Paul Kanz
Published © CC BY-NC-ND

Wireless Temperature and Humidity Sensor with Encryption

Arduino based wireless temperature and humidity sensor, can run for 1 year on single 14505 battery, and data transmission is encrypted.

IntermediateWork in progress1 hour2,010
Wireless Temperature and Humidity Sensor with Encryption

Things used in this project

Hardware components

moteino
×1
Moteino
×1
HopeRF TH02 Humidity Module
×1
Single AA battery holder
×1
3.6V 2.4Ah Li-SOCl2 battery
×1
Custom Moteino Shield from OSH Park
×1

Software apps and online services

Arduino IDE
Arduino IDE

Hand tools and fabrication machines

Soldering iron (generic)
Soldering iron (generic)

Story

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Schematics

Indoor Sensor Lite

Eagle Schematic of Indoor Sensor Lite
Indoor sensor lite

Code

Untitled file

Arduino
Sample of power savings for MCU
  //  sample of how I'm shutting down the MCU for power-savings
  //
  void setup() {
  //
    //  power on TH02
    pinMode(si7005Vcc, OUTPUT);
    digitalWrite(si7005Vcc, HIGH);
    //
    //  disable heater and enable fast measurement (less time spent sampling)
    Si.disableHeater();
    Si.enableFastMeasurements();
  }
  //
  void loop() {
  //  Turn serial back on
    Serial.begin(SERIAL_BAUD);
    //
    //  turn TH02 back on
    digitalWrite(si7005Vcc, HIGH);
    //
    .....
    //
    //  shutdown devices and idle for ~60 seconds
    Serial.flush();
    Serial.end();
    radio.sleep();
    digitalWrite(si7005Vcc, LOW);
    //
    for (int count = 0; count < 7; count++) {
      LowPower.powerDown(SLEEP_8S, ADC_OFF, BOD_OFF);
    }
  }

Credits

Paul Kanz

Paul Kanz

4 projects • 8 followers

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