Implement Environmental Sensor under Internet of Things Huang - - PowerPoint PPT Presentation

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Implement Environmental Sensor under Internet of Things Huang - - PowerPoint PPT Presentation

Sep 12, 2023 125 likes •438 views

NRP EEE22 Implement Environmental Sensor under Internet of Things Huang Ruiyue, Amanda Koh BACKGROUND Over reliance on food imports (>90%) Increase self sufficiency Encourage growing edible plants within homes Smart Nation

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NRP EEE22

Implement Environmental Sensor under Internet of Things

Huang Ruiyue, Amanda Koh

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BACKGROUND

▪ Over reliance on food imports (>90%) ▪ Increase self sufficiency ▪ Encourage growing edible plants within homes ▪ Smart Nation

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ENGINEERING GOALS

To build an environment sensor:

  • 1. to be used in a mini farm in individual

households

  • 2. that monitors the microclimate and informs

users when conditions deviate from the ideal

  • 3. that runs on solar energy

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Stage 1: Microcontroller & IoT platforms Stage 3: Integration of Solar Panel Stage 2: Coding Optimisation Stage 4: Soldering

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MATERIALS

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more power efficient

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PLATFORMS

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MKR1000 ESP8266

MICROCONTROLLERS

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DHT22

Temperature and Relative Humidity

LM393

Soil Moisture

LM393

Light

SENSORS

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IOT PLATFORMS

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TP4056 charging board Rechargeable LiPo battery Polycrystalline solar panels

POWER SYSTEM

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STAGE 1

Microcontrollers & IoT Platforms

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  • 1. Create 4 separate systems
  • 2. Code for the same functions:
  • 1. Measure power consumption

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Read and upload data 60s sleep 20s buffer

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MKR1000 ESP8266 Thinger.io Thing Speak Thinger.io Thing Speak Voltage / V 7.00 7.02 7.10 7.09 Sleep / mA 14.1 9.6 12.2 17.7 Awake / mA 101.9 103.5 83.5 88.5 Average / mA 39.1 39.6 35.5 39.8 Average power / W 0.274 0.278 0.252 0.282

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STAGE 2

Code Optimisation

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  • 1. Power input for sensors
  • 1. Power input for microcontroller
  • 1. Sleep time

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Relative humidity

Lower threshold: 60% Upper threshold: 90%

Temperature

Upper threshold: 30°C

Light

Analog Converted to lux

Soil moisture

Calibrated for digital use

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Initial Optimised Voltage / V 7.10 3.46 Sleep current / mA 12.2 0.9 Awake current / mA 83.5 69.3 Average current / mA 35.5 3.4 Average power / W 0.252 0.012

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STAGE 3

Integration of Solar Panel

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▪ 2 solar panels with a combined surface area of 13000mm2 ▪ connected in parallel to charge the battery at a faster rate ▪ maximum output voltage of 5V

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STAGE 4

Soldering

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CONCLUSION

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FUTURE WORK

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▪ Timer relay system to automatically charge battery ▪ Notification system for light readings ▪ Systems to automatically create ideal conditions

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THANK YOU

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QUESTIONS?

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