3ca4456c2b
Separation of class LED selection and state control.
The label of the LED corresponds to the silk screen of the iot2050.
Before we use one list to enumerate all the led and its state.
like: User1 Led Red User1 Led Green User1 Led Orange
User2 Led Red User2 Led Green User2 Led Orange
if we need to add or delete the LED, we should change this list
After Separation of class LED selection and state control
one is Led selection: USER1 USER2
the other is status selection: Green Red Orange
For this structure, if the led or status changes, We don't need
to enumerate all the states.
Also there is a problem with the old version:
When we use one node to control led show green, then we use another node to control
led show red. The result we expect is led red, but the actually result is led orange.
This is caused the previous green do not turn off. State change is wrong.
This refact would also fix it.
Signed-off-by: chao zeng <chao.zeng@siemens.com>
Signed-off-by: chao zeng <chao.zeng@siemens.com>
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| .. | ||
| LICENSE | ||
| mraa-gpio-ain.html | ||
| mraa-gpio-ain.js | ||
| mraa-gpio-din.html | ||
| mraa-gpio-din.js | ||
| mraa-gpio-dout.html | ||
| mraa-gpio-dout.js | ||
| mraa-gpio-led.html | ||
| mraa-gpio-led.js | ||
| mraa-gpio-pwm.html | ||
| mraa-gpio-pwm.js | ||
| package.json | ||
| README.md | ||
node-red-node-intel-gpio
A Node-RED node to talk to an Intel Galileo or Edison running mraa.
Install
Run the following command in your Node-RED user directory - typically ~/.node-red
npm i node-red-node-intel-gpio
Usage
The Galileo or Edison must already be running Linux, and have Node-RED installed.
See the Intel Downloads for hardware / downloads for your particular board.
Ensure the latest version of mraa libraries are installed: (version 1.5 as of Sept 2015)
echo "src mraa-upm http://iotdk.intel.com/repos/1.5/intelgalactic" > /etc/opkg/mraa-upm.conf
opkg update
opkg upgrade
NOTE : This node assumes that the mraa npm is already installed globally - as it is on the Galileo and Edison boards.
If you do need to install Node-RED, you can do this as follows from the home directory of the root user
npm install -g --unsafe-perm node-red
mkdir .node-red
cd .node-red
npm install node-red-node-intel-gpio
Analogue Input Node
Monitors the selected pin for changes. It outputs on a change of value. As analogue inputs are continuously changing you can set the sample rate in ms from 20 to 65535.
Digital Input Node
Monitors the selected pin for changes. It only outputs on a change of value.
Digital Output Node
Sets the selected digital pin output high or low depending on the value of
msg.payload - expects a number or string 0 or 1.
Pulse Width Modulation (PWM) Node
The msg.payload should contain a floating point number value
between 0 (off) and 1 (fully on), or a string representation thereof.
You can set the overall period (mS) in the edit dialogue.
For servo control set the period to 20mS and vary the input between 0.05 and 0.10,
0.05 = 5% of 20mS = 1mS
0.75 = 7.5% of 20mS = 1.5mS - typical servo centre point
0.10 = 10% of 20mS = 2mS
Example
Simple flow to blink Pin 13
...tbd