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Home Buttons

Home Buttons

Features:

  • 6 push buttons, multiple press support
  • 2.9" e-paper display
  • Text labels and Material Design Icons
  • Wi-Fi connectivity
  • Less than 1 second from button press to triggered action (depending on your network)
  • Temperature & humidity sensor
  • Power options: 18650 Li-Ion Battery Cell, USB-C, 5V DC
  • Greater than 1 year battery life
  • USB-C charging
  • Compact size: 87 x 87 x 23 mm

Getting Started

Set up you device with the help of Getting Started guide.

Where To Get

You can buy Home Buttons on Tindie or Lectronz.

I sell on Tindie

I sell on Lectronz

Technical Specifications

Physical

Dimensions

  • Width: 86.5 mm
  • Height: 86.5 mm
  • Depth: 22.8 mm
  • Weight: 140 g (incl. battery)
  • Casing material: PETG (3D printed)

User Interface

  • E-paper display
  • 6 tactile buttons with LED illumination

Display

  • Type: Single color E-paper (non-illuminated)
  • Size: 2.9"
  • Resolution: 296 x 128
  • Model number: Good Display GDEY029T94

Connectivity

  • 2.4Ghz WiFi
    • MQTT protocol (Supports MQTT Discovery)
  • USB Type-C connector
    • Charging
    • Firmware update (USB DFU mode)
    • Debug messages (USB CDC mode)

SoC

  • ESP32-S2
    • Xtensa® Single­Core 32­bit LX7
    • Integrated WiFi modem: IEEE 802.11 b/g/n (2.4 GHz Wi­Fi)
  • Supports OTA (Over-The-Air firmware update)
  • Native USB for firmware update and debug
  • Advanced security features

Environmental Sensor

  • Sensirion SHTC3 high accuracy Temperature and Relative Humidity sensor
  • Temperature accuracy: ±0.2°C (0°C to 60°C)
  • Humidity accuracy: ±2% RH (20% RH to 80% RH)

Battery

  • 3.7 V Lithium-Ion 18650 battery cell (non-protected) is required
  • WARNING: maximum cell length is 65.5 mm. Button top cells might not fit properly
  • Expected battery life: 18 months
    • Assuming Panasonic NCR18650B 3400mAh or equivalent
  • Battery safety features:
    • Reverse polarity protection
    • Over-discharge protection
    • Over-charge protection
    • Overload protection

Charging at extreme temperatures (below 0°C or above 50°C) is not recommended. Check your battery specifications for more information

Charging

  • Any standard USB Type-C power supply is sufficient for charging

    Can also be charged using any computer USB port

  • Battery charging current: 780 mA

    Make sure the selected battery can be safely charged at this rate

  • Expected recharging time from empty: 4 hours

    Assuming Panasonic NCR18650B 3400 mAh or equivalent