The Quad delay card in credit card size leads Tasmota firmware on the ESP32 module (crowdfunding)

The “ESP32 IoT Relay Board” is an ESP32 board in credit card size with four small 250 VAC/30VDC 7A seasons, in which Tasmota Open-Source firmware is carried out and Alexa & Google Assistant supports language control.

There are so many ESP32-based relay on the market that I usually don't have the need to cover new ones, but Igor Mileshin's ESP32-IoT relay board is smaller than most, so I thought that it could be interesting for some. The smallest quad channel relay board that I have seen so far is that from Seed Studio with an STM32 MCU and solid relay, which measures only 60 x 40 mm, but only support the relays up to 2a.

ESP32 IoT Relay Board Specifications:

• Wireless module ESP32-WAOM-32D
  • SOC-ESPRESSIF ESP32-D0WD Dual-Core Tensilica LX6 processor at 240 MHz
  • Storage – 32Mbit Spi Blitz
  • Connectivity-Wi-Fi 802.11 B/g/n up to 150 Mbit/s, Bluetooth 4.2/5.x Le
• Sacrifice
  • 4x “industrial” relay that support 7a / 250 VAC; 7a / 30VDC (precise partial name not provided, but it looks like Hongfa Hf46f-G)
  • Connection via screw terminals
• USB-1x USB-C connection for programming and debugging
• Expansion
  • Two header for 12x GPIO
  • 1x I2C header
• Misery
  • Power led
  • 4x relay status -Leds
  • Boot button
• Power supply 5V DC via USB Type-C connection
• Dimensions – 80 x 50 mm

Users can program the board with Arduino, ESP IDF or micropythonOr simply perform Tasmota Open Source firmware because it is compatible with the board and the support of Alexa and Google assistant is integrated. There is also a GitHub repo, but I was told that it is in development, and at the moment there are only Arduino and Mirophython samples that can be switched on and off in a loop.

I don't see any security certifications, Open the PCB route with Improved soldering maskingIt maximizes the current flow and ensures a reliable performance under high load conditions. “You can see the board in action in the video below.

The ESP32-IoT relay of credit card size is now listed in Kickstarter with an already exceeded financing goal of $ 2,000. The rewards start at 29 US dollars for the “Early Bird Special” Perk Limited on 50 pieces, and the MSRP after crowdfunding campaign should be 45 US dollars. Shipping adds 20 US dollars and 25 US dollars to the rest of the world, and supporters should expect that the rewards will be sent by May 2025 if everything runs according to the plans.

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