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A comment on A Look at Embedded WiFi Development Boards. Parent comment

Re:A Look at Embedded WiFi Development Boards by technomancy on Thursday August 13, 2015 @02:33AM (#10052558)
> Why would one use a Raspi or Arduino to read out some moisture-meter if it can be done with a 3 dollar hardware piece the size of a fingernail?

The article states that it lacks analog input, so that might be a good reason.

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Re:A Look at Embedded WiFi Development Boards by bjpirt on Thursday August 13, 2015 @05:35AM (#10053034)
The article is wrong (at least partially!) - the module they used (the ESP-01) only has a limited number of pins brought out, but the chip itself has a 10 bit ADC on board and there are plenty of modules that bring out the pins. I've been using lots of ESP-12 modules and they're great
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