MirrorSave
/
nodemcu-firmware
mirror of https://github.com/nodemcu/nodemcu-firmware.git
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

Add note to BME280 docs 

A delay is required between `setup` and reading from sensor.

Fixes #1994.
This commit is contained in:
Marcel Stör 2017-08-22 22:22:36 +02:00
parent 003c2453c3
commit 0a11e84f36
1 changed files with 5 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
docs/en/modules/bme280.md
View File

@ -5,7 +5,10 @@
This module provides a simple interface to [BME280/BMP280 temperature/air presssure/humidity sensors](http://www.bosch-sensortec.com/bst/products/all_products/bme280) (Bosch Sensortec). This module provides a simple interface to [BME280/BMP280 temperature/air presssure/humidity sensors](http://www.bosch-sensortec.com/bst/products/all_products/bme280) (Bosch Sensortec).
Note that you must call [`setup()`](#bme280setup) before you can start reading values! !!! caution
Note that you must call [`setup()`](#bme280setup) before you can start reading values! Furthermore, there has to be a variable delay between some tens to hundreds of milliseconds between `setup()` and reading measurements. Instead of using a fixed delay you might also poll the sensor until data is delivered e.g. `humi()` not returning `nil` anymore.
## bme280.altitude() ## bme280.altitude()
@ -215,6 +218,7 @@ print(string.format("altitude=%s%d.%02d", curAltsgn<0 and "-" or "", curAlt/100,
``` ```
Or simpler and more efficient Or simpler and more efficient
```lua ```lua
alt=320 -- altitude of the measurement place alt=320 -- altitude of the measurement place