relay News - CNX Software - Embedded Systems News

September 19, 2025September 20, 2025 by Jean-Luc Aufranc (CNXSoft) - 2 Comments

Olimex ESP32-C5-EVB – A dual-band WiFi 6 IoT board with relays, opto-isolated inputs, LiPo battery support

Olimex ESP32-C5-EVB is an evaluation board built around Espressif’s ESP32-C5-WROOM-N8R4 module with dual-band (2.4/5.0GHz) WiFi 6, Bluetooth 5.0 LE, and 802.15.4 (Zigbee/Thread/Matter) wireless connectivity, 8MB flash, and 4MB PSRAM. The board integrates two relays rated 250V/10A, two opto-isolated inputs, and a LiPo UPS charger and step-up converter. Other features include USB-C ports, a UEXT connector for expansion, and two buttons. It’s one of the first ESP32-C5 boards we’ve seen, after Espressif’s own ESP32-C5-DevKitC-1 development kit, and Wireless Tag’s WT99P4C5-S1 board using the ESP32-C5 as a wireless co-processor to the ESP32-P4 MCU. Olimex ESP32-C5-EVB specifications: Wireless module – ESP32-C5-WROOM-N8R4 SoC – Espressif Systems ESP32-C5 CPU Single-core 32-bit RISC-V processor @ up to 240 MHz Low-power RISC-V core @ 40 MHz acting as the main processor for power-sensitive applications Memory – 384 KB SRAM on-chip, support for external PSRAM Storage – 320 KB ROM, support for external flash Connectivity Dual-band 802.11ax WiFi 6 […]

September 12, 2025 by Jean-Luc Aufranc (CNXSoft) - 1 Comment

WiFIRCard – A credit card-sized WiFi and IR-controlled dual relay board (Crowdfunding)

WiFIRCard is a credit card-sized ESP32-S3 board designed for home automation with two relays and a few GPIOs (headers and screw terminals) that can be controlled over WiFi 4 or an IR (infrared) remote control. The board also features a microSD card slot for data logging or other storage uses, a buzzer for audio feedback, a USB-C port for power and programming, and a few buttons and LEDs. WiFiRCard specifications: Wireless module – ESP32-S3-WROOM-1 with Xtensa® LX7 dual-core 32-bit SoC – Espressif Systems ESP32-S3 CPU – Dual-core Tensilica LX7 up to 240 MHz with vector extension for AI/ML workloads RAM – 512KB SRAM, up to 8MB PSRAM Storage – Up to 16MB flash Wireless – WiFi 4 and Bluetooth LE 5 Antenna – PCB antenna Storage – MicroSD card slot for data logging/storage USB – 1x USB Type-C port for power and programming Relays 2x HLS8L-DC5V-S-C relays 10A/250V AC, 15A/120V AC, […]

July 30, 2025 by Debashis Das - 1 Comment

DIN rail-compatible industrial relay board features 4 outputs, 4 analog/digital inputs, RS-485 interface

The ESC3B04 is a compact DIN rail-compatible relay board built around the ESP32-C3 Super Mini module for building Wi-Fi remote switches, voltage monitoring systems, motor control, timed automation, and RS-485-based setups. The board features four 10A relay outputs, four 0–5V/10V analog voltage inputs (also configurable as 12–24V PNP digital inputs), an RS-485 interface, and a push-button input. It operates on a 7–25V DC supply and supports direct installation in control panels or DIN-rail enclosures. ESC3B04 relay board specifications: Wireless module –16-pin ESP32-C3 Super Mini module SoC – Espressif Systems ESP32-C3FH4, single-core 32-bit RISC-V microcontroller @ up to 160 MHz; 400 KB SRAM; 4MB flash USB – 1x USB Type-C port for programming Ceramic antenna I/Os and expansion 4x relays (10A/240VAC) 4x 0-5V/0-10V analog voltage inputs (can be used as 12-24V digital inputs) Serial – RS-485 interface for Modbus or custom protocol communication Misc User button Power LED Power Supply 7-25V […]

July 25, 2025 by Debashis Das - 2 Comments

Industrial LoRa remote switches offer 3.5km range, real-time feedback

CDEBYTE EWD22S series industrial LoRa remote switchs

The CDEBYTE EWD22S series is a set of LoRa-based remote control switches designed for long-range industrial applications. The three key products of the series include the EWD22S-A01TR and EWD22S-D02XR relay modules, and the EWD22S-YK02A handheld remote. The EWD22S-A01TR module handles up to 30A/5kW loads, while the EWD22S-D02XR handles up to 10A/1kW. The EWD22S-YK02A handheld remote can be paired with the relay modules to control them remotely. The remote includes a 9V battery, a high-gain antenna, and multi-color LED indicators for signal confirmation, fault detection, and low battery alerts. The solution relies on LoRa in the 410–493MHz frequency band and offers a range of up to 3.5km in open environments. Protection features include zero-crossing detection, power isolation, and flame-retardant housing. The PCB features a tri-proof coating for protection against humidity, mold, and salt spray. Both relay modules support DIN rail and a screw mounting option for easy installation. EWD22S series specifications: Wireless […]

