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eResolution\u003c\/td\u003e\n\u003ctd\u003e203 DPI (8 dots\/mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePaper Width\u003c\/td\u003e\n\u003ctd\u003e58 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInterfaces\u003c\/td\u003e\n\u003ctd\u003eRS232, TTL serial (5V tolerant)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSupply Voltage\u003c\/td\u003e\n\u003ctd\u003e5–9V DC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003e110 x 70 x 60 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003ch2\u003eWhat You Can Build With This\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eDIY point-of-sale receipt printer for a shop or pop-up store\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/kit-soil-sensor-data-logger\"\u003ePortable data logger that outputs sensor readings on paper\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003eTicket printing system for events or raffles\u003c\/li\u003e\n\u003cli\u003eInventory label printer for stock management with small barcodes\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eCompatibility\u003c\/h2\u003e\u003cp\u003eThe TTL interface works directly with 5V Arduino boards like Uno and Mega. For 3.3V systems such as Raspberry Pi or ESP32, use a logic level shifter or ensure the RX pin is 5V tolerant. The RS232 port connects to standard DB9 serial ports on PCs or industrial equipment. It is not USB compatible without an adapter.\u003c\/p\u003e\u003ch2\u003eWiring Notes\u003c\/h2\u003e\u003cp\u003eFor TTL, connect the printer’s TX\/RX lines to your microcontroller’s serial pins and provide a stable DC supply. Always join ground from your controller to the printer’s ground. If using RS232, wire directly to a DE-9 connector with correct pinout; typically, pin 2 is RX, pin 3 is TX, and pin 5 is ground.\u003c\/p\u003e\u003ch2\u003eWhy Buy from Compoden\u003c\/h2\u003e\u003cp\u003eEvery component is sourced from verified suppliers and tested for compatibility before listing. We've spent 10 years building projects for makers, schools, and institutions across India. Ships from Bengaluru in 3-5 days. If defective on arrival, replace within 7 days.\u003c\/p\u003e\u003cdetails\u003e\u003csummary\u003eIs this compatible with Raspberry Pi?\u003c\/summary\u003e\u003cp\u003eYes, using the TTL interface. Connect the printer’s TX to Raspberry Pi’s RX (GPIO15) and RX to TX (GPIO14) via a level shifter, as the Pi’s pins are 3.3V not 5V tolerant. Then configure the serial port in your code.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eWhat type of paper does it use?\u003c\/summary\u003e\u003cp\u003eStandard 58mm thermal paper rolls are required. These are widely available and inexpensive. No ink is ever needed—the heat-sensitive paper darkens when heated.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eCan I print images or graphics?\u003c\/summary\u003e\u003cp\u003eYes, the printer supports bitmap printing through simple serial commands. You can convert images to monochrome bitmaps and send them line by line. Many libraries for Arduino and Python simplify this process.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdiv class=\"compoden-handoff\" style=\"margin-top:24px;padding:16px;background:#f0f4ff;border-left:4px solid #2B4D8F;border-radius:4px;\"\u003e\n  \u003cp style=\"margin:0 0 6px 0;font-weight:600;color:#1A3560;\"\u003e📦 Free Setup Handoff Document Included\u003c\/p\u003e\n  \u003cp style=\"margin:0;font-size:0.95em;color:#333;\"\u003eEvery Compoden order includes a free setup handoff document — step-by-step instructions to get your component working within minutes. Download it via QR code on your package. The handoff document is also trained to help you troubleshoot the majority of problems.\u003c\/p\u003e\n\u003c\/div\u003e\n","brand":"Compoden","offers":[{"title":"Default Title","offer_id":53444948197741,"sku":"CDN-0093","price":2050.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0999\/3997\/5533\/files\/image_1_30341f18-6b92-41ff-98ac-c0f1468a8897.jpg?v=1781512169","url":"https:\/\/compoden.com\/products\/rp203-mini-thermal-printer-with-rs232-ttl-for-arduino","provider":"Compoden","version":"1.0","type":"link"}