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ruanhaishen
Nodemcu Firmware
Commits
0b8b883e
Commit
0b8b883e
authored
Jan 21, 2015
by
Javier Yáñez
Browse files
README.md for DHT22 module
parent
b6a40301
Changes
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lua_modules/dht22/README.md
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0b8b883e
# DHT22 module
## Example
```
lua
PIN
=
4
-- data pin, GPIO2
dht22
=
require
(
"dht22"
)
dht22
.
read
(
PIN
)
t
=
dht22
.
getTemperature
()
h
=
dht22
.
getHumidity
()
-- temperature in degrees Celsius and Farenheit
print
(
"Temperature: "
..
(
t
/
10
)
..
"."
..
(
t
%
10
)
..
" deg C"
)
print
(
"Temperature: "
..
(
9
*
t
/
50
+
32
)
..
"."
..
(
9
*
t
/
5
%
10
)
..
" deg F"
)
-- humidity
print
(
"Humidity: "
..
(
h
/
10
)
..
"."
..
(
h
%
10
)
..
"%"
)
-- release module
dht22
=
nil
package.loaded
[
"dht22"
]
=
nil
```
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