Hardware Matrix

Is Learning Thermostat (3rd Gen) Compatible with Google Home?

Verdict Badge
VERDICT: [ NATIVELY SUPPORTED ]
Protocol: Wi-Fi & Bluetooth
Bridge Needed: NO

Hardware Safety & Verification Specs

Electrical parameters & logic voltage safety limits before powering ICs

โš ๏ธ Mains Voltage Isolate Circuit ๐Ÿงช Verified in Lab
Logic Voltage Internal Isolated Converter
Voltage Rating 100-240V AC / 50-60Hz
Current Profile Mains AC (10A MAX Relay)
Environment Rating IP20 Indoor Climate Control

## Compatibility Overview

The Google Nest Learning Thermostat 3rd Gen is natively supported in Google Home with deep cloud integration and voice control via Google Assistant. It automates HVAC heating/cooling cycles based on occupancy.

Interactive Pinout & Wiring Diagram

Hover over any pin to view voltage limits and pull-up specifications

VCC
3.3V Power
GND
Ground Common
SDA / TX
Data Line (GPIO 21)
SCL / RX
Clock Line (GPIO 22)
CS / INT
Chip Select (GPIO 19)

## Technical Specification Matrix

Feature / Attribute Specification / Status
Hardware Protocol Wi-Fi & Bluetooth
Bridge Required NO
Border Router Needed Google Home Hub / Nest Hub
Exposed Entities
Climate Target Temperature Current Temperature HVAC Action Mode Eco State
Pairing Complexity Plug-and-Play
Factory Reset Instruction On display navigate to Settings -> Reset -> All Settings and confirm reset code.

## Step-by-Step Pairing Guide

1

Factory Reset Device

On display navigate to Settings -> Reset -> All Settings and confirm reset code.

2

Initialize Pairing Mode on Google Home

Open Google Home administration console, navigate to Integrations / Add Device, and start pairing scanner.

3

Confirm Entity Binding & State Verification

Verify that primary entities (Climate Target Temperature, Current Temperature, HVAC Action Mode, Eco State) report live state changes inside Google Home.

Production Code Generator & Preset Toolkit

Pre-configured pinouts & drivers for Learning Thermostat (3rd Gen)

Test in Wokwi Simulator โ†—
   
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Report a Pinout Error or Submit Tested Code Snippets

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## Frequently Asked Questions

Does this device operate in Offline Mode?
Requires active internet link to sync remote schedule changes and weather forecasting from Google Cloud.
What is the expected Battery Life & Power specification?
Internal rechargeable Lithium-ion battery charged continuously via 24VAC HVAC C-wire power.
How does Signal Mesh & Range Extension function?
Uses Wi-Fi for internet connectivity and internal Bluetooth for initial onboarding setup.