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A microprocessor development board is a printed circuit board containing a microprocessor and the minimal support logic needed for a computer engineer to become acquainted with the microprocessor on the board and to learn to program it. It also served users of the microprocessor as a method to prototype applications in products.

Unlike a general-purpose system such as a home computer, usually a development board contains little or no hardware dedicated to a user interface. It will have some provision to accept and run a user-supplied program, such as downloading a program through a serial port to flash memory, or some form of programmable memory in a socket in earlier systems.

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Building an IoT Monitoring System From a Raspberry Pi (part 1)

In this article, I go over how I built a humidity alert system that is being used to monitor temperature and humidity for hay farming. The idea is that when you bail hay, it needs to be during the night, and when the humidity is over 60%. Hay farmers tend to lose sleep waiting to see when the humidity is just right to go out and bail their hay. I was asked if I could build a device that would monitor conditions out in the field where the hay is on the ground waiting to be bailed and then send an alert to the farmer from these remote locations once optimum humidity is reached.