PKGBUILD/vendor/github.com/yryz/ds18b20/README.md
Markus Pesch 6d9368e86c
fix: temperature, sensor
changes:
- sensor temperature add
- sensor temperature list
- sensor temperature rm
- temperature get
- temperature log
- temperature push
2018-11-21 19:30:14 +01:00

54 lines
1.3 KiB
Markdown

# ds18b20
Get sensor data from ds18b20 connected to the Raspberry (GPIO w1 pin).
## Usage
### Connect DS18B20
On the Raspberry Pi, you will need to add `dtoverlay=w1-gpio"` (for regular connection) or `dtoverlay=w1-gpio,pullup="y"` (for parasitic connection) to your /boot/config.txt. The default data pin is GPIO4 (RaspPi connector pin 7), but that can be changed from 4 to `x` with `dtoverlay=w1-gpio,gpiopin=x`.
Here's what I did:
```
sudo echo dtoverlay=w1-gpio-pullup,gpiopin=4 >> /boot/config.txt
sudo modprobe w1_gpio && sudo modprobe w1_therm
```
### Drivers
1-Wire drivers need to be loaded in order to create the connection between the physical sensor and the rPI.
You can load them from the terminal (or from the bin/modules.sh script).
sudo modprobe wire
sudo modprobe w1-gpio
sudo modprobe w1-therm
### Install
go get github.com/yryz/ds18b20
### Code
```go
package main
import (
"fmt"
"github.com/yryz/ds18b20"
)
func main() {
sensors, err := ds18b20.Sensors()
if err != nil {
panic(err)
}
fmt.Printf("sensor IDs: %v\n", sensors)
for _, sensor := range sensors {
t, err := ds18b20.Temperature(sensor)
if err == nil {
fmt.Printf("sensor: %s temperature: %.2f°C\n", sensor, t)
}
}
}
```