{"product_id":"max485-rs-485-transceiver-module-for-arduino-microcontrollers","title":"MAX485 RS-485 Transceiver Module for Arduino \u0026 Microcontrollers","description":"\u003ch1\u003eMAX485 RS-485 Transceiver Module (5V, Half-Duplex, 2.5Mbps)\u003c\/h1\u003e\n\n\u003cp\u003eThe MAX485 is an RS-485 transceiver module that converts UART TTL signals to balanced RS-485 differential signals. It enables long-distance serial communication up to 1200 meters at reduced speeds, making it ideal for industrial control, sensor networks, and multi-drop systems. The module operates at 5V and supports half-duplex communication with up to 32 transceivers on the same bus.\u003c\/p\u003e\n\n\u003ch2\u003eKey Specifications\u003c\/h2\u003e\n\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\u003eOperating Voltage\u003c\/td\u003e\n\u003ctd\u003e5V DC\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eData Rate\u003c\/td\u003e\n\u003ctd\u003eUp to 2.5 Mbps\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eDuplex\u003c\/td\u003e\n\u003ctd\u003eHalf-duplex\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eMax Communication Distance\u003c\/td\u003e\n\u003ctd\u003e1200 meters (at lower speeds)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eTransceivers on Bus\u003c\/td\u003e\n\u003ctd\u003eUp to 32\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eLogic Level Voltage\u003c\/td\u003e\n\u003ctd\u003e5V (TTL)\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eWhat You Can Build With This\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/kit-zigbee-temperature-sensor-network\"\u003eIndustrial sensor network for temperature and humidity monitoring over long distances\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003eDMX512 lighting controller for stage and architectural lighting\u003c\/li\u003e\n  \u003cli\u003eMulti-master Arduino communication system for home automation\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/esp8266-d1-mini-data-logging-project-kit\"\u003eRemote data logging station using RS-485 soil sensors\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eCompatibility\u003c\/h2\u003e\n\u003cp\u003eThis module works directly with 5V microcontrollers like Arduino Uno and Mega. It can interface with 3.3V boards (ESP32, Raspberry Pi) using logic level shifting or by ensuring the module's 5V tolerant inputs. Common pairings include additional MAX485 modules for multi-device buses or USB-to-RS-485 converters for PC communication.\u003c\/p\u003e\n\n\u003ch2\u003eWiring Notes\u003c\/h2\u003e\n\u003cp\u003eConnect DI to the microcontroller's TX pin, RO to RX, and tie a common ground between all devices on the bus. For half-duplex operation, connect DE and RE pins together and control them with a single GPIO to switch between transmit and receive. Use 120-ohm termination resistors at both ends of the bus to minimize signal reflections on long cables.\u003c\/p\u003e\n\n\u003ch2\u003eWhy Buy from Compoden\u003c\/h2\u003e\n\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\n\n\u003cdetails\u003e\u003csummary\u003eIs this compatible with Arduino?\u003c\/summary\u003e\u003cp\u003eYes, the MAX485 connects to an Arduino's UART pins (D0\/RX and D1\/TX on Uno) and a digital pin for DE\/RE control. Use the SoftwareSerial library if you need to keep the hardware serial free for programming.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eWhat is the maximum cable length?\u003c\/summary\u003e\u003cp\u003eThe module can communicate up to 1200 meters at low data rates (e.g., 100 kbps). At the maximum data rate of 2.5 Mbps, cable length should be reduced to under 30 meters. Always use twisted-pair cable for best performance.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eDoes this module include termination resistors?\u003c\/summary\u003e\u003cp\u003eMost MAX485 module PCBs have a 120-ohm termination resistor footprint (often labeled R7) but it is usually not pre-soldered. You can add a 120-ohm through-hole resistor across the A\/B lines if your bus requires termination.\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":53445083070829,"sku":"CDN-0946","price":180.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0999\/3997\/5533\/files\/image_1_98db118c-47e9-4540-90d0-3eb7103f12c8.jpg?v=1781513202","url":"https:\/\/compoden.com\/products\/max485-rs-485-transceiver-module-for-arduino-microcontrollers","provider":"Compoden","version":"1.0","type":"link"}