Skip to content

Latest commit

 

History

History
166 lines (122 loc) · 3.87 KB

index.md

File metadata and controls

166 lines (122 loc) · 3.87 KB

class: center

HouseBus overview

.big[Nick Sellen, Matthias Larisch]

home automation / smart home

  • gathering data about the house
    • temperature, humidity
    • utilities data (water, gas, electricity)
    • door bell usage...
  • controlling things around the house
    • lights, fans, door opening
  • data awareness
    • showing people inside and outside the house how we live
  • cool, fun learning project

don't they already exist?

class: middle, center

Hardware

  • STM32 Microcontroller
    • 64 kByte program memory
    • 16 kByte RAM
    • 48 MHz
  • CAN Transceiver
  • 8 kByte EEPROM
  • Connectors
    • Bus
    • Debug/Programming
    • Sensors
  • Soldering area

---

---

---

CAN-Bus

CC BY-SA Erkaha from wikimedia commons
CC BY-SA 3.0, https://commons.wikimedia.org/w/index.php?curid=31571749
  • Electrical transfer protocol: symmetrical, bidirectional transfer
  • Arbitration, addressing, CRC

UAVCAN

  • builds on top of CAN:

    • addresses (127 nodes per network)
    • data types
    • broadcast messages
    • request / response messages

  • Example type definition:

uint3 brightness
bool door_open
bool person_inside
bool private_mode
bool fan_running

Software

/* some more stuff above */

void app_config_update(void)
{
  uint32_t t = config_get_uint(CONFIG_TEMPERATURE_RECEIVER_TARGET_NODE_ID);
  setReceiverTarget(t);
  wallTemperatureFactor = config_get_uint(CONFIG_WALL_TEMPERATURE_FACTOR_BY_1024);
  firstAlarmAfter = TIME_S2I(config_get_uint(CONFIG_HUMIDITY_ALARM_FIRST_AFTER_S));
  repeatAlarmEvery = TIME_S2I(config_get_uint(CONFIG_HUMIDITY_ALARM_REPEAT_INTERVAL_S));
}

void app_init(void)
{
  tone_init();
  bme280_app_init();
}

void app_fast_tick(void)
{
  melody_tick();
}

void app_tick(void)
{
  bme280_app_read();
  humidity_alarm_tick();
}

Our applications

  • influxdb writer
  • internal web ui http://kanthaus-server
    • lets you control attic fan speed
  • in progress
    • RFID tag door opener
    • solar battery charger data
  • vaguely related
    • wifi and router data collection

Ideas?

  • automate fan speed based on humidity?
  • open/close ventilation flaps based on humidity?
  • doorbell announcer?
  • thermostat controlled room heating controls?
  • e-ink displays around the house to show useful information?

layout: false class: big

Join us!