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SODIS

Step 1 @showdialog

Welcome to Solar Disinfection Coding Tutorial built-project-image

Step 2 @showdialog

Plug your USB cable into the micro:bit. breakout board

Step 3

Click ||logic: Logic|| drag and drop ||logic:If then Else|| block inside ||basic:forever|| loop.

basic.forever(function () {
    
    if (true) {
          } 
    else {
        }
        )}

Step 4

Click ||Logic:Logic|| drag and drop ||Logic:Comparison <|| block to replace ||Logic:true|| condition of ||Logic:If true then|| block. Change ||Logic:less than <|| to ||Logic:greater than >||.

basic.forever(function () {
    
    if (0>0) {
          } 
    else {
        }
        )}

Step 5

Click ||Input:Input|| drag and drop ||Input:light level|| block to replace ||Logic:0|| on the left side of ||Logic:Comparison|| block. Change ||Logic:0|| on the right side to ||Logic:128||.

basic.forever(function () {
    
    if (input.lightLevel()>128) {
          } 
    else {
        }
        )}

Step 6

Click ||Variables:Variables|| create two ||Variables:Variables||:

  • ||Variables:totalLightExposure||
  • ||Variables:exposure_start_time||

Step 7

Click ||Variables:Variables|| drag and drop ||Variables:change totalLightExposure by 1|| block inside ||Logic:If|| ||Input:light level|| ||Logic:> 128 then|| block.

basic.forever(function () {
    
    if (input.lightLevel()>128) {
    totalLightExposure += 1
          } 
    else {
        }
        )}

Step 8

Click ||Math:Math|| drag and drop ||Math:Substraction|| block to replace ||Variables:1|| in ||Variables:change totalLightExposure by|| block.

basic.forever(function () {
    if (input.lightLevel()>128) {
    totalLightExposure += (0-0)
          } 
    else {
        }
        )}

Step 9

Click ||Input:Input|| then ||Input:more|| drag and drop ||Input:running time (ms)|| block to replace left ||Math:0|| in ||Math:Substraction|| block.

basic.forever(function () {
    if (input.lightLevel()>128) {
    totalLightExposure += (input.runningTime()-0)
          } 
    else {
        }
        )}

Step 10

Click ||Variables:Variables|| drag and drop ||Variables:exposure start time|| block to replace right ||Math:0|| in ||Math:Substraction|| block.

basic.forever(function () {
    if (input.lightLevel()>128) {
    totalLightExposure += (input.runningTime()- exposure_start_time)
          } 
    else {
        }
        )}

Step 11

Click ||Variables:Variables|| drag and drop ||Variables:set exposure_start_time|| block under ||Variables:change totalLightExposure by|| block.

basic.forever(function () {
    if (input.lightLevel()>128) {
    totalLightExposure += (input.runningTime()- exposure_start_time)
    exposure_start_time = 0
          } 
    else {
        }
        )}

Step 12

Click ||Input:Input|| then ||Input:more|| drag and drop ||Input:running time (ms)|| block to replace ||0|| in ||Variables:set exposure_start_time to|| block.

basic.forever(function () {
    if (input.lightLevel()>128) {
    totalLightExposure += (input.runningTime()- exposure_start_time)
    exposure_start_time = input.runningTime()
          } 
    else {
        }
        )}

Step 13

Click ||logic:Logic|| drag and drop ||logic:If true then|| block under ||Variables:set exposure_start_time to|| block.

basic.forever(function () {
    if (input.lightLevel()>128) {
    totalLightExposure += (input.runningTime()- exposure_start_time)
    exposure_start_time = input.runningTime()
    if(true){
    }
          } 
    else {
        }
        )}

Step 14

Click ||Logic:Logic|| drag and drop ||Logic:Comparison|| block to replace ||Logic:true|| condition of ||Logic:If true then|| block.

basic.forever(function () {
    if (input.lightLevel()>128) {
    totalLightExposure += (input.runningTime()- exposure_start_time)
    exposure_start_time = input.runningTime()
    if(0>0){
    }
          } 
    else {
        }
        )}

Step 15

Click ||Variables:Variables|| drag and drop ||Variables:totalLightExposure|| block to replace left ||Logic:0|| of ||Logic:Comparison|| block.

basic.forever(function () {
    if (input.lightLevel()>128) {
    totalLightExposure += (input.runningTime()- exposure_start_time)
    exposure_start_time = input.runningTime()
    if(totalLightExposure>0){
    }
          } 
    else {
        }
        )}

Step 16

Click ||Math:Math|| drag and drop ||Math:Mutliplication|| block to replace right ||Logic:0|| of ||Logic:Comparison|| block.

basic.forever(function () {
    if (input.lightLevel()>128) {
    totalLightExposure += (input.runningTime()- exposure_start_time)
    exposure_start_time = input.runningTime()
    if(totalLightExposure > (0 * 0)){
    }
          } 
    else {
        }
        )}

Step 17

Click ||Math:Math|| drag and drop ||Math:Mutliplication|| block to replace left ||Math:0|| of ||Math:Mutliplication|| block.

basic.forever(function () {
    if (input.lightLevel()>128) {
    totalLightExposure += (input.runningTime()- exposure_start_time)
    exposure_start_time = input.runningTime()
    if(totalLightExposure > ((0 * 0) * 0)){
    }
          } 
    else {
        }
        )}

Step 18

Change the values in ||Math:Math|| block to ||Math:6 x 3600 x 1000||.

basic.forever(function () {
    if (input.lightLevel()>128) {
    totalLightExposure += (input.runningTime()- exposure_start_time)
    exposure_start_time = input.runningTime()
    if(totalLightExposure > ((6 * 3600) * 1000)){
    }
          } 
    else {
        }
        )}

Step 19

Click ||Basic:Basic|| drag and drop ||Basic:show icon|| block inside ||Logic:if|| ||Variables:totalLightExposure|| ||Logic:then|| block. Change ||basic:Heart|| to ||basic::)|| icon.

basic.forever(function () {
    if (input.lightLevel()>128) {
    totalLightExposure += (input.runningTime()- exposure_start_time)
    exposure_start_time = input.runningTime()
    if(totalLightExposure > ((6 * 3600) * 1000)){
    basic.showIcon(IconNames.Happy)
    }
          } 
    else {
        }
        )}

Step 20

Click ||Basic:Basic|| drag and drop ||Basic:show string|| block under ||Basic:show icon|| block. Change string to ||basic:Safe||.

basic.forever(function () {
    if (input.lightLevel()>128) {
    totalLightExposure += (input.runningTime()- exposure_start_time)
    exposure_start_time = input.runningTime()
    if(totalLightExposure > ((6 * 3600) * 1000)){
    basic.showIcon(IconNames.Happy)
    basic.showString("Safe")
    }
          } 
    else {
        }
        )}

Step 21

Click ||Basic:Basic|| drag and drop ||Basic:show string|| block inside ||Logic:else|| condition. Change string to ||basic:Not Safe||.

basic.forever(function () {
    if (input.lightLevel()>128) {
    totalLightExposure += (input.runningTime()- exposure_start_time)
    exposure_start_time = input.runningTime()
    if(totalLightExposure > ((6 * 3600) * 1000)){
    basic.showIcon(IconNames.Happy)
    basic.showString("Safe")
    }
          } 
    else {
    basic.showString("Not Safe")
        }
        )}

Step 22

|Download| and test your code. Congratulations on completing your SODIS project!