Gravity: H2S Sensor (Calibrated) - I2C & UART
Factory-calibrated electrochemical H2S sensor (0–100ppm) with analog, I2C, and UART (0–3V) outputs, 3.3–5.5V supply. Temperature compensation included; lifespan >2 years.
Pinout
- DTSmart Gas terminal 1Type · Signal
- CRSmart Gas terminal 2Type · Signal
- -Smart Gas terminal 3Type · Ground
- +Smart Gas terminal 4Type · Power
- VCCAdditional header 1Type · Power
- GNDAdditional header 2Type · Ground
- V0Additional header 3Type · Signal
- ALAAdditional header 4Type · Signal
- NAAdditional header 5Type · Unknown
| Pin | Position | Type |
|---|---|---|
| DT | Smart Gas terminal 1 | Signal |
| CR | Smart Gas terminal 2 | Signal |
| - | Smart Gas terminal 3 | Ground |
| + | Smart Gas terminal 4 | Power |
| VCC | Additional header 1 | Power |
| GND | Additional header 2 | Ground |
| V0 | Additional header 3 | Signal |
| ALA | Additional header 4 | Signal |
| NA | Additional header 5 | Unknown |
Pin details
9 connections- DTSmart Gas terminal 1Signal
- CRSmart Gas terminal 2Signal
- -Smart Gas terminal 3Ground
- +Smart Gas terminal 4Power
- VCCAdditional header 1Power
- GNDAdditional header 2Ground
- V0Additional header 3Signal
- ALAAdditional header 4Signal
- NAAdditional header 5Unknown
Start wiring
I2C · Analog · UART · 3.3 – 5 V · Breakout
Waveshare lists MQ-2 for combustible gases and smoke, MQ-3 for alcohol, and MQ-135 for mixed indoor pollutants such as NH3, NOx, alcohol,…
Module pins: +, VCC, -, GND, D/T, C/R, V0, ALA. Schematik maps them to your board in the app.
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