import (
"flag"
+ "time"
+ zmq "github.com/vaughan0/go-zmq"
)
var (
tty_dev_ string
pub_addr string
- use_syslog_ bool
+ use_syslog_ bool
+ enable_debug_ bool
+ serial_speed_ uint
)
+const exponential_backof_activation_threshold int64 = 4
+
func init() {
- flag.StringVar(&pub_addr, "brokeraddr", "tcp://torwaechter.realraum.at:4244", "zmq address to send stuff to")
+ flag.StringVar(&pub_addr, "brokeraddr", "tcp://torwaechter.realraum.at:4243", "zmq address to send stuff to")
flag.StringVar(&tty_dev_, "ttydev", "/dev/ttyACM0", "path do tty uc device")
+ flag.UintVar(&serial_speed_, "serspeed", 0, "tty baudrate (0 to disable setting a baudrate e.g. in case of ttyACM)")
flag.BoolVar(&use_syslog_, "syslog", false, "log to syslog local1 facility")
+ flag.BoolVar(&enable_debug_, "debug", false, "debugging messages on")
flag.Parse()
}
+func ConnectSerialToZMQ(pub_sock *zmq.Socket) {
+ defer func() {
+ if x:= recover(); x != nil { Syslog_.Println(x) }
+ }()
+
+ serial_wr, serial_rd, err := OpenAndHandleSerial(tty_dev_, serial_speed_)
+ if err != nil { panic(err) }
+ defer close(serial_wr)
+
+ for incoming_ser_line := range(serial_rd) {
+ Syslog_.Printf("%s",incoming_ser_line)
+ if err := pub_sock.Send(incoming_ser_line); err != nil { Syslog_.Println(err.Error()) }
+ }
+}
+
func main() {
zmqctx, pub_sock := ZmqsInit(pub_addr)
+ if pub_sock == nil { panic("zmq socket creation failed") }
defer zmqctx.Close()
defer pub_sock.Close()
- if use_syslog_ {
+ if enable_debug_ {
+ LogEnableDebuglog()
+ } else if use_syslog_ {
LogEnableSyslog()
Syslog_.Print("started")
}
- serial_wr, serial_rd, err := OpenAndHandleSerial(tty_dev_)
- if err != nil { panic(err) }
- defer close(serial_wr)
-
- for incoming_ser_line := range(serial_rd) {
- Syslog_.Printf("%s",incoming_ser_line)
- if err := pub_sock.Send(incoming_ser_line); err != nil { panic(err) }
+ var backoff_exp uint32 = 0
+ for {
+ start_time := time.Now().Unix()
+ ConnectSerialToZMQ(pub_sock)
+ run_time := time.Now().Unix() - start_time
+ if run_time > exponential_backof_activation_threshold {
+ backoff_exp = 0
+ }
+ time.Sleep(150*(1 << backoff_exp) * time.Millisecond)
+ if backoff_exp < 12 { backoff_exp++ }
}
}