What are your favorite sensors you'd like to use with Flutter?

[psp1024]

First project will be a home/basement monitor, for humidity, temp, maybe motion/light, but also an ultrasonic ranging sensor to calculate water height in my sump crocks.

Second project will be a solar powered mailbox add-on, to be as much a weather station as possible, as well as light and motion sensor (daylight outside, and weather or not the mailbox has been opened).

Additional projects include quad/gimbal control, and home power control via relays.

[taylor]

I've made a crude DAC for audio that uses pwm and a low pass filter to generate analog signals. I should dig up the code and make it an example. Otherwise some kind of serial DAC would be good. If you can find one with an existing Arduino Library, that would be the one to use!

[memius]

I would like a very precise clock in each Flutter, so that I could do time-of-flight calculations.

[MikeOnBike]

Ditto. Taylor has mentioned the current clock drifts too much. Perhaps a more accurate part could be swapped onto an existing Flutter.

[Banjo13]

I have an existing weather station that I built using an Arduino nano. The only issue is lack of wireless transmission of data due to cost. The flutter is perfectly timed to take this project to the next level. My sensors are DHT 22 for temp and humidity, BMP 180 for barometric pressure, an IR slotted optosensor for wind speed. For wind direction I used an AS5040 breakout board from mad scientist hut. It is way overkill for wind direction but it is a cool sensor. These are the sensors that I am interested in for flutter.

[entity]

Have anyone used another Bluetooth module with Flutter, like JY-MCU bluetooth wireless serial port module or similar?