- Stock: In Stock
- Model: 12AI AM2301 Humidity Temperature Module
12 channels AM2301 temperature and humidity measure sampling circled LED module RS485 module MODBUS RTU RS-485 for PLC/configuration software/singlechip use.
based on isolationRS485 interface, supports Modbus-RTU protocol.
The module finishes the temperature calculation inside, can read the temperature value directly, the unit is Celsius; read out the relative humidity value, the unit is%RH.
Measuring range: AM2301
temperature-40°C～+80°C,resolution0.1°C
Humidity range:0.0%～100.0%,Accuracy3%.
Module provided led display for displaying temperature and humidity values.
Power: DC12-24V Static power is less than 0.05W.
Adopt standard 35mmRail mounting method.
Dimensions:88*72*59
Operating temperature:-35°C～+50°C.
Applications: HVAC, engine room, greenhouse, bean sprout generator monitoring.
This price is just a of module , without the AM2301 sensors.
This price is just a piece of module , without the AM2301 sensors.
The manual and sample in disk, parts of the manual:
————Read the temperature and humidity ————
For example:
A module as a slave communicates with master by RS485, and, read the temperature of 12 ports.
The master sends the message as this format:
|
Send content |
Bytes |
Data |
Meaning |
|
Slave address |
1 |
01 |
No. 01 Slave |
|
Function code |
1 |
03 |
Read register |
|
Register starting address |
2 |
0004 |
The Command of reading |
|
The number of words for reading |
2 |
0030 |
Read the 48 words of temperature and humidity |
|
CRC check |
2 |
XXXX |
The CRC result |
The temperature and humidity value is feedback one by one from port0 to port11.
The feedback format from the slave:
|
Send content |
Bytes |
Data |
Meaning |
|
Slave address |
1 |
01 |
No. 01 Slave |
|
Function code |
1 |
03 |
Read register |
|
Feedback length |
1 |
30 |
Feedback 48 bytes status value |
|
The feedback dates |
48 |
00_AC_01_77 …….. FF_83_01_9C …….. |
* Port0: 17.2 humidity 37.5% …….. Port11: -12.5 humidity 41.2% …….. |
|
CRC check |
2 |
XXXX |
The CRC result |
*The 0=”+” H0AC =172, the value is 10 times of the real temperature, so the real temperature =172/10 =17.2
The F=”-” HFB3 =125(complement), the value is 10 times of the real temperature, so the real temperature = 125/10 =12.5