example to take LoRa packet and output over UDP

lilygo-t3s3-sx1280-lora2udp/go.mod

@@ -0,0 +1,18 @@
+module lilygot3s3
+
+go 1.26.2
+
+require (
+	github.com/jwetzell/osc-go v0.3.0
+	tinygo.org/x/drivers v0.35.0
+	tinygo.org/x/espradio v0.1.0
+)
+
+require (
+	github.com/google/shlex v0.0.0-20191202100458-e7afc7fbc510 // indirect
+	github.com/soypat/lneto v0.1.1-0.20260425023453-aa77403a2b32 // indirect
+)
+
+replace tinygo.org/x/drivers => /Users/jwetzell/Projects/drivers
+
+replace tinygo.org/x/espradio => /Users/jwetzell/Projects/espradio

lilygo-t3s3-sx1280-lora2udp/go.sum

@@ -0,0 +1,6 @@
+github.com/google/shlex v0.0.0-20191202100458-e7afc7fbc510 h1:El6M4kTTCOh6aBiKaUGG7oYTSPP8MxqL4YI3kZKwcP4=
+github.com/google/shlex v0.0.0-20191202100458-e7afc7fbc510/go.mod h1:pupxD2MaaD3pAXIBCelhxNneeOaAeabZDe5s4K6zSpQ=
+github.com/jwetzell/osc-go v0.3.0 h1:z75TxuQSEmdcmZ56OAepkDa3m88SdZh//3m4nBb/XZI=
+github.com/jwetzell/osc-go v0.3.0/go.mod h1:kCs329JxY6Qjga08tRQ/Gl0PqhgQzLIMpOhm6uszvIc=
+github.com/soypat/lneto v0.1.1-0.20260425023453-aa77403a2b32 h1:4fNa4mcNPVTMJ3Kzn+cS/LqmpXhKM9SiZ9Vgu/Ucq3c=
+github.com/soypat/lneto v0.1.1-0.20260425023453-aa77403a2b32/go.mod h1:Be5PjwoYukvHFiUXxpYi8+ppH2F/gw/vjGBvFdv+Ti8=

