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

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 2

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 3

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

MATERIALS 5

PLATFORMS more power efficient > 6

MICROCONTROLLERS MKR1000 ESP8266 7

SENSORS DHT22 LM393 LM393 Temperature and Light Soil Moisture Relative Humidity 8

IOT PLATFORMS 9

POWER SYSTEM Polycrystalline Rechargeable TP4056 solar panels LiPo battery charging board 10

STAGE 1 Microcontrollers & IoT Platforms 11

1. Create 4 separate systems 2. Code for the same functions: Read and 20s 60s upload buffer sleep data 1. Measure power consumption 12

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MKR1000 ESP8266 Thing Thing Thinger.io Thinger.io Speak Speak Voltage / V 7.00 7.02 7.10 7.09 Sleep 14.1 9.6 12.2 17.7 / mA Awake 101.9 103.5 83.5 88.5 / mA Average 39.1 39.6 35.5 39.8 / mA Average power 0.274 0.278 0.252 0.282 / W 14

STAGE 2 Code Optimisation 15

1. Power input for sensors 1. Power input for microcontroller 1. Sleep time 16

Relative humidity Temperature Lower threshold: 60% Upper threshold: 30 ° C Upper threshold: 90% Light Soil moisture Analog Calibrated for digital Converted to lux use 17

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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 19

STAGE 3 Integration of Solar Panel 20

▪ 2 solar panels with a combined surface area of 13000mm 2 ▪ connected in parallel to charge the battery at a faster rate ▪ maximum output voltage of 5V 21

STAGE 4 Soldering 22

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CONCLUSION 26

FUTURE WORK 27

▪ Timer relay system to automatically charge battery ▪ Notification system for light readings ▪ Systems to automatically create ideal conditions 28

THANK YOU 29

QUESTIONS? 30