GTalarm3 User manual V-2022-05-24
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3.3
Sensors. Automation
3.3.1
Humidity sensors AM2302/DHT22/AM2305/AM2306/AM2320/AM2321
Module should work with following sensors: Aosong 1-Wire bus Humidity Sensor AM2302, DHT22, AM2305, AM2306. Also a new smaller sensor
exists AM2320 & AM2321.
Table 6 Sensors AM2302, AM2320/AM2321 specification
Manufacturers' Specification
AM2302
AM2320/AM2321
Operating Range
0
–100
0
–100
Absolute accuracy
(%RH, 25°C)
±3% (10-90%)
±5% (<10, >90%)
±3% (10-90%)
±5% (<10, >90%)
Repeatability (%)
±0.3
±0.1
Long term stability
(% per year)
0.5
0.5
1/e Response (sec)
5
5
Voltage supply (V)
3.3
–5.5
3.1
–5.5(AM2320)
2.6
–5.5(AM2321)
The table lists values taken from datasheets. The Aosong data sheets do not specify maximum tolerances for most parameters, just 'typical' values. It
would therefore seem that any particular device is not guaranteed to meet these specifications. For all the other devices the numbers above are the
maximum tolerances and most also offer better 'typical' specifications.
Each AM2302 sensor connects on separate bus line to digital inputs (D1, D2, and D3). Total up to 3 AM2302 Aosong (Guangzhou) humidity sensors
can be connected to GTalarm3
+5
V
D
3
D
1
D
2
C
O
M
AM2320
VC
C
S
C
L
S
D
A
G
N
D
D1, D2, D3
1
2
3
4
Figure 17 AM2320 connecting diagram
+5
V
D
3
D
1
D
2
C
O
M
AM2302
V
D
D
SD
1
NC
G
N
D
D1, D2, D3
Figure 18 AM2302 connecting diagram
Figure 8 System Options> Digital I/O Settings
If you want to edit existing configuration
,
You have to read it (press
“Read” in the command line)
Edit settings
Write edited configuration (press “Write” in the command line)
Steps to start AM2320 and AM2302 sensors
:
1. Connect the sensor to D1, D2, D3, according the connection diagram
2. Select the sensor type
3. Press „Write“
4. Power the module