lilygo-t3s3-sx1280-lora2udp/main.go

@@ -0,0 +1,279 @@
+package main
+
+import (
+	"machine"
+	"net"
+	"runtime"
+	"sync/atomic"
+	"time"
+
+	"tinygo.org/x/drivers/lora"
+	"tinygo.org/x/drivers/netdev"
+	nl "tinygo.org/x/drivers/netlink"
+	"tinygo.org/x/drivers/sx128x"
+	link "tinygo.org/x/espradio/netlink"
+)
+
+var (
+	ssid     string
+	password string
+)
+
+func main() {
+	time.Sleep(3 * time.Second)
+
+	link := link.Esplink{}
+	netdev.UseNetdev(&link)
+
+	println("Connecting to WiFi...")
+	err := link.NetConnect(&nl.ConnectParams{
+		Ssid:       ssid,
+		Passphrase: password,
+	})
+	if err != nil {
+		panic("connect failed: " + err.Error())
+	}
+
+	conn, err := net.Dial("udp", "10.0.0.50:53000")
+	if err != nil {
+		panic("dial failed: " + err.Error())
+	}
+	defer conn.Close()
+
+	println("Connected to WiFi.")
+
+	led := machine.GPIO37
+	led.Configure(machine.PinConfig{Mode: machine.PinOutput})
+
+	spi := machine.SPI0
+	spi.Configure(machine.SPIConfig{
+		Mode:      0,
+		Frequency: 8 * 1e6,
+		SDO:       machine.GPIO6,
+		SDI:       machine.GPIO3,
+		SCK:       machine.GPIO5,
+	})
+
+	nssPin := machine.GPIO7
+	nssPin.Configure(machine.PinConfig{Mode: machine.PinOutput})
+	nssPin.Set(true)
+
+	resetPin := machine.GPIO8
+	resetPin.Configure(machine.PinConfig{Mode: machine.PinOutput})
+	resetPin.Set(true)
+
+	busyPin := machine.GPIO36
+	busyPin.Configure(machine.PinConfig{Mode: machine.PinInput})
+
+	println("initializing radio...")
+
+	radio := sx128x.New(
+		spi,
+		nssPin,
+		resetPin,
+		busyPin,
+	)
+
+	dio1Pin := machine.GPIO9
+	dio1Pin.Configure(machine.PinConfig{Mode: machine.PinInput})
+
+	txDone := atomic.Bool{}
+	txDone.Store(true)
+	rxDone := atomic.Bool{}
+	rxDone.Store(true)
+	timeout := atomic.Bool{}
+	timeout.Store(true)
+
+	dio1Pin.SetInterrupt(machine.PinRising, func(machine.Pin) {
+		irqStatus, _ := radio.GetIrqStatus()
+		println("irq status:", irqStatus)
+
+		if irqStatus&sx128x.IRQ_TX_DONE_MASK != 0 {
+			txDone.Store(true)
+			timeout.Store(false)
+			led.Set(false)
+		}
+		if irqStatus&sx128x.IRQ_RX_DONE_MASK != 0 {
+			rxDone.Store(true)
+			timeout.Store(false)
+			led.Set(true)
+			println("rx done")
+		}
+		if irqStatus&sx128x.IRQ_RX_TX_TIMEOUT_MASK != 0 {
+			timeout.Store(true)
+			txDone.Store(true)
+			rxDone.Store(true)
+			println("rx/tx timeout")
+		}
+	})
+
+	loraConfig := lora.Config{
+		Freq:           2400000000,
+		Bw:             lora.Bandwidth_1625_0,
+		Sf:             lora.SpreadingFactor9,
+		Cr:             lora.CodingRate4_7,
+		HeaderType:     sx128x.LORA_EXPLICIT_HEADER,
+		Preamble:       12,
+		Ldr:            lora.LowDataRateOptimizeOff,
+		Iq:             sx128x.LORA_IQ_STD,
+		Crc:            sx128x.LORA_CRC_DISABLE,
+		SyncWord:       0x1424,
+		LoraTxPowerDBm: 13,
+	}
+
+	radio.WaitWhileBusy()
+	SetupLora(radio, loraConfig)
+	println("radio initialized, waiting for messages...")
+
+	for {
+		runtime.Gosched()
+		if rxDone.Load() {
+			rxDone.Store(false)
+			if !timeout.Load() {
+				rxLength, rxPointer, _ := radio.GetRxBufferStatus()
+				rxData, _ := radio.ReadBuffer(rxPointer, rxLength)
+				num, err := conn.Write(rxData)
+				if err != nil {
+					println("failed to send OSC message:", err)
+				} else {
+					println("sent", num, "bytes to broker")
+				}
+
+				led.Set(false)
+			}
+			Rx(radio, loraConfig)
+			println("radio set to receive")
+		} else {
+			if dio1Pin.Get() {
+				irqStatus, _ := radio.GetIrqStatus()
+
+				if irqStatus&sx128x.IRQ_TX_DONE_MASK != 0 {
+					txDone.Store(true)
+					timeout.Store(false)
+					led.Set(false)
+				}
+				if irqStatus&sx128x.IRQ_RX_DONE_MASK != 0 {
+					rxDone.Store(true)
+					timeout.Store(false)
+					led.Set(true)
+				}
+				if irqStatus&sx128x.IRQ_RX_TX_TIMEOUT_MASK != 0 {
+					timeout.Store(true)
+					txDone.Store(true)
+					rxDone.Store(true)
+				}
+			}
+		}
+	}
+}
+
