Merge branch 'master' into dev
This commit is contained in:
funshine
commit
fee2cf476a
|
|
@ -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: 1192.168.0.66\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
|
||||
|
|
|
|||
|
|
@ -1,46 +1,78 @@
|
|||
# DHT22 module
|
||||
# DHTxx 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 DHT11/22")
|
||||
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["dht22"]=nil
|
||||
DHT = nil
|
||||
package.loaded["dht_lib"]=nil
|
||||
```
|
||||
##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
|
||||
### read
|
||||
read(pin)
|
||||
Read humidity and temperature from DHT22.
|
||||
|
||||
### 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
|
||||
*
|
||||
|
||||
|
|
|
|||
|
|
@ -1,34 +1,43 @@
|
|||
-- ***************************************************************************
|
||||
-- DHT22 module for ESP8266 with nodeMCU
|
||||
-- DHTxx(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
|
||||
Loading…
Reference in New Issue