The ANWETECH AT-GD231 is an indoor LoRaWAN® carbon monoxide sensor designed for continuous environmental monitoring. It measures CO concentration from 0 to 1,000 ppm and also supports temperature and humidity monitoring.
A 4.2-inch black-and-white electronic ink display provides local environmental information, while integrated LED indicators and a buzzer provide local status indication. The device communicates through the standard LoRaWAN® 1.0.2 protocol for remote monitoring and data management.
The AT-GD231 LoRaWAN Carbon Monoxide Sensor combines carbon monoxide sensing, environmental monitoring, local display and wireless data communication in one compact indoor device.
The sensor continuously monitors CO concentration together with temperature and humidity information. Monitoring data can be displayed locally on the electronic ink screen and transmitted remotely through a LoRaWAN® network according to the configured reporting cycle.
When monitored data reaches a preset threshold, the device can activate its local warning mechanism while alarm information is reported to the connected network or cloud platform.
The AT-GD231 uses an integrated antenna and supports wall mounting with a bracket. The source specification also indicates compatibility with an 86-type box installation method and installation surfaces such as wood, iron and plastic.
| Parameter | Specification |
|---|---|
| Product Model | AT-GD231 |
| Product Type | LoRaWAN Carbon Monoxide Sensor |
| CO Measurement Range | 0–1,000 ppm |
| CO Accuracy | ±5 ppm or ±5%, whichever is greater |
| CO Resolution | 0.5 ppm |
| Response Time (T90) | <60 s |
| Repeatability | ±2% |
| Zero Drift | ≤10 ppm, equivalent to CO |
| Long-Term Output Drift | <3%/year |
| Life Expectancy | 10 years |
| Display | 4.2-inch black-and-white electronic ink screen |
| LED Indicators | 3 LEDs: green, orange, red |
| Buzzer | 1 |
| Buttons | 1 power button + 1 built-in reset button |
| Interface | 1 × USB Type-C |
| Communication Protocol | Standard LoRaWAN® 1.0.2 |
| Frequency Band | EU868 |
| Optional Frequency Bands | CN470 / IN865 / US915 / AU915 / AS923 |
| Transmit Power | 18.5 ±1 dBm maximum |
| Receiving Sensitivity | -135 ±1 dBm @ SF=12 |
| Network Access | OTAA / ABP |
| Working Mode | Class A / Class C |
| Configuration | Configuration Server |
| Power Supply | USB Type-C, 5V / 1A |
| Operating Temperature | -20°C to +60°C |
| E-Ink Screen Operating Temperature | 0°C to +40°C |
| Operating Humidity | ≤90% RH, non-condensing |
| Dimensions | 115 × 109 × 22.7 mm |
| Installation | Bracket-fixed wall installation |
| Recommended Installation | Indoors, without obstruction |
These specifications are taken from the supplied product specification.
Measurement Range: 0–1,000 ppm
Accuracy: ±5 ppm or ±5%, whichever is greater
Resolution: 0.5 ppm
Response Time (T90): <60 seconds
Repeatability: ±2%
The source document does not specify a spatial CO detection distance or coverage area, so no detection radius or square-meter coverage is stated here.
Maximum Communication Distance: Up to 3 km in an open environment.
Actual communication conditions depend on the installation environment and obstruction conditions; the source specifically states the 3 km value for an open environment.
The AT-GD231 is powered through a:
USB Type-C interface — 5V / 1A
Remote data communication is provided through LoRaWAN® wireless communication.
Supported network modes:
OTAA / ABP
Class A / Class C
The supplied specification does not identify relay outputs, RS485, Modbus, dry contacts or other wired alarm signal outputs, so these functions are not listed.
The AT-GD231 is designed for indoor wall installation.
The source specification identifies:
For LoRaWAN® communication, the installation position should be selected to avoid unnecessary obstruction between the sensor and wireless network infrastructure.
According to the supplied product specification, the AT-GD231 is suitable for indoor environmental monitoring applications such as:
