Maker and IoT Ideas
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I2C IO Card for ESP-12E I2C Base Card

Another expander peripheral for my ESP-12E I2C Base Card

IntermediateProtip2 hours109
I2C IO Card for ESP-12E I2C Base Card

Things used in this project

Hardware components

PCBWay Custom PCB
PCBWay Custom PCB
×1

Story

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Schematics

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Schematic Page 2

Code

Code intructions

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Using standard Arduino Language in Arduino IDE/PlatformIO or similar

With Wire.h library
Write a 0 to the respective GPIO to activate the relay, for example

wire.write(0b11111100); 

will turn on both relays

Credits

Maker and IoT Ideas

Maker and IoT Ideas

96 projects • 25 followers
I design custom PCB solutions, usually with an IoT or Automation twist, to solve problems in my daily life. Sometimes also for other people.

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