Lab 4: Temperature & Humidity Sensor

Temperature Conversion - Program Structure

The script should have two main blocks:

• Main block, in which there are:
  • A continuous loop (use repeat forever block) asking users to enter:
    • A number (use terminal receive block) that represents temperature.
    • A unit for the temperature (either F or C)
  • Call a function that converts the temperature to the other unit.
  • At the beginning of this block, you may want to add a new line (use terminal new line block) and a text block that prompts users to enter a number (use terminal print text block).
  • Add a block to pause for 3 seconds (use pause (ms) block).
• Your function block, which:
  • Converts the temperature to the other unit depending on what the users entered. You may want to use if...else... statement.
  • Prints the outcome in the terminal (e.g., "72 degrees F is about 22.22 C.").

Temperature Conversion - Hints

• To convert F to C, you can use the following equation:
  Temp_in_C = (temp_F/10 – 32) x 5/9
  Note: You should first divide the sensor reading by 10.
• BlocklyProp uses integer numbers. The floating point number option allows an integer value to be displayed as a decimal number. Since you may get float numbers after calculation, you may want to use a terminal print with float print in which you can define the number of digits (before the decimal) and the number of places (after the decimal).

Sensor Data Reading - Program Structure

The script should have two main blocks:

• Main block:
  • At the beginning of this block (before the loop), you may want to define a pre-defined variable called k with a value of 1 (k = 1).
  • Then, print in the terminal: "Reading #" k
    In the first iteration, it will print Reading # 1
  • Increment k at the end of the loop (k = k + 1) or after the print statement. In this case, k will be updated at each iteration. So, in the second iteration, it will print Reading # 2
  • A continuous loop (use repeat forever block) to read the sensor data
    • Please note that the sensor is connected to pin 14.
    • Please clear the screen (use Terminal clear screen block)
  • Call a function that converts the temperature to Centigrade.
  • Print the sensor data:
    • Print the reading number
    • Print temperature in F
    • Print temperature in C
    • Print RH in percentage
      Note: The RH read by the sensor is 10 times more than the actual RH, so you should divide it by 10.
  • Print the outcome of the defined conditions (either turning on the AC or heater).
  • Turn on one of the built-in LEDs based on the conditions mentioned above and make it blink 300 ms. If the condition is not true anymore, you should turn the LED off.
  • Add a block to pause for 3 seconds (use pause (ms) block).
  • After that, the terminal is deleted, and the new readings will be displayed.
• Your function block, which:
  • Converts the temperature from F to C.
  • Please note that the temperature read by the sensor is 10 times more than the actual temperature. So you need to first divide it by 10 and then put it in the equation for the conversion.