{"product_id":"ch9121-serial-port-to-ethernet-converter-module-1","title":"CH9121 Serial Port To Ethernet Converter Module","description":"\u003cmeta name=\"description\" content=\"Buy CH9121 Serial Port To Ethernet Converter Module online in India at best price from The Engineer Store, Bengaluru. Authentic product, 7-day warranty on manufacturing defects, fast delivery across India.\"\u003e\n```html\n\u003ch1\u003eCH9121 Serial Port To Ethernet Converter Module\u003c\/h1\u003e\n\n\u003cp\u003eSeamlessly bridge your serial devices to Ethernet networks with the CH9121 Serial Port to Ethernet Converter Module. Built around the powerful WCH CH9121 chip, this compact module enables transparent bidirectional data conversion between UART (TTL) serial ports and 10\/100M Ethernet - ideal for remote monitoring, industrial automation, and IoT connectivity. Available now at The Engineer Store, Bengaluru, India.\u003c\/p\u003e\n\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003ctable\u003e\n\u003ctr\u003e\n\u003ctd\u003eChip\u003c\/td\u003e\n\u003ctd\u003eWCH CH9121\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFunction\u003c\/td\u003e\n\u003ctd\u003eSerial (UART TTL) to Ethernet Bidirectional Converter\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEthernet Standard\u003c\/td\u003e\n\u003ctd\u003e10\/100M Base-T (RJ45 with integrated transformer)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSerial Interface\u003c\/td\u003e\n\u003ctd\u003eDual UART (TTL level, 3.3V)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBaud Rate Support\u003c\/td\u003e\n\u003ctd\u003e300 bps to 921,600 bps\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNetwork Protocols\u003c\/td\u003e\n\u003ctd\u003eTCP\/IP, UDP, DHCP, ARP, ICMP, MAC RAW\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWorking Modes\u003c\/td\u003e\n\u003ctd\u003eTCP Server, TCP Client, UDP Server, UDP Client\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Voltage\u003c\/td\u003e\n\u003ctd\u003e3.3V DC (onboard 5V to 3.3V regulator available on some variants)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temperature\u003c\/td\u003e\n\u003ctd\u003e-40 degreesC to 85 degreesC (Industrial Grade)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003eCompact module form factor\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eConfiguration\u003c\/td\u003e\n\u003ctd\u003eVia serial AT commands or PC configuration tool\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eType\u003c\/td\u003e\n\u003ctd\u003eNetworking \/ Communication Converter Module\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOrigin\u003c\/td\u003e\n\u003ctd\u003eOriginal \/ Authentic\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWarranty\u003c\/td\u003e\n\u003ctd\u003e7-day warranty on manufacturing defects\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSupport\u003c\/td\u003e\n\u003ctd\u003eEmail \u0026amp; WhatsApp 24\/7\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDual UART Channels:\u003c\/strong\u003e Supports two independent serial ports for simultaneous communication with multiple devices.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e10\/100M Ethernet:\u003c\/strong\u003e Integrated RJ45 port with built-in transformer for reliable, high-speed wired network connectivity.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlexible Working Modes:\u003c\/strong\u003e Operates as TCP Server, TCP Client, UDP Server, or UDP Client to suit diverse networking topologies.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTransparent Transmission:\u003c\/strong\u003e Passes data transparently between serial and Ethernet without requiring protocol changes on your existing serial devices.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWide Baud Rate Range:\u003c\/strong\u003e Configurable from 300 bps up to 921,600 bps to match virtually any serial device.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEasy Configuration:\u003c\/strong\u003e Set up via simple serial AT commands or the free WCH PC-based configuration utility - no complex coding required.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIndustrial-Grade Temperature Range:\u003c\/strong\u003e Rated from -40 degreesC to 85 degreesC, ensuring reliable operation in harsh environments.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDHCP \u0026amp; Static IP:\u003c\/strong\u003e Supports both automatic IP assignment and static IP configuration for flexible network deployment.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompact Form Factor:\u003c\/strong\u003e Small footprint makes it easy to embed into existing enclosures and custom PCB designs.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLow Power Consumption:\u003c\/strong\u003e Energy-efficient design suitable for always-on applications and remote installations.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eWhy Choose The CH9121 Module from The Engineer Store?\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e100% authentic CH9121 modules sourced directly from trusted and authorized suppliers.