Lorawan uplink support and new lorawan 'basic-demo' example

examples/lora/lorawan/atcmd/commands.go

@@ -4,6 +4,7 @@ import (
 	"encoding/hex"
 	"strings"
 
+	"tinygo.org/x/drivers/examples/lora/lorawan/common"
 	"tinygo.org/x/drivers/lora/lorawan"
 )
 
@@ -14,7 +15,7 @@ func quicktest() {
 
 // Check firmware version.
 func version() {
-	writeCommandOutput("VER", currentVersion()+" ("+firmwareVersion()+")")
+	writeCommandOutput("VER", common.CurrentVersion()+" ("+common.FirmwareVersion()+")")
 }
 
 // Use to check the ID of the LoRaWAN module, or change the ID.
@@ -443,7 +444,7 @@ func sendhex(data string) error {
 func recv(setting string) error {
 	cmd := "RECV"
 
-	data, err := lorarx()
+	data, err := common.Lorarx()
 	if err != nil {
 		writeCommandOutput(cmd, "ERROR "+err.Error())
 		return err
@@ -456,7 +457,7 @@ func recv(setting string) error {
 func recvhex(setting string) error {
 	cmd := "RECVHEX"
 
-	data, err := lorarx()
+	data, err := common.Lorarx()
 	if err != nil {
 		writeCommandOutput(cmd, "ERROR "+err.Error())
 		return err

examples/lora/lorawan/atcmd/main.go

@@ -12,6 +12,7 @@ import (
 	"machine"
 	"time"
 
+	"tinygo.org/x/drivers/examples/lora/lorawan/common"
 	"tinygo.org/x/drivers/lora"
 	"tinygo.org/x/drivers/lora/lorawan"
 )
@@ -34,7 +35,7 @@ func main() {
 	uart.Configure(machine.UARTConfig{TX: tx, RX: rx})
 
 	var err error
-	radio, err = setupLora()
+	radio, err = common.SetupLora()
 	if err != nil {
 		fail(err.Error())
 	}

examples/lora/lorawan/atcmd/version.go

@@ -1,7 +0,0 @@
-package main
-
-const VERSION = "0.0.1"
-
-func currentVersion() string {
-	return VERSION
-}

examples/lora/lorawan/basic-demo/README.md

@@ -0,0 +1,35 @@
+# Simple Lorawan example
+
+This demo code will connect Lorawan network and send sample uplink message
+
+You may change your Lorawan keys (AppEUI, DevEUI, AppKEY) in key-default.go
+
+
+```
+$ tinygo monitor
+Connected to /dev/ttyACM0. Press Ctrl-C to exit.
+Lorawan Simple Demo
+Start Lorawan Join sequence
+loraConnect: Connected !
+```
+
+# Building
+
+## Simulator
+
+```
+tinygo flash -target pico ./examples/lora/lorawan/basic-demo
+```
+
+## PyBadge with LoRa Featherwing 
+
+```
+tinygo flash -target pybadge -tags featherwing ./examples/lora/lorawan/basic-demo
+```
+
+## LoRa-E5 
+
+```
+tinygo flash -target lorae5 ./examples/lora/lorawan/basic-demo
+```
+

examples/lora/lorawan/basic-demo/keys-default.go

@@ -0,0 +1,11 @@
+//go:build !customkeys
+
+package main
+
+// These are sample keys, so the example builds
+// Either change here, or create a new go file and use customkeys build tag
+func setLorawanKeys() {
+	otaa.SetAppEUI([]uint8{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00})
+	otaa.SetDevEUI([]uint8{0xB3, 0xD5, 0x41, 0x00, 0x0A, 0xF1, 0xA4, 0x45})
+	otaa.SetAppKey([]uint8{0x12, 0x22, 0xA3, 0xFF, 0x0C, 0x7B, 0x76, 0x7B, 0x8F, 0xD3, 0x12, 0x4F, 0xCE, 0x7A, 0x32, 0x16})
+}

