I picked up some pulse width modulation to voltage converter modules ... you can also use the following crude Arduino code or better code fragments to test this module. However, since the PWM outputs ...

A FT-232 USB to serial board is used to program the Arduino. A standard Bluetooth module has to have HID firmware installed. [Dastardly] makes a homemade daughterboard–er, shield–to connect ...

No doubt, an Arduino can convert your favorite pots into self-watering planters ... and a pre-wired soil moisture sensor module. The soil moisture sensor module , built around the LM393 comparator, ...