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ruanhaishen
Nodemcu Firmware
Commits
fee2cf47
Commit
fee2cf47
authored
Apr 06, 2015
by
funshine
Browse files
Merge branch 'master' into dev
parents
450b79db
263179ea
Changes
3
Hide whitespace changes
Inline
Side-by-side
examples/fragment.lua
View file @
fee2cf47
...
...
@@ -14,7 +14,7 @@ sk:connect(80,"115.239.210.27")
sk
:
send
(
"GET / HTTP/1.1\r\nHost: 115.239.210.27\r\nConnection: keep-alive\r\nAccept: */*\r\n\r\n"
)
sk
:
connect
(
80
,
"192.168.0.66"
)
sk
:
send
(
"GET / HTTP/1.1\r\nHost:
1
192.168.0.66\r\nConnection: keep-alive\r\nAccept: */*\r\n\r\n"
)
sk
:
send
(
"GET / HTTP/1.1\r\nHost: 192.168.0.66\r\nConnection: keep-alive\r\nAccept: */*\r\n\r\n"
)
i2c
.
setup
(
0
,
1
,
0
,
i2c
.
SLOW
)
function
read_bmp
(
addr
)
i2c
.
start
(
0
)
i2c
.
address
(
0
,
119
,
i2c
.
RECEIVER
)
c
=
i2c
.
read
(
0
,
1
)
i2c
.
stop
(
0
)
print
(
string.byte
(
c
))
end
...
...
lua_modules/dht22/README.md
View file @
fee2cf47
# DHT
22
module
# DHT
xx
module
This module is compatible with DHT22 and DHT21.
Supports nodemcu with or without floating point.
This module is compatible with DHT11, DHT21 and DHT22.
No need to use a resistor to connect the pin data of DHT22 to ESP8266.
## Example
##Integer Verison[When using DHT11, Float version is useless...]
### Example
```
lua
PIN
=
4
-- data pin, GPIO2
dht22
=
require
(
"dht22"
)
dht22
.
read
(
PIN
)
t
=
dht22
.
getTemperature
()
h
=
dht22
.
getHumidity
()
DHT
=
require
(
"dht_lib"
)
--dht.read11(PIN)
DHT
.
read22
(
PIN
)
t
=
DHT
.
getTemperature
()
h
=
DHT
.
getHumidity
()
if
h
==
nil
then
print
(
"Error reading from DHT22"
)
print
(
"Error reading from DHT
11/
22"
)
else
-- temperature in degrees Celsius and Farenheit
-- floating point and integer version:
print
(
"Temperature: "
..
((
t
-
(
t
%
10
))
/
10
)
..
"."
..
(
t
%
10
)
..
" deg C"
)
-- only integer version:
print
(
"Temperature: "
..
(
9
*
t
/
50
+
32
)
..
"."
..
(
9
*
t
/
5
%
10
)
..
" deg F"
)
-- only float point version:
print
(
"Temperature: "
..
(
9
*
t
/
50
+
32
)
..
" deg F"
)
-- humidity
-- floating point and integer version
print
(
"Humidity: "
..
((
h
-
(
h
%
10
))
/
10
)
..
"."
..
(
h
%
10
)
..
"%"
)
end
-- release module
dht22
=
nil
package.loaded
[
"dht
22
"
]
=
nil
DHT
=
nil
package.loaded
[
"dht
_lib
"
]
=
nil
```
## Functions
### read
read(pin)
Read humidity and temperature from DHT22.
##Float Verison
###Example
```
lua
PIN
=
4
-- data pin, GPIO2
DHT
=
require
(
"dht_lib"
)
--dht.read11(PIN)
DHT
.
read22
(
PIN
)
t
=
DHT
.
getTemperature
()
h
=
DHT
.
getHumidity
()
if
h
==
nil
then
print
(
"Error reading from DHT11/22"
)
else
-- temperature in degrees Celsius and Farenheit
-- floating point and integer version:
print
(
"Temperature: "
..
t
..
" deg C"
)
print
(
"Temperature: "
..
(
9
*
t
/
50
+
32
)
..
" deg F"
)
-- humidity
print
(
"Humidity: "
..
h
..
"%"
)
end
-- release module
DHT
=
nil
package.loaded
[
"dht_lib"
]
=
nil
```
## Functions
### read11
read11(pin)
Read humidity and temperature from DHT11.
###read22
read22(pin)
Read humidity and temperature from DHT22/21.
**Parameters:**
*
pin - ESP8266 pin connect to data pin
in DHT22
*
pin - ESP8266 pin connect to data pin
### getHumidity
getHumidity()
...
...
