Is SCT-013-000 AC Current Transformer 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 Battery Input: 3.0V DC Rail
Current Profile Peak Tx Current: ~180mA to ~250mA @ 3.3V
Enclosure Rating None (Exposed Board)
## Compatibility Overview
Non-invasive split-core AC current transformer clamp measuring main breaker house load up to 100A RMS.
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)
Bi-Directional 4-Channel I2C Level Shifter Diagram BSS138 MOSFET
3.3V Microcontroller
ESP32 / Pico W (LV Pin)
HV ↔ LV Shifter
Low Voltage: 3.3V | High Voltage: 5.0V
5.0V Sensor Peripheral
HC-SR04 / Relay (HV Pin)
## Technical Specification Matrix
| Feature / Attribute | Specification / Status |
|---|---|
| Hardware Protocol | Analog ADC / 3.3V |
| Bridge Required | NO |
| Border Router Needed | None |
| Exposed Entities | RMS AC Current (A) Apparent Power (W) |
| Pairing Complexity | Intermediate |
| Factory Reset Instruction | Hold BOOT button for 3s. |
## Step-by-Step Pairing Guide
1
Factory Reset Device
Hold BOOT button for 3s.
2
Initialize Pairing Mode on Home Assistant (ESPHome)
Open Home Assistant (ESPHome) administration console, navigate to Integrations / Add Device, and start pairing scanner.
3
Confirm Entity Binding & State Verification
Verify that primary entities (RMS AC Current (A), Apparent Power (W)) report live state changes inside Home Assistant (ESPHome).
Production Code Generator & Preset Toolkit
Pre-configured pinouts & drivers for SCT-013-000 AC Current Transformer
👥 Community Verified Database
Continuous hardware testing updates
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Found a pin mapping quirk or built a custom ESPHome YAML driver for SCT-013-000 AC Current Transformer? Help us keep this matrix 100% accurate.
Hardware Correction Form (emb-esp32-current-ct-ha)
## Frequently Asked Questions
Does this device operate in Offline Mode?
100% local AC current sampling.
What is the expected Battery Life & Power specification?
3.3V DC biased analog circuit into GPIO34 (ADC1).
How does Signal Mesh & Range Extension function?
Wi-Fi 2.4GHz.