Reading temperature sensor
Added code to read the temperature sensor using the ds18x20 library. If the necessary drivers are not running, then the script does not try to read the temperature.
2 changed files with 22 additions and 9 deletions
+ 21
- 9
external_temperature_sensor.js
@@ -1,19 +1,31 @@ |
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| 1 | 1 |
var logger = require('winston');
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| 2 |
+var sensor = require("ds18x20")
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| 2 | 3 |
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| 3 | 4 |
module.exports.start = function(channel){
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| 4 | 5 |
logger.info("Starting External temperature module");
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| 5 |
- setInterval(function () {
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- var temperature = readSensor(); |
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- channel.emit('temperature_external', { temperature: temperature });
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- }, 1000); |
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+ var isLoaded = sensor.isDriverLoaded(); |
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+ if(isLoaded){
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+ console.log(isLoaded); |
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| 9 |
+ var devices = sensor.list(); |
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| 10 |
+ console.log(devices); |
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| 11 |
+ setInterval(function () {
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+ var temperature = readSensor(devices, channel); |
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| 13 |
+ }, 5000); |
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+ } |
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+ |
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| 9 | 16 |
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| 10 | 17 |
} |
| 11 | 18 |
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| 12 |
-function readSensor() {
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| 19 |
+function readSensor(devices) {
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| 13 | 20 |
// Read Sensor data |
| 21 |
+ sensor.get(devices[devices.length - 1], function(err, temp){
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+ if(err){
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+ console.log(err); |
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| 24 |
+ } |
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+ channel.emit('temperature_external', { temperature: temp });
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+ }); |
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| 14 | 27 |
// give random data for testing |
| 15 |
- var high = 25; |
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| 16 |
- var low = 23; |
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- var temp = Math.random() * (high - low) + low |
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| 18 |
- return temp |
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| 28 |
+ // var high = 25; |
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| 29 |
+ // var low = 23; |
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| 30 |
+ // var temp = Math.random() * (high - low) + low |
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| 19 | 31 |
} |
+ 1
- 0
package.json
@@ -10,6 +10,7 @@ |
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| 10 | 10 |
"license": "ISC", |
| 11 | 11 |
"dependencies": {
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| 12 | 12 |
"body-parser": "^1.17.2", |
| 13 |
+ "ds18x20": "^0.2.0", |
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| 13 | 14 |
"ejs": "^2.5.7", |
| 14 | 15 |
"express": "^4.15.4", |
| 15 | 16 |
"express-ejs-layouts": "^2.3.1", |