AM2305 DIGITAL TEMPERATURE & HUMIDITY SENSOR

Introduction to the product

AM2305 Digital Temperature & Humidity Sensor is a temperature and humidity combined sensor been calibrated digital signal output. The sensor includes a capacitive sensor wet components and a DS18B20 temperature measurement device and connected with a high-performance 8-bit microcontroller. Each AM2305 sensors are an extremely accurate humidity calibration chamber for calibration. Calibration coefficients stored in the form of a program in OTP memory, internal sensor detection signal processing to call these calibration coefficients. The single-wire serial interface, system integration becomes simpler and quicker. Ultra-small size, low power consumption, signal transmission distance up to 20 meters or more, making it the best choice of even the most demanding applications in a variety of applications then, the product leads to three core shielded cables.

Product Specifications

Parameters	Value
Power Supply	5V
Measuring Range	.-40~80℃
Interface	Digital
Digital	±0.3℃; ±3% RH
Temperature Range	.-40~80℃
Accuracy	±0.3℃;±3%RH
Features	Metal screen/capacitance sensor
Sensor Type	AHT10 integration sensor
Output	Digital Sensor, Digital 1 Wire
Humidity Range	0~99.9%RH
Wiring	Red - Power supply Yellow - Data Black - Ground

Configuration Guide

Before configuring, ensure that the AM2305 sensors are connected to the Transight telematics device as per the sensor pinout. Improper wiring may lead to failed communication or sensor detection issues.

⚠️ Note: Only one AM2305 sensor can be connected to any Transight device with 1-Wire capability.

Step 1: Enable 1-Wire Sensor Interface

This command activates the 1-Wire port for sensor communication.

Command:

SET CUENOW:ON

Expected Response:

IMEI: 862942074896044

Command: SET CUENOW:ON
 
Response:  

Error : 0

Verification Command:

GET CUENOW

Expected Verification Response:

IMEI: 862942074896044

Command: GET CUENOW
 
Response: ENOW:ON

Error : 0

Step 2: Configure Sensor Model

Set the sensor type to AM2305.

Command:

SET CUOWCFG:AM2305

Expected Response:

IMEI: 862942074896044

Command: SET CUOWCFG:AM2305
 
Response:  

Error : 0

Verification Command:

GET CUOWCFG

Expected Verification Response:

IMEI: 862942074896044

Command: GET CUOWCFG
 
Response: OWCFG: AM2305

Error : 0

Step 3: Specify Number of Connected Sensors

Define the number of connected 1-Wire sensors (only 1 allowed for AM2305).

Command:

SET CUOWNOS:1

Expected Response:

IMEI: 862942074896044

Command: SET CUOWNOS:1
 
Response:  

Error : 0

Verification Command:

GET CUOWNOS

Expected Verification Response:

IMEI: 862942074896044

Command: GET CUOWNOS
 
Response: TEMPERATURE SENSOR NOS: 1

Error : 0

Mandatory Finalization Step

Apply and save all sensor settings.

Command:

SET CUMR:2

Post-Configuration Validation Checklist

After configuration:

• 🔄 Monitor incoming device packets.

• 🌡️ Ensure temperature and humidity values appear in payload.

• 📈 Confirm periodic updates from the sensor.

• ✅ Verify data consistency and accuracy via backend or cloud platform.