A pin expander shield for the D1 Mini ESP8266 boardsDesigned by Radomir Dopieralski in Switzerland
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What is it? It's a shield with an MCP23017 pin expander on it. It connects to your board through the I2C bus, and lets you have additional 16 digital pins. The address selection jumpers let you stack…Read More…
It's a shield with an MCP23017 pin expander on it. It connects to your board through the I2C bus, and lets you have additional 16 digital pins. The address selection jumpers let you stack up to 8 such shields at once, for a total of 128 extra pins!
The ESP8266 is a very nice chip, and I especially like the D1 Mini development boards, however, they always have too few digital pins to do anything more advanced. This shield makes it very easy to expand the capabilities of this little board.
It's small, it stacks, it fits the D1 Mini and any compatible board, and it's very convenient to use.
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Since most products in my store cost less than proper shipping, I'm sending them in regular letters by default: there is no tracking, and it can take several weeks for it to arrive. If un-tracked packages are known to mysteriously disappear in your country, or if you are in a hurry, please select the option with tracking — it will be sent as a registered letter then.
Nicolai | May 6, 2019
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