--- title: A Linux-based Rockchip RK3506B industrial controller... description: Luckfox Lyra PLC is a Linux-based industrial controller built around a Rockchip RK3506B tri-core Cortex-A7 SoC, offering dual Ethernet, WiFi 6, Bluetooth 5.2,... canonical: https://daily.dev/posts/a-linux-based-rockchip-rk3506b-industrial-controller-with-rs232-rs422-rs485-can-bus-and-relays-ccrutgrxe twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: A Linux-based Rockchip RK3506B industrial controller with RS232, RS422, RS485, CAN bus, and relays | daily.dev og:description: Luckfox Lyra PLC is a Linux-based industrial controller built around a Rockchip RK3506B tri-core Cortex-A7 SoC, offering dual Ethernet, WiFi 6, Bluetooth 5.2,... og:url: https://daily.dev/posts/a-linux-based-rockchip-rk3506b-industrial-controller-with-rs232-rs422-rs485-can-bus-and-relays-ccrutgrxe og:image: https://api.daily.dev/og/posts/cCRuTgrxE.png og:image:alt: A Linux-based Rockchip RK3506B industrial controller with RS232, RS422, RS485, CAN bus, and relays og:image:width: 1200 og:image:height: 630 og:locale: en --- > ## Documentation Index > Fetch the complete documentation index at: https://daily.dev/llms.txt > Use this file to discover all available pages before exploring further. # A Linux-based Rockchip RK3506B industrial controller with RS232, RS422, RS485, CAN bus, and relays **[CNX Software](https://daily.dev/sources/cnx-software)** · [@cnxsoft](https://daily.dev/cnxsoft) · 4 min read · 0 upvotes · 0 comments ## Summary Luckfox Lyra PLC is a Linux-based industrial controller built around a Rockchip RK3506B tri-core Cortex-A7 SoC, offering dual Ethernet, WiFi 6, Bluetooth 5.2, a 1.9-inch touchscreen, and industrial I/O including RS232, RS422/RS485, CAN bus, and two relays. It runs a Debian 12 image with Linux 6.1, supports Node-RED and OpenPLC, and is configured via a web dashboard covering networking, PLC logic, protocol bridges, and system settings. Priced from around $84-$101 depending on retailer, it positions itself as a low-cost alternative to other Linux PLCs like the Raspberry Pi-based Industrial Shields controller and OpenEmbed EdgeLogix-1145. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: ## Questions this post answers ### What industrial I/O interfaces does the Luckfox Lyra PLC support? The Luckfox Lyra PLC provides one RS232 port, one shared RS422/RS485 port, one CAN bus interface, and two relays (one Normally Open, one Normally Closed) rated up to 10A at 250V AC or 30V DC, exposed through two 11-pole terminal blocks, plus additional I2C and GPIO connectors. _Developers comparing industrial PLC boards can track new hardware releases like this on daily.dev._ ### What software does the Luckfox Lyra PLC run and what can be installed on it? It ships with a Debian 12-based OS image running Linux 6.1, configured through a web dashboard covering networking, files, logs, terminal access, and PLC-specific functions. Users can install Node-RED and OpenPLC, and the system supports MQTT, TCP, UDP, and HTTP for data publishing, plus CAN-to-serial, CAN-to-Ethernet, and serial-to-Ethernet gateway bridging. _Engineers evaluating Linux-based PLC software stacks can follow embedded Linux news via daily.dev._ ### How much does the Luckfox Lyra PLC cost and where can it be bought? It was first listed on AliExpress for $100.99 (or $107.99 with a PoE module), and is also sold through the Waveshare store for $83.99 to $89.99 and on Amazon. Rockchip prohibits sales or technical support to Russia, Belarus, Cuba, Iran, North Korea, Syria, Crimea, and the Donetsk and Luhansk regions of Ukraine. _Buyers weighing low-cost industrial controllers can keep tabs on pricing and availability through daily.dev._ ## Similar posts on daily.dev - [An industrial IoT ESP32-S3 PLC with Ethernet, RS232, RS485, CAN Bus, DIN Rail support](https://daily.dev/posts/an-industrial-iot-esp32-s3-plc-with-ethernet-rs232-rs485-can-bus-din-rail-support-wxy9yv7tc) · CNX Software · 0 upvotes · 0 comments - [Forlinx launches Rockchip RK3572 system-on-module \(SoM\) and development board with Linux 6.12 BSP](https://daily.dev/posts/forlinx-launches-rockchip-rk3572-system-on-module-som-and-development-board-with-linux-6-12-bsp-gqhrhow6s) · CNX Software · 1 upvotes · 0 comments - [This Tiny SBC Lets You Swap Interface Modules for Voice, Vision or Sensing](https://daily.dev/posts/this-tiny-sbc-lets-you-swap-interface-modules-for-voice-vision-or-sensing-scmsawzzq) · It's