GTM1 User manual V-2020-08-12
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Contact manufacture for calibration file (email:
Figure 29 SERA2> Automation/ Sensors
Please visit:
How to activate output, when defined value is reached?
How to test the system: hardware status & real time sensor values, event list.
How to read event log from internal memory of the module?
How to change temperature scale from Celsius to Fahrenheit
4.2.2
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 input D1 (Digital I/O D1 in Sera2). Total up to 1 AM2302 Aosong (Guangzhou) humidity
sensor could be connected to GTM1
Steps to start AM2320 and AM2302 sensors:
Prepare the module GTM1
•
Insert SIM card
•
Screw GSM antenna
•
Connect AM2320 or AM2302 to the 1W according connection diagram.