@@ -54,5 +86,6 @@ getTemperature()
Returns the temperature of the last reading.
**Returns:**
*
last temperature reading in 0.1ºC
*
last temperature reading in(dht22) 0.1ºC (dht11)1ºC
*
lua_modules/dht22/dht
22
.lua
→
lua_modules/dht22/dht
_lib
.lua
View file @
fee2cf47
-- ***************************************************************************
-- DHT22 module for ESP8266 with nodeMCU
-- DHT
xx(11,21,
22
)
module for ESP8266 with nodeMCU
--
-- Written by Javier Yanez
-- Written by Javier Yanez
mod by Martin
-- but based on a script of Pigs Fly from ESP8266.com forum
--
-- MIT license, http://opensource.org/licenses/MIT
-- ***************************************************************************
--Support list:
--DHT11 Tested ->read11
--DHT21 Not Tested->read22
--DHT22 Tested->read22
--==========================Module Part======================
local
moduleName
=
...
local
M
=
{}
_G
[
moduleName
]
=
M
--==========================Local the UMI and TEMP===========
local
humidity
local
temperature
--==========================Local the bitStream==============
local
bitStream
=
{}
function
M
.
read
(
pin
)
local
checksum
local
checksumTest
---------------------------Read bitStream from DHTXX--------------------------
local
function
read
(
pin
)
local
bitlength
=
0
humidity
=
0
temperature
=
0
checksum
=
0
-- Use Markus Gritsch trick to speed up read/write on GPIO
local
gpio_read
=
gpio
.
read
local
bitStream
=
{}
for
j
=
1
,
40
,
1
do
bitStream
[
j
]
=
0
end
local
bitlength
=
0
-- Step 1: send out start signal to DHT22
gpio
.
mode
(
pin
,
gpio
.
OUTPUT
)
...
...
@@ -39,7 +48,7 @@ function M.read(pin)
gpio
.
write
(
pin
,
gpio
.
HIGH
)
gpio
.
mode
(
pin
,
gpio
.
INPUT
)
-- Step 2:
DHT22 send response signal
-- Step 2:
Receive bitStream from DHT11/22
-- bus will always let up eventually, don't bother with timeout
while
(
gpio_read
(
pin
)
==
0
)
do
end
local
c
=
0
...
...
@@ -59,8 +68,53 @@ function M.read(pin)
-- bus will always let up eventually, don't bother with timeout
while
(
gpio_read
(
pin
)
==
0
)
do
end
end
end
---------------------------Convert the bitStream into Number through DHT11 Ways--------------------------
function
M
.
read11
(
pin
)
--As for DHT11 40Bit is consisit of 5Bytes
--First byte->Humidity Data's Int part
--Sencond byte->Humidity Data's Float Part(Which should be empty)
--Third byte->Temp Data;s Intpart
--Forth byte->Temp Data's Float Part(Which should be empty)
--Fifth byte->SUM Byte, Humi+Temp
read
(
pin
)
local
checksum
=
0
local
checksumTest
--DHT data acquired, process.
for
i
=
1
,
8
,
1
do
-- Byte[0]
if
(
bitStream
[
i
]
>
3
)
then
humidity
=
humidity
+
2
^
(
8
-
i
)
end
end
for
i
=
1
,
8
,
1
do
-- Byte[2]
if
(
bitStream
[
i
+
16
]
>
3
)
then
temperature
=
temperature
+
2
^
(
8
-
i
)
end
end
for
i
=
1
,
8
,
1
do
--Byte[4]
if
(
bitStream
[
i
+
32
]
>
3
)
then
checksum
=
checksum
+
2
^
(
8
-
i
)
end
end
if
(
checksum
~=
humidity
+
temperature
)
then
humidity
=
nil
temperature
=
nil
end
end
---------------------------Convert the bitStream into Number through DHT22 Ways--------------------------
function
M
.
read22
(
pin
)
--As for DHT22 40Bit is consisit of 5Bytes
--First byte->Humidity Data's High Bit
--Sencond byte->Humidity Data's Low Bit(And if over 0x8000, use complement)
--Third byte->Temp Data's High Bit
--Forth byte->Temp Data's Low Bit
--Fifth byte->SUM Byte
read
(
pin
)
local
checksum
=
0
local
checksumTest
--DHT data acquired, process.
for
i
=
1
,
16
,
1
do
if
(
bitStream
[
i
]
>
3
)
then
humidity
=
humidity
+
2
^
(
16
-
i
)
...
...
@@ -91,6 +145,7 @@ function M.read(pin)
end
end
---------------------------Check out the data--------------------------
function
M
.
getTemperature
()
return
temperature
end
...
...
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