Oliver's Projects
What it does
Flood-o-matic is a water alarm made from three micro:bits that talk by radio. One sits by the water with a sensor, one passes the message along, and one stays somewhere dry and shows an umbrella when the water gets too high.
Try it
Reading: 0Drag the slider to raise the water. Each second the sensor sends its reading by radio, and the alarm shows an umbrella above 500.
11 · Sensorreads pin 0, sends it
12 · Repeaterpasses it on
13 · Alarmall dry
How it works
- Sensor micro:bit reads the water sensor on pin 0 (a number from 0 to 1023) and sends it by radio every second.
- Repeater micro:bit catches each message and sends it again, so the signal reaches further.
- Alarm micro:bit turns the message back into a number. Above 500 it shows an umbrella, otherwise a happy face.
All three use radio group 1, so they only listen to each other.
Photos
add a photo of the three micro:bits set up.
