Is ZMPT101B AC Voltage Transformer Module Compatible with Home Assistant (ESPHome)?

Verdict Badge

VERDICT: [ COMPATIBLE — MANUAL YAML CONFIGURATION REQUIRED ]

Protocol: Analog ADC / 3.3V

Bridge Needed: NO

Hardware Safety & Electrical Verification

Electrical parameters & logic voltage safety limits before powering ICs

🟢 3.3V Native Direct Hookup 🧪 Verified in Lab

Signal Logic GPIO Logic: 3.3V CMOS

Input Power USB Input: 5V DC (3.3V LDO)

Current Profile Peak Tx Current: ~180mA to ~250mA @ 3.3V

Enclosure Rating None (Exposed Board)

## Compatibility Overview

Active single-phase AC voltage transformer module measuring grid AC voltage from 100V to 250V AC.

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	Analog ADC / 3.3V
Bridge Required	NO
Border Router Needed	None
Exposed Entities	RMS AC Voltage (V) Sine Wave Peak Calibration Offset
Pairing Complexity	Intermediate
Factory Reset Instruction	Hold BOOT button for 3s.

## Step-by-Step Pairing Guide

Factory Reset Device

Hold BOOT button for 3s.

Initialize Pairing Mode on Home Assistant (ESPHome)

Open Home Assistant (ESPHome) administration console, navigate to Integrations / Add Device, and start pairing scanner.

Confirm Entity Binding & State Verification

Verify that primary entities (RMS AC Voltage (V), Sine Wave Peak, Calibration Offset) report live state changes inside Home Assistant (ESPHome).

Production Code Generator & Preset Toolkit

Pre-configured pinouts & drivers for ZMPT101B AC Voltage Transformer Module

SDA Pin: SCL Pin:

Test in Wokwi Simulator ↗ | Real-time pin binding active

👥 Community Verified Database Continuous hardware testing updates

Report a Pinout Error or Submit Tested Code Snippets

Found a pin mapping quirk or built a custom ESPHome YAML driver for ZMPT101B AC Voltage Transformer Module? Help us keep this matrix 100% accurate.

## Frequently Asked Questions

Does this device operate in Offline Mode?

100% local AC voltage sampling.

What is the expected Battery Life & Power specification?

5V VCC Analog Out=GPIO34 (ADC1).

How does Signal Mesh & Range Extension function?

Wi-Fi 2.4GHz.