\u003c\/li\u003e\n\u003cli\u003e1-5 day shipping, 7-8 day delivery across India from our Bengaluru warehouse.\u003c\/li\u003e\n\u003cli\u003eExpert technical support to help you with wiring, configuration, AT commands, and network setup.\u003c\/li\u003e\n\u003cli\u003eCompetitive pricing at just Rs.585 - exceptional value for a full-featured serial-to-Ethernet solution.\u003c\/li\u003e\n\u003cli\u003eTrusted by thousands of makers, engineers, and professionals across India.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eProject Ideas\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eRemote Industrial Monitoring:\u003c\/strong\u003e Connect legacy serial sensors, PLCs, or meters to your local network or cloud dashboard for real-time remote monitoring and data logging.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIoT Gateway:\u003c\/strong\u003e Use the CH9121 as a bridge to bring UART-based microcontrollers (Arduino, STM32, ESP32) onto a wired Ethernet network for stable, low-latency IoT communication.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSerial Device Server:\u003c\/strong\u003e Convert RS232\/TTL serial instruments (barcode scanners, weighing scales, GPS modules) into network-accessible devices shared across multiple computers.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHome Automation Hub:\u003c\/strong\u003e Network-enable serial-controlled relays, dimmers, and actuators for centralized smart home control over Ethernet.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMulti-Node Data Acquisition:\u003c\/strong\u003e Deploy multiple CH9121 modules across a facility to collect serial data from distributed sensors and aggregate it on a central server via Ethernet.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLearning \u0026amp; Education:\u003c\/strong\u003e An excellent hands-on module for students learning about TCP\/IP networking, UART communication, embedded systems, and network protocol fundamentals.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePoint-of-Sale (POS) Integration:\u003c\/strong\u003e Connect serial receipt printers, cash drawers, and display poles to modern Ethernet-based POS systems without expensive hardware upgrades.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eHow It Works\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eStep 1 - Connect:\u003c\/strong\u003e Wire your serial (UART TTL) device to the CH9121's TX\/R\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhen will I receive my order?\u003c\/summary\u003e\n\u003cp\u003eProducts ship within 1-5 days from our Bengaluru warehouse. Delivery within 7-8 days to most locations across India.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eIs technical support available?\u003c\/summary\u003e\n\u003cp\u003eYes, 24\/7 support via email and WhatsApp for setup, troubleshooting, and application guidance.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat is your return policy?\u003c\/summary\u003e\n\u003cp\u003e7-day returns on manufacturing defects only. Full refund or replacement. Not applicable for user damage or misuse.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eAre bulk discounts available?\u003c\/summary\u003e\n\u003cp\u003eYes, wholesale pricing on orders of 10+ units. Contact us via WhatsApp or email for a custom quote.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003ch2\u003eBuy CH9121 Serial Port To Ethernet Converter Module Online in India\u003c\/h2\u003e\n\u003cp\u003ePurchase the \u003cstrong\u003eCH9121 Serial Port To Ethernet Converter Module\u003c\/strong\u003e online at \u003ca href=\"https:\/\/theengineerstore.in\"\u003eThe Engineer Store\u003c\/a\u003e - India's most trusted electronics components store. We deliver across all major cities including Bengaluru, Mumbai, Delhi, Chennai, Hyderabad, Pune, Kolkata, Ahmedabad, Jaipur, and Surat. Get the best price on \u003cstrong\u003eCH9121 Serial Port To Ethernet Converter Module\u003c\/strong\u003e with fast 1-5 day shipping from our Bengaluru warehouse. All products are 100% authentic, sourced from authorized distributors with 7-day warranty on manufacturing defects.\u003c\/p\u003e\n\u003cp\u003eLooking to buy \u003cstrong\u003eCH9121 Serial Port To Ethernet Converter Module\u003c\/strong\u003e at the best price in India? The Engineer Store offers competitive pricing, bulk discounts for orders of 10+ units, and dedicated technical support via email and WhatsApp. Whether you are a hobbyist, student, or professional engineer, we have everything you need for your electronics projects.\u003c\/p\u003e","brand":"My Store","offers":[{"title":"Default Title","offer_id":44805579571363,"sku":"TES-EVWRIED11","price":620.1,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0628\/4479\/7091\/files\/ch9121-serial-port-to-eth-conerter-1-550x550w_9c1bdc72-d8cb-46b1-8da1-47b0514b6ce9.jpg?v=1720782004","url":"https:\/\/www.theengineerstore.in\/zh-hans\/products\/ch9121-serial-port-to-ethernet-converter-module-1","provider":"The Engineer Store","version":"1.0","type":"link"}