Thermometer exercise – CUI32/LED Strip – Martin Bach Nielsen

For this exercise, I decided to try and incorporate a thermometer with auditive and visual feedback into clothing. The idea being that people suffering from low tolerance to body temperature changes (a condition that I apparently totally made up), would be able to have a type of security everywhere they go.

The most obvious place to put a colored LED strip would be in the sleeves of a shirt, since it fits the length, and this part of your body is always within visual range. I used the CUI32 to control the LED’s and a small piezo speaker. The algorithm on the CUI is fairly simple, which I will try to outline here:

• If body temperature is below the norm, the LED’s are green and no sound is played
• If body temperature rises higher than the norm, the LED’s turn red and a warning note is played.
• For every degree (this incrementation might need to be finer than 1 degree), the temperature rises, the note will also rise in pitch.
• Warning note and sound will disappear if the temperature drops below normal again.

Below is the BASIC code that the CUI is running and after that, a demonstration video of how the concept prototype turned out

CODE

10 dim i, j

20 dim cmd as byte, rsp[2] as byte

30 dim temp

40 dim freq

50 dim audio as pin rd1 for frequency output

60 dim leds[20] as byte

70 dim latch as pin rg9 for digital output open_drain

80 dim sync as pin rg6 for digital output open_drain

90 let latch = 0, sync = 0

100 while 1 do

110   print temp

120   if temp>=25 then

130     let audio = temp*10

140     for i = 0 to leds#-1

150       let leds[i] = 0x80+0x6

160       sleep 5 ms

170     next

180   else

190     let audio = 0

200     for i = 0 to leds#-1

210       let leds[i] = 0x80+0x3

220     next

230   endif

240   qspi leds

250   let latch = 1, latch = 0

260   let cmd = 0

270   i2c start 0x48

280   i2c write cmd

290   i2c read rsp

300   let temp = rsp[0]

310   i2c stop

320 endwhile

END CODE

DEMO VIDEO