examples/lora/lorawan/basic-demo/main.go

@@ -0,0 +1,107 @@
+// Simple code for connecting to Lorawan network and uploading sample payload
+package main
+
+import (
+	"errors"
+	"strconv"
+	"time"
+
+	"tinygo.org/x/drivers/examples/lora/lorawan/common"
+	"tinygo.org/x/drivers/lora"
+	"tinygo.org/x/drivers/lora/lorawan"
+)
+
+const (
+	LORAWAN_JOIN_TIMEOUT_SEC    = 180
+	LORAWAN_RECONNECT_DELAY_SEC = 15
+	LORAWAN_UPLINK_DELAY_SEC    = 60
+)
+
+var (
+	radio   lora.Radio
+	session *lorawan.Session
+	otaa    *lorawan.Otaa
+)
+
+func loraConnect() error {
+	start := time.Now()
+	var err error
+	for time.Since(start) < LORAWAN_JOIN_TIMEOUT_SEC*time.Second {
+		println("Trying to join network")
+		err = lorawan.Join(otaa, session)
+		if err == nil {
+			println("Connected to network !")
+			return nil
+		}
+		println("Join error:", err, "retrying in", LORAWAN_RECONNECT_DELAY_SEC, "sec")
+		time.Sleep(time.Second * LORAWAN_RECONNECT_DELAY_SEC)
+	}
+
+	err = errors.New("Unable to join Lorawan network")
+	println(err.Error())
+	return err
+}
+
+func failMessage(err error) {
+	println("FATAL:", err)
+	for {
+	}
+}
+
+func main() {
+	println("*** Lorawan basic join and uplink demo ***")
+
+	// Board specific Lorawan initialization
+	var err error
+	radio, err = common.SetupLora()
+	if err != nil {
+		failMessage(err)
+	}
+
+	// Required for LoraWan operations
+	session = &lorawan.Session{}
+	otaa = &lorawan.Otaa{}
+
+	// Initial Lora modulation configuration
+	loraConf := lora.Config{
+		Freq:           868100000,
+		Bw:             lora.Bandwidth_125_0,
+		Sf:             lora.SpreadingFactor9,
+		Cr:             lora.CodingRate4_7,
+		HeaderType:     lora.HeaderExplicit,
+		Preamble:       12,
+		Ldr:            lora.LowDataRateOptimizeOff,
+		Iq:             lora.IQStandard,
+		Crc:            lora.CRCOn,
+		SyncWord:       lora.SyncPublic,
+		LoraTxPowerDBm: 20,
+	}
+	radio.LoraConfig(loraConf)
+
+	// Connect the lorawan with the Lora Radio device.
+	lorawan.UseRadio(radio)
+
+	// Configure AppEUI, DevEUI, APPKey
+	setLorawanKeys()
+
+	// Try to connect Lorawan network
+	if err := loraConnect(); err != nil {
+		failMessage(err)
+	}
+
+	// Try to periodicaly send an uplink sample message
+	upCount := 1
+	for {
+		payload := "Hello TinyGo #" + strconv.Itoa(upCount)
+
+		if err := lorawan.SendUplink([]byte(payload), session); err != nil {
+			println("Uplink error:", err)
+		} else {
+			println("Uplink success, msg=", payload)
+		}
+
+		println("Sleeping for", LORAWAN_UPLINK_DELAY_SEC, "sec")
+		time.Sleep(time.Second * LORAWAN_UPLINK_DELAY_SEC)
+		upCount++
+	}
+}

examples/lora/lorawan/common/radio.go

@@ -1,4 +1,4 @@
-package main
+package common
 
 import (
 	"errors"

examples/lora/lorawan/common/sim.go

@@ -1,11 +1,11 @@
 //go:build !featherwing && !gnse && !lorae5 && !nucleowl55jc
 
-package main
+package common
 
 import "tinygo.org/x/drivers/lora"
 
 // do simulator setup here
-func setupLora() (lora.Radio, error) {
+func SetupLora() (lora.Radio, error) {
 	return &SimLoraRadio{}, nil
 }
 
@@ -29,11 +29,12 @@ func (sr *SimLoraRadio) SetCodingRate(cr uint8)      {}
 func (sr *SimLoraRadio) SetBandwidth(bw uint8)       {}
 func (sr *SimLoraRadio) SetCrc(enable bool)          {}
 func (sr *SimLoraRadio) SetSpreadingFactor(sf uint8) {}
+func (sr *SimLoraRadio) LoraConfig(cnf lora.Config)  {}
 
-func firmwareVersion() string {
-	return "simulator " + currentVersion()
+func FirmwareVersion() string {
+	return "simulator " + CurrentVersion()
 }
 
