Error during call C.dial_DHTxx_and_read(): failed to open pin 22 direction for writing on Raspberry PI3 about go-dht HOT 7 OPEN

    // !!! Found in experimental way, that additional pause should exist
    // between export pin to work with and direction set up. Otherwise,
    // under the regular user mistake occures frequently !!!
    //
    // Sleep 150 milliseconds
    // sleep_usec(150*1000);

module dht

go 1.13

require (
        github.com/d2r2/go-dht v0.0.0-20181222061613-42fe873fbabb
        github.com/d2r2/go-logger v0.0.0-20181221090742-9998a510495e // indirect
        github.com/d2r2/go-shell v0.0.0-20190508080434-6fd313082bbf // indirect
        github.com/davecgh/go-spew v1.1.1 // indirect
)

module dht

go 1.13

require (
        github.com/d2r2/go-dht v0.0.0-20190315195559-bce0dc951e46
        github.com/d2r2/go-logger v0.0.0-20181221090742-9998a510495e // indirect
        github.com/d2r2/go-shell v0.0.0-20190508080434-6fd313082bbf // indirect
        github.com/davecgh/go-spew v1.1.1 // indirect
)

sudo ./main

pflanze@pflanzen:~/read_dht22 $ go build
pflanze@pflanzen:~/read_dht22 $ ./main 
2024-05-07T04:44:11.329 [    main] NOTICE  ***************************************************************************************************
2024-05-07T04:44:11.329 [    main] NOTICE  *** You can change verbosity of output, to modify logging level of module "dht"
2024-05-07T04:44:11.329 [    main] NOTICE  *** Uncomment/comment corresponding lines with call to ChangePackageLogLevel(...)
2024-05-07T04:44:11.329 [    main] NOTICE  ***************************************************************************************************
2024-05-07T04:44:11.330 [     dht] WARN  Error during call C.dial_DHTxx_and_read(): failed to export pin 2
2024-05-07T04:44:12.831 [     dht] WARN  Error during call C.dial_DHTxx_and_read(): failed to export pin 2
2024-05-07T04:44:14.332 [     dht] WARN  Error during call C.dial_DHTxx_and_read(): failed to export pin 2
2024-05-07T04:44:15.833 [     dht] WARN  Error during call C.dial_DHTxx_and_read(): failed to export pin 2
2024-05-07T04:44:17.334 [     dht] WARN  Error during call C.dial_DHTxx_and_read(): failed to export pin 2
2024-05-07T04:44:18.835 [     dht] WARN  Error during call C.dial_DHTxx_and_read(): failed to export pin 2
2024-05-07T04:44:20.336 [     dht] WARN  Error during call C.dial_DHTxx_and_read(): failed to export pin 2
2024-05-07T04:44:21.838 [     dht] WARN  Error during call C.dial_DHTxx_and_read(): failed to export pin 2
2024-05-07T04:44:23.339 [     dht] WARN  Error during call C.dial_DHTxx_and_read(): failed to export pin 2
2024-05-07T04:44:24.840 [     dht] WARN  Error during call C.dial_DHTxx_and_read(): failed to export pin 2
2024-05-07T04:44:26.341 [    main] FATAL  Error during call C.dial_DHTxx_and_read(): failed to export pin 2
pflanze@pflanzen:~/read_dht22 $ cat main.go 
package main
import (
        "github.com/d2r2/go-dht"
        logger "github.com/d2r2/go-logger"
)

var lg = logger.NewPackageLogger("main",
        logger.DebugLevel,
        // logger.InfoLevel,
)

func main() {
        defer logger.FinalizeLogger()

        lg.Notify("***************************************************************************************************")
        lg.Notify("*** You can change verbosity of output, to modify logging level of module \"dht\"")
        lg.Notify("*** Uncomment/comment corresponding lines with call to ChangePackageLogLevel(...)")
        lg.Notify("***************************************************************************************************")
        // Uncomment/comment next line to suppress/increase verbosity of output
        logger.ChangePackageLogLevel("dht", logger.InfoLevel)

        // sensorType := dht.DHT11
        sensorType := dht.AM2302
        // sensorType := dht.DHT12
        // Read DHT11 sensor data from specific pin, retrying 10 times in case of failure.
        pin := 2
        temperature, humidity, retried, err :=
                dht.ReadDHTxxWithRetry(sensorType, pin, false, 10)
        if err != nil {
                lg.Fatal(err)
        }
        // print temperature and humidity
        lg.Infof("Sensor = %v: Temperature = %v*C, Humidity = %v%% (retried %d times)",
                sensorType, temperature, humidity, retried)
}
pflanze@pflanzen:~/read_dht22 $ cat /proc/version 
Linux version 6.6.28+rpt-rpi-v8 ([email protected]) (gcc-12 (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40) #1 SMP PREEMPT Debian 1:6.6.28-1+rpt1 (2024-04-22)