{"product_id":"2-channel-uart-to-ethernet-converter-ch9121","title":"2-Channel UART to Ethernet Converter (CH9121)","description":"\u003cp\u003eThe 2-Channel UART to Ethernet converter provides an easy way to communicate between UART TTL and RJ45 Ethernet, allowing bi-directional transparent data transmission.\u003c\/p\u003e\n\u003cp\u003eIt is easy to use and offers a fast data rate, low power consumption and high stability. It's ideal for applications such as safety \u0026amp; security, IoT and more.\u003c\/p\u003e\n\u003ch2\u003eFeatures\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eEmbedded Ethernet MAC and PHY layers\u003c\/li\u003e\n\u003cli\u003eBi-direction transparent data transmission between UART and Ethernet\u003c\/li\u003e\n\u003cli\u003e10\/100M, full-duplex\/half-duplex auto-negotiation Ethernet interface, 802.3-compliant\u003c\/li\u003e\n\u003cli\u003eAuto-MDI\/MDIX, detect and switch cable type automatically\u003c\/li\u003e\n\u003cli\u003eSupports DHCP auto-obtained IP and DNS domain access\u003c\/li\u003e\n\u003cli\u003eNetwork parameter configuration: chip operating mode, port, IP, via host computer software or UART command\u003c\/li\u003e\n\u003cli\u003eFour operating modes: TCP CLIENT, TCP SERVER, UDP CLIENT, UDP SERVER\u003c\/li\u003e\n\u003cli\u003e2-CH UART concurrent operation, standalone transparent transmission for each channel\u003c\/li\u003e\n\u003cli\u003eFull-duplex or half-duplex UART communication, supports RS485 RX\/TX auto switch\u003c\/li\u003e\n\u003cli\u003eSupports virtual serial port software (provided)\u003c\/li\u003e\n\u003cli\u003eKEEPALIVE mechanism support\u003c\/li\u003e\n\u003cli\u003eOnline development resources and manual\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eApplication Examples\u003c\/h2\u003e\n\u003cp\u003eBi-direction transparent transmission between UART TTL and wired Ethernet:\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0176\/3274\/files\/UART-to-ethernet-application-example-1_1.jpg?v=1641834671\u0026amp;width=700\" alt=\"2-Channel Ethernet to UART converter application example 1\"\u003e\u003c\/p\u003e\n\u003cp\u003eExtend communication distance for serial devices:\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0176\/3274\/files\/UART-to-ethernet-application-example-2_1.jpg?v=1641834774\u0026amp;width=700\" alt=\"2-Channel Ethernet to UART converter application example 2\"\u003e\u003c\/p\u003e\n\u003cp\u003eManage multiple serial client devices remotely via one webserver:\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0176\/3274\/files\/UART-to-ethernet-application-example-3_1.jpg?v=1641834874\u0026amp;width=700\" alt=\"2-Channel Ethernet to UART converter application example 3\"\u003e\u003c\/p\u003e\n\u003cp\u003eManage serial server remotely via multiple web clients:\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0176\/3274\/files\/UART-to-ethernet-application-example-4_1.jpg?v=1641834975\u0026amp;width=700\" alt=\"2-Channel Ethernet to UART converter application example 4\"\u003e\u003c\/p\u003e\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eOperating voltage:3.3V\/5V\u003c\/li\u003e\n\u003cli\u003eOperating current: 140mA\u003c\/li\u003e\n\u003cli\u003eOperating mode: TCP\/UDP\u003c\/li\u003e\n\u003cli\u003eUART baud rate: 300bps !921.6Kbps\u003c\/li\u003e\n\u003cli\u003eUART TTL level: 3.3V\/5V compatible\u003c\/li\u003e\n\u003cli\u003eStorage temperature: -55°C ~ 125°C\u003c\/li\u003e\n\u003cli\u003eOperating temperature: -40°C ~ 85°C\u003c\/li\u003e\n\u003cli\u003eDimensions: 53.00 x 22.00mm\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eWhat's Onboard?\u003c\/h2\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0176\/3274\/files\/UART-to-ethernet-module-onboard-features_1.jpg?v=1641835047\u0026amp;width=700\" alt=\"UART to Ethernet module onboard features\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e1)\u003c\/strong\u003e UART 1 connection status indicator\u003cbr\u003e\u003cstrong\u003e2)\u003c\/strong\u003e UART 2 connection status indicator\u003cbr\u003e\u003cstrong\u003e3)\u003c\/strong\u003e Power indicator\u003cbr\u003e\u003cstrong\u003e4)\u003c\/strong\u003e CH9121 control pins\u003cbr\u003e\u003cstrong\u003e5)\u003c\/strong\u003e CH9121 driver\u003cbr\u003e\u003cstrong\u003e6)\u003c\/strong\u003e AMS1117-3.3V power supply IC\u003cbr\u003e\u003cstrong\u003e7)\u003c\/strong\u003e RT9193-18GB power supply IC\u003cbr\u003e\u003cstrong\u003e8)\u003c\/strong\u003e Ethernet port\u003c\/p\u003e\n\u003ch2\u003ePackage Contents\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e1x 2-Channel UART to Ethernet