-func lorarx() ([]byte, error) {
+func Lorarx() ([]byte, error) {
 	return nil, nil
 }

examples/lora/lorawan/common/sx126x.go

@@ -1,6 +1,6 @@
 //go:build gnse || lorae5 || nucleowl55jc
 
-package main
+package common
 
 import (
 	"device/stm32"
@@ -24,7 +24,7 @@ var (
 )
 
 // do sx126x setup here
-func setupLora() (lora.Radio, error) {
+func SetupLora() (lora.Radio, error) {
 	loraRadio = sx126x.New(machine.SPI3)
 	loraRadio.SetDeviceType(sx126x.DEVICE_TYPE_SX1262)
 
@@ -64,10 +64,10 @@ func radioIntHandler(intr interrupt.Interrupt) {
 	loraRadio.HandleInterrupt()
 }
 
-func firmwareVersion() string {
+func FirmwareVersion() string {
 	return "sx126x"
 }
 
-func lorarx() ([]byte, error) {
+func Lorarx() ([]byte, error) {
 	return loraRadio.Rx(LORA_DEFAULT_RXTIMEOUT_MS)
 }

examples/lora/lorawan/common/sx127x.go

@@ -1,6 +1,6 @@
 //go:build featherwing
 
-package main
+package common
 
 import (
 	"strconv"
@@ -28,7 +28,7 @@ var (
 )
 
 // do sx127x setup here
-func setupLora() (lora.Radio, error) {
+func SetupLora() (lora.Radio, error) {
 	rstPin.Configure(machine.PinConfig{Mode: machine.PinOutput})
 	csPin.Configure(machine.PinConfig{Mode: machine.PinOutput})
 	dio0Pin.Configure(machine.PinConfig{Mode: machine.PinInputPullup})
@@ -75,11 +75,11 @@ func dioIrqHandler(machine.Pin) {
 	loraRadio.HandleInterrupt()
 }
 
-func firmwareVersion() string {
+func FirmwareVersion() string {
 	v := loraRadio.GetVersion()
 	return "sx127x v" + strconv.Itoa(int(v))
 }
 
-func lorarx() ([]byte, error) {
+func Lorarx() ([]byte, error) {
 	return loraRadio.Rx(LORA_DEFAULT_RXTIMEOUT_MS)
 }

examples/lora/lorawan/common/version.go

@@ -0,0 +1,7 @@
+package common
+
+const VERSION = "0.0.1"
+
+func CurrentVersion() string {
+	return VERSION
+}

examples/lora/lorawan/common/wl55jc.go

@@ -13,7 +13,7 @@
 |  RX       |   HIGH   |   LOW     |    HIGH    |
 +-----------+----------+-----------+------------+
 */
-package main
+package common
 
 import (
 	"machine"

lora/lorawan/adaptor.go

@@ -71,7 +71,17 @@ func Join(otaa *Otaa, session *Session) error {
 	return nil
 }
 
-func SendUplink() error {
+func SendUplink(data []uint8, session *Session) error {
+	payload, err := session.GenMessage(0, []byte(data))
+	if err != nil {
+		return err
+	}
+	ActiveRadio.SetCrc(true)
+	ActiveRadio.SetIqMode(0) // IQ Standard
+	ActiveRadio.Tx(payload, LORA_RXTX_TIMEOUT)
+	if err != nil {
+		return err
+	}
 	return nil
 }
 

lora/lorawan/otaa.go

@@ -87,7 +87,7 @@ func (o *Otaa) GenerateJoinRequest() ([]uint8, error) {
 	o.buf = append(o.buf, 0x00)
 	o.buf = append(o.buf, reverseBytes(o.AppEUI[:])...)
 	o.buf = append(o.buf, reverseBytes(o.DevEUI[:])...)
-	o.buf = append(o.buf, reverseBytes(o.DevNonce[:])...)
+	o.buf = append(o.buf, o.DevNonce[:]...)
 	mic := genPayloadMIC(o.buf, o.AppKey)
 	o.buf = append(o.buf, mic[:]...)
 

lora/radio.go

@@ -10,4 +10,5 @@ type Radio interface {
 	SetBandwidth(bw uint8)
 	SetCrc(enable bool)
 	SetSpreadingFactor(sf uint8)
+	LoraConfig(cnf Config)
 }