Foss · 0 upvotes · 0 comments - [Luxonis M8 Controller Box adds industrial I/Os, CAN Bus, and relay control to OAK4 AI vision cameras](https://daily.dev/posts/luxonis-m8-controller-box-adds-industrial-i-os-can-bus-and-relay-control-to-oak4-ai-vision-cameras-pminark3p) · CNX Software · 0 upvotes · 0 comments - [PLCnext ROS Bridge: Enabling Hardware Interoperability Between Industrial PLCs and ROS — ROS-Industrial](https://daily.dev/posts/plcnext-ros-bridge-enabling-hardware-interoperability-between-industrial-plcs-and-ros-ros-industr-rrqkk4amg) · ROS industrial · 1 upvotes · 0 comments --- Tags: [#hardware](https://daily.dev/tags/hardware), [#iot](https://daily.dev/tags/iot), [#embedded](https://daily.dev/tags/embedded) [View this post on daily.dev](https://daily.dev/posts/a-linux-based-rockchip-rk3506b-industrial-controller-with-rs232-rs422-rs485-can-bus-and-relays-ccrutgrxe) ```json {"@context":"https://schema.org","@graph":[{"@type":"Organization","@id":"https://daily.dev/#organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180},"sameAs":["https://twitter.com/dailydotdev","https://github.com/dailydotdev","https://www.linkedin.com/company/daily-dev-ltd"]},{"@type":"WebSite","@id":"https://daily.dev/#website","url":"https://daily.dev","name":"daily.dev","publisher":{"@id":"https://daily.dev/#organization"},"potentialAction":{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https://daily.dev/search?q={search_term_string}"},"query-input":"required name=search_term_string"}}]} {"@context":"https://schema.org","@type":"TechArticle","headline":"A Linux-based Rockchip RK3506B industrial controller with RS232, RS422, RS485, CAN bus, and relays","url":"https://daily.dev/posts/a-linux-based-rockchip-rk3506b-industrial-controller-with-rs232-rs422-rs485-can-bus-and-relays-ccrutgrxe","mainEntityOfPage":{"@type":"WebPage","@id":"https://daily.dev/posts/a-linux-based-rockchip-rk3506b-industrial-controller-with-rs232-rs422-rs485-can-bus-and-relays-ccrutgrxe"},"datePublished":"2026-08-17T05:15:06.413Z","dateModified":"2026-08-18T06:00:18.768Z","description":"Luckfox Lyra PLC is a Linux-based industrial controller built around a Rockchip RK3506B tri-core Cortex-A7 SoC, offering dual Ethernet, WiFi 6, Bluetooth 5.2,...","image":"https://media.daily.dev/image/upload/f_auto,q_auto/v1/posts/22b12eda0c37274099a9484f38e8981a?_a=AQAEuop","thumbnailUrl":"https://media.daily.dev/image/upload/f_auto,q_auto/v1/posts/22b12eda0c37274099a9484f38e8981a?_a=AQAEuop","isAccessibleForFree":true,"articleSection":"CNX Software","inLanguage":"en","publisher":{"@type":"Organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180}},"author":{"@type":"Person","name":"CNXSoft","url":"https://daily.dev/cnxsoft","image":"https://avatars.githubusercontent.com/u/1366138?v=4","interactionStatistic":{"@type":"InteractionCounter","interactionType":{"@type":"EndorseAction"},"userInteractionCount":520}},"commentCount":0,"discussionUrl":"https://daily.dev/posts/a-linux-based-rockchip-rk3506b-industrial-controller-with-rs232-rs422-rs485-can-bus-and-relays-ccrutgrxe","interactionStatistic":[{"@type":"InteractionCounter","interactionType":{"@type":"LikeAction"},"userInteractionCount":0},{"@type":"InteractionCounter","interactionType":{"@type":"CommentAction"},"userInteractionCount":0}],"keywords":"hardware,iot,embedded","timeRequired":"PT4M"} {"@context":"https://schema.org","@type":"BreadcrumbList","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https://daily.dev"},{"@type":"ListItem","position":2,"name":"CNX Software","item":"https://daily.dev/sources/cnx-software"},{"@type":"ListItem","position":3,"name":"A Linux-based Rockchip RK3506B industrial controller with RS232, RS422, RS485, CAN bus, and relays"}]} {"@context":"https://schema.org","@type":"FAQPage","@id":"https://daily.dev/posts/a-linux-based-rockchip-rk3506b-industrial-controller-with-rs232-rs422-rs485-can-bus-and-relays-ccrutgrxe#faq","mainEntity":[{"@type":"Question","name":"What industrial I/O interfaces does the Luckfox Lyra PLC support?","acceptedAnswer":{"@type":"Answer","text":"The Luckfox Lyra PLC provides one RS232 port, one shared RS422/RS485 port, one CAN bus interface, and two relays (one Normally Open, one Normally Closed) rated up to 10A at 250V AC or 30V DC, exposed through two 11-pole terminal blocks, plus additional I2C and GPIO connectors. 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