Overview

The ZMOD4410 is a software-configurable indoor air quality (IAQ) gas sensor platform manufactured by Renesas Electronics (formerly IDT). Integrating a MEMS metal-oxide (MOX) gas sensing element and a signal-conditioning ASIC inside a 3.0×3.0 mm3.0 \times 3.0\text{ mm} LGA package, it measures Total Volatile Organic Compounds (TVOC) and equivalent CO2\text{CO}_2 (eCO2\text{eCO}_2) levels over an I2CI^2C bus.

Designed for high resistance to siloxane contamination, the ZMOD4410 uses configurable heater sequencing profiles to estimate IAQ ratings (1–5 scale), TVOC concentrations (0 to 10 mg/m30\text{ to }10\text{ mg/m}^3), and ethanol/odor levels in thermostats, smart appliances, HVAC automation, and Tasmota / ESP32 environmental monitors.

Quick reference

Operating voltage (VCC)3.3 V to 5.0 V DC (breakout with 1.8V/3.3V LDO)
IC supply voltage (VDD)1.7 V to 3.6 V DC (1.8 V or 3.3 V nominal)
InterfaceI2CI^2C (up to 400 kHz)
Default I2CI^2C address0x32 (Fixed)
TVOC range0.0 mg/m30.0\text{ mg/m}^3 to 10.0 mg/m310.0\text{ mg/m}^3
eCO2\text{eCO}_2 range400 ppm to 2000 ppm
Operating current10 mA10\text{ mA} average (active heating) / 0.2 μA0.2\ \mu\text{A} sleep

Pinout

Breakout module header:

PinNameTypeDescription
1VCCPowerSupply input (+3.3 V to +5.0 V DC)
2GNDPowerGround (0 V)
3SCLDigital InputI2CI^2C Serial Clock
4SDADigital Input / OutputI2CI^2C Serial Data
5RESETDigital InputActive-Low hardware reset pin (optional)
6INTDigital OutputActive-Low interrupt data-ready pin

Specifications

ParameterSymbolMinTypMaxUnitConditions
Supply Voltage (Module)VCCV_{CC}3.33.3 / 5.05.5VPower rail with LDO
Active Supply CurrentICCI_{CC}—10.014.0mAContinuous heater cycling
Standby CurrentIsbI_{sb}—0.21.0µASleep state
TVOC RangeTVOCTVOC0.0—10.0mg/m3\text{mg/m}^3Target gas concentration
eCO2\text{eCO}_2 RangeeCO2eCO_2400—2000ppmEquivalent CO2\text{CO}_2 estimate
Warm-Up Timetwarmupt_{warmup}60——secondsInitial power-on warm-up
Operating TemperatureToprT_{opr}-40—65°CAmbient air

Software Architecture & Algorithms

Unlike sensors with fixed hardware registers, the ZMOD4410 relies on Renesas C software firmware libraries (or open-source driver algorithm ports):

  1. Heater Profile Execution: The host MCU sends a 6-byte command sequence to trigger the internal micro-heater step profile.
  2. ADC Measurement: The sensor samples MOX film resistance across different temperature steps.
  3. Firmware Algorithm: The MCU reads raw resistance bytes from I2CI^2C register 0x07 and executes Renesas' IAQ algorithm library to compute TVOC (mg/m3\text{mg/m}^3), eCO2\text{eCO}_2 (ppm), and IAQ Index (1–5).

Wiring

ZMOD4410 Pin→Arduino / MCUESP32Notes
VCC5V / 3.3V3.3VModule includes LDO regulator
GNDGNDGNDSystem ground
SCLA5GPIO 22I2CI^2C Clock
SDAA4GPIO 21I2CI^2C Data

Example (Tasmota / ESP32 Configuration)

cpp
#include <Wire.h>

#define ZMOD4410_ADDR 0x32

void setup() {
  Serial.begin(115200);
  Wire.begin();

  // Check if ZMOD4410 responds at 0x32
  Wire.beginTransmission(ZMOD4410_ADDR);
  if (Wire.endTransmission() == 0) {
    Serial.println("ZMOD4410 detected on I2C address 0x32.");
  } else {
    Serial.println("ZMOD4410 not found. Check wiring.");
  }
}

void loop() {
  // Main measurement loop using ZMOD algorithm library
  delay(2000);
}

Common mistakes

  • Attempting raw I2CI^2C reads without Renesas software library: The ZMOD4410 outputs raw MOX resistance data; converting these raw values into TVOC mg/m3\text{mg/m}^3 requires linking Renesas' proprietary compiled algorithm library or using Tasmota/ESPHome's ported drivers.
  • Exposure to silicone vapors: Silicone adhesives and sealants emit siloxane gases that permanently contaminate metal-oxide sensors.

Notes

  • ZMOD4410 vs SGP30 vs CCS811: ZMOD4410 is engineered specifically for ultra-low power applications and high siloxane resistance in commercial HVAC products.

Assets & downloads