📡 ESPHome Sensor Telemetry Tool

ESPHome Multi-Sensor Power & Battery Sizer

Estimate peak current draw (mA), deep sleep battery longevity, sensor power budgets, and generate YAML configuration files for Home Assistant custom microcontrollers.

⚙️ Hardware & Sensor Components

Microcontroller Board Platform

Power Supply & Power Mode

Connected Sensors & Accessories

LD2410 mmWave Human Presence Radar (+80mA)

BME280 Temp / Humidity / Pressure (+3mA)

SCD40 NDIR CO2 Air Quality Sensor (+18mA avg)

SSD1306 0.96" OLED Status Display (+25mA)

Peak Current Draw

243 mA

Wi-Fi TX Transmission Peak

Avg Power Consumption

0.72 W

Continuous Operation

Battery Runtime

Always On

Wall Powered

esphome_multisensor.yaml Snippet

esphome:
  name: living-room-multisensor

esp32:
  board: esp32dev

sensor:
  - platform: bme280
    temperature:
      name: "Living Room Temperature"
    humidity:
      name: "Living Room Humidity"
    address: 0x76

💡 ESPHome Hardware Guidelines

mmWave presence sensors (LD2410) require continuous power and should not be used on battery nodes.
Add a 470uF electrolytic capacitor across 3.3V power rails to absorb Wi-Fi TX current spikes.