README
¶
mhz19b
A Go package to allow you to communicate with MH-Z19B CO2 sensor.
MH-Z19B has UART and PWM output modes. This driver communicates in UART mode.
Sensor can be connected to a small single-board computers (like Orange Pi, Raspberry Pi and so on) or even to desktop PC. All that is needed are GPIO pins that support UART (and this should be supported by OS).
MH-Z19B documentation
Usage
package main
import (
"fmt"
"log"
"github.com/avbasyrov/mhz19b"
)
func main() {
sensor := mhz19b.New("/dev/ttyS5") // Choose correct serial device, on Windows systems it will look like "COM45"
const set2kDetectionRange = true // Sets detection range 2000ppm
const disableABC = true // Disables Automatic Baseline Correction
err := sensor.Connect(set2kDetectionRange, disableABC)
if err != nil {
log.Fatal(err)
}
co2level, err := sensor.ReadCO2()
if err != nil {
log.Fatal(err)
}
fmt.Printf("CO2 level: %d ppm\n", co2level)
}
Methods
Connect(set2kDetectionRange, disableABC bool) error
ReadCO2() (uint16, error)
Set2kDetectionRange() error
DisableABC() error
Documentation
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Index ¶
Constants ¶
This section is empty.
Variables ¶
This section is empty.
Functions ¶
This section is empty.
Types ¶
type Sensor ¶
type Sensor struct {
// contains filtered or unexported fields
}
func (*Sensor) DisableABC ¶
DisableABC - disables Automatic Baseline Correction (ABC logic function) ABC logic function refers to that sensor itself do zero point judgment and automatic calibration procedure intelligently after a continuous operation period. The automatic calibration cycle is every 24 hours after powered on. The zero point of automatic calibration is 400ppm. From July 2015, the default setting is with built-in automatic calibration function if no special request. This function is usually suitable for indoor air quality monitor such as offices, schools and homes, not suitable for greenhouse, farm and refrigeratory where this function should be off. Please do zero calibration timely, such as manual or commend calibration.
Source Files