Converter\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eResources\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\nProduct Wiki (includes most of the below info and more)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003ePinout\u003c\/h3\u003e\n\u003ctable style=\"width: 534px;\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 132.688px;\"\u003e5V\/3V3\u003c\/td\u003e\n\u003ctd style=\"width: 383.312px;\"\u003ePower positive, use any pin of 5V\/3.3V pins for power supply\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 132.688px;\"\u003eGND\u003c\/td\u003e\n\u003ctd style=\"width: 383.312px;\"\u003eGround\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 132.688px;\"\u003eRST1\u003c\/td\u003e\n\u003ctd style=\"width: 383.312px;\"\u003eExternal reset input, low active\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 132.688px;\"\u003eRESET\u003c\/td\u003e\n\u003ctd style=\"width: 383.312px;\"\u003eRestore to factory setting, detected when chip power on, low active\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 132.688px;\"\u003eTXD1\u003c\/td\u003e\n\u003ctd style=\"width: 383.312px;\"\u003eAsynchronous UART 1 data output (enabled by default)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 132.688px;\"\u003eTXD2\u003c\/td\u003e\n\u003ctd style=\"width: 383.312px;\"\u003eAsynchronous UART 2 data output (disabled by default)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 132.688px;\"\u003eRXD1\u003c\/td\u003e\n\u003ctd style=\"width: 383.312px;\"\u003eAsynchronous UART 1 data input (enabled by default)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 132.688px;\"\u003eRXD2\u003c\/td\u003e\n\u003ctd style=\"width: 383.312px;\"\u003eAsynchronous UART 2 data input (disabled by default)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 132.688px;\"\u003eCFG0\u003c\/td\u003e\n\u003ctd style=\"width: 383.312px;\"\u003eUART config mode, low level to enter configuration, high level to exit configuration\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 132.688px;\"\u003eRUN\u003c\/td\u003e\n\u003ctd style=\"width: 383.312px;\"\u003eOperating status indicating pin\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 132.688px;\"\u003eDIR1\u003c\/td\u003e\n\u003ctd style=\"width: 383.312px;\"\u003eUART 1 RS485 RX\/TX switch (connects to external RS485 controller)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 132.688px;\"\u003eDIR2\u003c\/td\u003e\n\u003ctd style=\"width: 383.312px;\"\u003eUART 2 RS485 RX\/TX switch (connects to external RS485 controller)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eDefault Configuration\u003c\/h3\u003e\n\u003cp\u003eThe UART2 is disabled, UART1 works in TCP CLIENT mode by default. The default setting of ETH is as below:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eDevice IP:192.168.1.200\u003c\/li\u003e\n\u003cli\u003eSubnet Mask: 255.255.255.0\u003c\/li\u003e\n\u003cli\u003eGateway: 192.168.1.1\u003c\/li\u003e\n\u003cli\u003eDevice Port: 2000\u003c\/li\u003e\n\u003cli\u003eTarget IP: 192.168.1.100\u003c\/li\u003e\n\u003cli\u003eTarget port: 1000\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThe default setting of the UART1 is as below:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eBaud rate: 9600\u003c\/li\u003e\n\u003cli\u003eTimeout: 0\u003c\/li\u003e\n\u003cli\u003edata bit: 8\u003c\/li\u003e\n\u003cli\u003eStop bit: 1\u003c\/li\u003e\n\u003cli\u003eParity: None\u003c\/li\u003e\n\u003cli\u003eClearing buffer: Never\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eAbout the CH9121\u003c\/h3\u003e\n\u003cp\u003eThe CH9121 is a network serial port transparent transmission chip, which can realise two-way transparent transmission of serial data and network data.\u003c\/p\u003e\n\u003cp\u003eIt supports 4 working modes of TCP CLIENT\/SERVER, UDP CLIENT\/SERVER, and the serial port baud rate support range is 300bps～921600bps, which needs to be configured before use.\u003c\/p\u003e\n\u003cp\u003eThe host computer software NetModuleConfig.exe or serial command configures the network parameters and serial parameters of the chip. After the configuration is completed, CH9121 will save the configuration parameters to the internal storage space. After the chip is reset, CH9121 will work according to the saved configuration values.\u003c\/p\u003e","brand":"Waveshare","offers":[{"title":"Default Title","offer_id":48624281419994,"sku":"edx1789688736767","price":11.63,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0824\/8318\/3834\/files\/2-channel-uart-to-ethernet-converter-ch9121_1.jpg?v=1789688741","url":"https:\/\/memoryfoamwear.shop\/products\/2-channel-uart-to-ethernet-converter-ch9121","provider":"My Store","version":"1.0","type":"link"}