July 11, 2025 by Jean-Luc Aufranc (CNXSoft) - 1 Comment

Industrial 6-Channel RP2350 relay module offers RS485 interface, Raspberry Pi Pico HAT support

Waveshare RP2350-Relay-6CH is a Raspberry Pi RP2350-based industrial 6-channel relay module with an isolated RS485 interface, 7 to 36V DC input via a terminal block, and support for Raspberry Pi Pico HATs. Each relay is isolated and can handle 250VAC/30VDC up to 10A, a USB-C port is used for firmware updates, and the module also includes a buzzer, a few LEDs, as well as Reset and BOOT buttons, with everything housed in a DIN-Rail enclosure. Waveshare RP2350-Relay-6CH specifications: Microcontroller – Raspberry Pi RP2350B CPU Dual-core Arm Cortex-M33 @ 150 MHz with Arm Trustzone, Secure boot OR Dual-core RISC-V Hazard3 @ 150 MHz Either two cores can be used. Memory – 520 KB on-chip SRAM Package – QFN-80 Relay – 6x relays Contact rating – ≤10A 250VAC/30VDC Contact form – 1NO 1NC via screw terminals Optocoupler isolation USB – USB Type-C port for power, data, and firmware flashing Serial Isolated RS485 […]

June 2, 2025June 3, 2025 by Jean-Luc Aufranc (CNXSoft) - 4 Comments

ESP32-P4 Smart 86 Box features 4-inch square touch display for Smart Home and IIoT applications

Designed for Smart Home or industrial IoT (IIoT) applications, Waveshare’s ESP32-P4 Smart 86 Box is equipped with a 4-inch square touchscreen display, an ESP32-C6 module with WiFi 6 and Bluetooth connectivity, and a range of connectors. Two models are offered: the ESP32-P4-WIFI6-Touch-LCD-4B with a MIPI CSI camera connector and a 28-pin GPIO header, and the ESP32-P4-86-Panel-ETH-2RO with a bottom board that features an RS485 serial interface, two relays, a 10/100Mbps Ethernet RJ45 connector, and 6V-30V DC input. ESP32-P4 Smart 86 Box specifications: Main module – ESP32-P4-Core Module Microcontroller – ESP32-P4NRW32 MCU Dual-core RISC-V microcontroller @ 400 MHz with AI instructions extension and single-precision FPU Single-RISC-V LP (Low-power) MCU core @ up to 40 MHz GPU – 2D Pixel Processing Accelerator (PPA) VPU – H.264 and JPEG codecs support Memory – 768 KB HP L2MEM, 32 KB LP SRAM, 8 KB TCM, 32MB PSRAM Storage – 128 KB HP ROM, 16 […]

May 12, 2025 by Jean-Luc Aufranc (CNXSoft) - 7 Comments

Luckfox-Pico-86-Panel – An 86-type Smart Home controller with a 4-inch display, Ethernet, RS485, two relays

Luckfox-Pico-86-Panel is a Smart Home controller powered by a Rockchip RV1106G2 or RV1106G63 SoC with 128MB or 256MB DDR3L and equipped with a 4-inch touchscreen display that fits into a standard 86-type junction box. The Linux device supports Ethernet, WiFi 6, and Bluetooth 5.2 LE connectivity and features terminal blocks for 6 to 30V DC input, RS485, and two relays. The controller includes a speaker and microphone for Smart Audio applications, and a USB-C port for programming and debugging. Luckfox-Pico-86-Panel specifications: SoC – Rockchip RV1106G2/G3 CPU – Arm Cortex A7 @ 1.2GHz with an integrated RISC-V co-processor. NPU 4th-gen Rockchip NPU with hybrid quantization (int4, int8, int16) 0.5 TOPS (RV1106G2) or 1 TOPS (RV1106G3) ISP – 3rd-gen 5MP high-performance ISP VPU – 3072×1728 (5M) @ 30fps H.265/H.264 encoding, 16M @ 60FPS JPEG snapshot System Memory – 128MB (RV1106G2) or 256MB (RV1106G3) DDR3L memory Storage – 8GB eMMC flash storage Display – 4-inch 5-point […]

March 10, 2025March 10, 2025 by Debashis Das - 6 Comments

ESP32-S3 based AC voltage controller/dimmer features a knob with integrated display

Makerfabs has recently introduced Matouch 1.28-inch ToolSet_AC Dimmer an open-source ESP32-based AC voltage controller for dimming lights or adjusting motor speeds using phase-cut dimming. Built around an ESP32-S3 wireless MCU, it features a 1.28” capacitive touch display (240×240), and a UI designed with LVGL/Squareline and the Arduino V2.3.4 IDE. The device relies on a BT139 Triac and a zero-cross detection circuit for precise AC voltage control, along with an onboard relay to enable a full AC on/off switch. With an integrated AC-DC module providing 5V @ 0.6A, it can operate within an input range of AC 100-240V, 50Hz-60Hz, with a maximum load of 10A at 240VAC. Designed for home and industrial applications, it can control lighting environments and electrical appliances while being open-source for customization and integration into various automation projects. Matouch 1.28-inch ToolSet_AC Dimmer specifications: SoC – Espressif Systems ESP32-S3 CPU – Xtensa® Dual-core 32-bit LX7 Microprocessor with up to 240MHz […]