tx working now too

README.md

@@ -1 +1,3 @@
 # pocsag-gateway
+
+This WIP Software aims to provide an Interface for transmitting Messages sent over AMQP via an RFM69 Transceiver.

main.go

@@ -3,7 +3,7 @@ package main
 import (
 	"fmt"
 	"time"
-	//"sync"
+	"sync"
 	"log"
 	"github.com/kgolding/go-pocsagencode"
 	"github.com/RPIZeroDuplexPOCSAG/rfm69"
@@ -17,11 +17,16 @@ import (
 )
 var (
 	conf  *settings.App
+	queueMutex sync.Mutex
 )
 var messageQueue []*pocsagencode.Message
+var lastTransmitBatch int64
 
 func queueMessage(msg *pocsagencode.Message) {
+	queueMutex.Lock()
+	lastTransmitBatch = time.Now().Unix()
 	messageQueue = append(messageQueue, msg)
+	queueMutex.Unlock()
 }
 
 func resetModem() {
@@ -61,6 +66,9 @@ func main() {
 		if err != nil {
 			log.Panic(err)
 		}
+		if _, err := consumeCh.QueueDeclare("tx_pocsag", true, false, false, false, nil); err != nil {
+			log.Panic(err)
+		}
 		go func() {
 			d, err := consumeCh.Consume("tx_pocsag", "", false, false, false, false, nil)
 			if err != nil {
@@ -69,10 +77,10 @@ func main() {
 
 			for msg := range d {
 				if msg.Headers["ric"] == nil { continue }
-				log.Printf("ric: %s", string(msg.Headers["ric"].(string)))
+				log.Printf("ric: %s", string(msg.Headers["ric"].(int64)))
 				log.Printf("msg: %s", string(msg.Body))
 				queueMessage(&pocsagencode.Message {
-					Addr: uint32(msg.Headers["ric"].(int)),
+					Addr: uint32(msg.Headers["ric"].(int64)),
 					Content: string(msg.Body),
 					IsNumeric: (msg.Headers["numeric"] != nil),
 				})
@@ -80,10 +88,6 @@ func main() {
 			}
 		}()
 	}
-	err = publishCh.ExchangeDeclare("rx", amqp.ExchangeFanout, true, false, false, false, nil)
-	if err != nil {
-		log.Panic(err)
-	}
     /***** RABBITMQ END**/
 
 	if rfm, err = rfm69.NewDevice(true); err != nil {
@@ -110,30 +114,12 @@ func main() {
 	log.Println("Frequency Offset(Correction): ", conf.FreqOffset, "Hz")
 	log.Println("Transmit Freq: ", conf.TXFreq, "Hz @", conf.TXBaud, "bps")
 	log.Println("Receive Freq: ", conf.RXFreq, "Hz @", conf.RXBaud, "bps")
-	/*
-	messages := []*pocsagencode.Message{
-		&pocsagencode.Message{133701, "Hello 1234567890!", false},
-		//&pocsagencode.Message{133702, "Hello d2efa947-7618-440c-8f79-fab32762af8ed2bb9c62-007e-4b2c-93d5-3124a247032eefe71db4-ef8d-46fb-9cf8-dac70db000bc12067966-da61-447c-a9ce-c0c24be17df5 Pager!", false},
-		//&pocsagencode.Message{133703, "Hello c41554ca-7372-4975-b0c3-3e2eaccc1e8b Pager!", false},
-		//&pocsagencode.Message{133704, "Hello Pager!", false},
-	}
-
-	log.Println("Sending", len(messages), "messages")
-	
-	var burst pocsagencode.Burst
-	for len(messages) > 220 {
-		burst, messages = pocsagencode.Generate(messages, pocsagencode.OptionMaxLen(6000))
-		// Options can be set as below for MaxLen and PreambleBits
-		// burst, messages = pocsagencode.Generate(messages, pocsagencode.OptionPreambleBits(250))
-		//log.Println("% X\n\n", burst.Bytes())
-		log.Println(len(burst.Bytes()))
-		data := &rfm69.Data{
-			Data: burst.Bytes(),
-		}
-		rfm.Send(data)
-	}
-	*/
+
 	if conf.RXFreq != 0 {
+		err = publishCh.ExchangeDeclare("rx_pocsag", amqp.ExchangeFanout, true, false, false, false, nil)
+		if err != nil {
+			log.Panic(err)
+		}
 		rfm.OnReceive = func(stream *rfm69.RXStream) {
 			rssiMeasurementArray := make([]int, 5)
 			rssiStart := -0
@@ -164,7 +150,7 @@ func main() {
 						data[i] = <-stream.ByteStream
 						//fmt.Printf("%x", data[i])
 					}
-					err := publishCh.Publish("rx", "", false, false, amqp.Publishing{
+					err := publishCh.Publish("rx_pocsag", "", false, false, amqp.Publishing{
 						ContentType: "application/octet-stream",
 						Body: data,
 						Headers: map[string]interface{} {
@@ -184,6 +170,31 @@ func main() {
 		rfm.PrepareRX()
 	}
 
+	// Only if we allow TX, we process Messages
+	if conf.TXFreq != 0 {
+		go func() {
+			lastTransmitBatch = time.Now().Unix()
+			for {
+				log.Println(time.Now().Unix(), lastTransmitBatch + 5)
+
+				time.Sleep(500 * time.Millisecond)
+				if len(messageQueue) > 0 && (time.Now().Unix() > lastTransmitBatch + 5) {
+					lastTransmitBatch = time.Now().Unix()
+					log.Println("transmitting pocsag batch")
+					queueMutex.Lock()
+					burst, _ := pocsagencode.Generate(messageQueue, pocsagencode.OptionMaxLen(6000))
+					log.Println("Transmitting", len(burst.Bytes()), "bytes")
+					data := &rfm69.Data{
+						Data: burst.Bytes(),
+					}
+					rfm.Send(data)
+					messageQueue = make([]*pocsagencode.Message, 0)
+					queueMutex.Unlock()
+					// Make Pocsag Burst
+				}
+			}
+		}()
+	}
 	rfm.Loop()
 	log.Println("Done")
 }