WiFIRCard – ESP32-S3 home automation board with relays, IR, and MicroSD for logging

WiFIRCard is a credit card-sized ESP32-S3 board designed for home automation, featuring dual relays and supporting both WiFi 4 and IR remote control. It targets DIY users and smart home setups where devices can be switched over the network or using an infrared controller, offering a compact alternative to typical relay modules.

The board integrates two 10A/250V AC opto-isolated relays with screw terminal access, a microSD slot for logging, a buzzer, USB-C for power/programming, IR receiver with learning support, and expansion GPIOs via headers and terminals. With various platfrom support, compact size and $39 price point its suitable for various applications.

WiFIRCard home automation board specifications:

• SoC: ESP32-S3-WROOM-1 with Espressif ESP32-S3 SoC
  • CPU: Dual-core Tensilica LX7 up to 240 MHz with vector extensions (AI/ML capable)
  • Memory: 512 KB SRAM, up to 8 MB PSRAM
  • Storage: Up to 16 MB flash
  • Connectivity: WiFi 4 (802.11 b/g/n) and Bluetooth LE 5
  • Antenna: On-board PCB antenna
• Storage: microSD card slot for logging or extra storage
• IR Control: Onboard IR receiver with remote learning & emulation (TV, AC, etc.)
• Relay Outputs
  • 2x onboard relays with NO/COM/NC screw terminals
  • Opto-isolated design for safety
  • Supports up to 10 A switching (250 VAC / 125 VAC for AC loads, 24 V DC for DC loads)
  • Reinforced PCB tracks & solder masking for high-load durability
• I/O Expansion
  • ESP32 GPIOs broken out to screw terminals & header pins
  • 2x programmable LEDs and onboard buzzer for feedback
• Safety Features: Isolation protection between high-voltage and low-voltage tracks, opto-isolated relay design
• Power Supply – 5 V input via USB-C or screw terminal
• Dimensions – 85 mm x 56mm (credit card form factor)

The board can be programmed with Arduino, MicroPython, and CircuitPythonwith SDKs and libraries provided by the company. On top of that theres also supports for Alexa, Google Assistant, Home Assistant, MQTT, Blynk, and OTA updates.

The Module is available on Kickstarter where the €1,200 goal has already been passed. Early Bird WiFIRCard starts at $39 (€33), with 2, 4, and 8-board bundles also available. Shipping is $19 (€16), with deliveries set for November 2025.