nodemcu-firmware/lua_modules/bmp085/bmp085.EN.md

BMP085 module

##Require

bmp085 = require("bmp085")

Release

bmp085 = nil
package.loaded["bmp085"]=nil

##init() ####Description Setting the i2c pin of bmp085.

####Syntax init(sda, scl)

####Parameters sda: 1~12, IO index.
scl: 1~12, IO index.

####Returns nil

####Example

bmp085 = require("bmp085")
gpio5 = 1
gpio4 = 2
sda = gpio5
scl = gpio4
bmp085.init(sda, scl)
-- Don't forget to release it after use
bmp085 = nil
package.loaded["bmp085"]=nil

####See also -

##getUP() ####Description Get calibrated data of pressure from bmp085.

####Syntax getUP(oss)

####Parameters oss: Over sampling setting, which is 0,1,2,3. Default value is 0.

####Returns p: Integer, calibrated data of pressure from bmp085.

####Example

bmp085 = require("bmp085")
sda = 1
scl = 2
bmp085.init(sda, scl)
p = bmp085.getUP(oss)
print(p)
-- Don't forget to release it after use
bmp085 = nil
package.loaded["bmp085"]=nil

####See also -

##getUP_raw() ####Description Get raw data of pressure from bmp085.

####Syntax getUP_raw(oss)

####Parameters oss: Over sampling setting, which is 0,1,2,3. Default value is 0.

####Returns up_raw: Integer, raw data of pressure from bmp085.

####Example

bmp085 = require("bmp085")
sda = 1
scl = 2
bmp085.init(sda, scl)
up = bmp085.getUP_raw(oss)
print(up)
-- Don't forget to release it after use
bmp085 = nil
package.loaded["bmp085"]=nil

####See also -

##getUT() ####Description Get temperature from bmp085.

####Syntax getUT(num_10x)

####Parameters num_10x: num_10x: bool value, if true, return number of 0.1 centi-degree. Default value is false, which return a string , eg: 16.7.

####Returns t: Integer or String, if num_10x is true, return number of 0.1 centi-degree, otherwise return a string.The temperature from bmp085.

####Example

bmp085 = require("bmp085")
sda = 1
scl = 2
bmp085.init(sda, scl)
-- Get string of temperature.
p = bmp085.getUT(false)
print(p)
-- Get number of temperature.
p = bmp085.getUT(true)
print(p)
-- Don't forget to release it after use
bmp085 = nil
package.loaded["bmp085"]=nil

####See also -

##getAL() ####Description Get estimated data of altitude from bmp085.

####Syntax getAL(oss)

####Parameters oss: over sampling setting, which is 0,1,2,3. Default value is 0.

####Returns e: Integer, estimated data of altitude. Altitudi can be calculated by pressure refer to sea level pressure, which is 101325. Pressure changes 100pa corresponds to 8.43m at sea level

####Example

bmp085 = require("bmp085")
sda = 1
scl = 2
bmp085.init(sda, scl)
-- Get string of temperature.
e = bmp085.getAL()
print(p)
-- Don't forget to release it after use
bmp085 = nil
package.loaded["bmp085"]=nil

####See also -