+func SetupLora(radio *sx128x.Device, config lora.Config) {
+	// Switch to standby prior to configuration changes
+
+	circuitMode, _, _ := radio.GetStatus()
+	if circuitMode != sx128x.CIRCUIT_MODE_STDBY_RC {
+		radio.SetStandby(sx128x.STANDBY_RC)
+	}
+	// Clear errors, disable radio interrupts for the moment
+	radio.SetPacketType(sx128x.PACKET_TYPE_LORA)
+	radio.SetCadParams(sx128x.LORA_CAD_08_SYMBOLS)
+	radio.SetRegulatorMode(sx128x.REGULATOR_DC_DC)
+
+	radio.SetRfFrequency(config.Freq)
+	radio.SetModulationParams(spreadingFactor(config.Sf), bandwidth(config.Bw), codingRate(config.Cr))
+
+	data := [1]uint8{}
+	if config.Sf == lora.SpreadingFactor5 || config.Sf == lora.SpreadingFactor6 {
+		data[0] = 0x1E
+	} else if config.Sf == lora.SpreadingFactor7 || config.Sf == lora.SpreadingFactor8 {
+		data[0] = 0x37
+	} else {
+		data[0] = 0x32
+	}
+	radio.WriteRegister(0x925, data[:])
+	existing, _ := radio.ReadRegister(0x93C)
+	data[0] = existing | 0x01
+	radio.WriteRegister(0x93C, data[:])
+
+	radio.SetTxParams(config.LoraTxPowerDBm, sx128x.RADIO_RAMP_02_US)
+	radio.SetPacketParamsLoRa(uint32(config.Preamble), config.HeaderType, 0xFF, config.Crc, config.Iq)
+	var syncWord [2]uint8
+	syncWord[0] = uint8(config.SyncWord >> 8)
+	syncWord[1] = uint8(config.SyncWord & 0x00FF)
+
+	radio.WriteRegister(sx128x.REG_LORA_SYNC_WORD_MSB, syncWord[:])
+}
+
+func checkStatus(radio *sx128x.Device, operation string) {
+	circuitMode, commandStatus, _ := radio.GetStatus()
+	if commandStatus != sx128x.COMMAND_STATUS_SUCCESS {
+		println(operation, "-> failed with status:", commandStatus)
+	}
+	if circuitMode != sx128x.CIRCUIT_MODE_STDBY_RC {
+		println(operation, "-> entered circuit mode:", circuitMode)
+	}
+}
+
+func Rx(radio *sx128x.Device, loraConfig lora.Config) {
+	radio.SetStandby(sx128x.STANDBY_XOSC)
+	radio.SetBufferBaseAddress(0, 0)
+	radio.SetDioIrqParams(sx128x.IRQ_RX_DONE_MASK|sx128x.IRQ_RX_TX_TIMEOUT_MASK, sx128x.IRQ_RX_DONE_MASK|sx128x.IRQ_RX_TX_TIMEOUT_MASK, 0x00, 0x00)
+	radio.ClearIrqStatus(sx128x.IRQ_ALL_MASK)
+	err := radio.SetRx(sx128x.PERIOD_BASE_4_MS, 250)
+	if err != nil {
+		println("failed to set RX mode:", err)
+	}
+}
+
+func codingRate(cr uint8) uint8 {
+	switch cr {
+	case lora.CodingRate4_5:
+		return sx128x.LORA_CR_4_5
+	case lora.CodingRate4_6:
+		return sx128x.LORA_CR_4_6
+	case lora.CodingRate4_7:
+		return sx128x.LORA_CR_4_7
+	case lora.CodingRate4_8:
+		return sx128x.LORA_CR_4_8
+	default:
+		return 0
+	}
+}
+
+func spreadingFactor(sf uint8) uint8 {
+	switch sf {
+	case lora.SpreadingFactor5:
+		return sx128x.LORA_SF_5
+	case lora.SpreadingFactor6:
+		return sx128x.LORA_SF_6
+	case lora.SpreadingFactor7:
+		return sx128x.LORA_SF_7
+	case lora.SpreadingFactor8:
+		return sx128x.LORA_SF_8
+	case lora.SpreadingFactor9:
+		return sx128x.LORA_SF_9
+	case lora.SpreadingFactor10:
+		return sx128x.LORA_SF_10
+	case lora.SpreadingFactor11:
+		return sx128x.LORA_SF_11
+	case lora.SpreadingFactor12:
+		return sx128x.LORA_SF_12
+	default:
+		return 0
+	}
+}
+
+func bandwidth(bw uint8) uint8 {
+	switch bw {
+	case lora.Bandwidth_1625_0:
+		return sx128x.LORA_BW_1600
+	case lora.Bandwidth_812_5:
+		return sx128x.LORA_BW_800
+	case lora.Bandwidth_406_25:
+		return sx128x.LORA_BW_400
+	case lora.Bandwidth_203_125:
+		return sx128x.LORA_BW_200
+	default:
+		return 0
+	}
+}

lilygo-t3s3-sx128x/main.go

@@ -66,12 +66,13 @@ func main() {
 	timeout.Store(true)
 
 	dio1Pin.SetInterrupt(machine.PinRising, func(machine.Pin) {
-		irqStatus := radio.GetIrqStatus()
+		irqStatus, _ := radio.GetIrqStatus()
 
 		if irqStatus&sx128x.IRQ_TX_DONE_MASK != 0 {
 			txDone.Store(true)
 			timeout.Store(false)
 			led.Set(false)
+			println("tx done")
 		}
 		if irqStatus&sx128x.IRQ_RX_DONE_MASK != 0 {
 			rxDone.Store(true)
@@ -103,13 +104,8 @@ func main() {
 	SetupLora(radio, loraConfig)
 
 	oscMessage := osc.OSCMessage{
-		Address: "/lora/button",
+		Address: "/cue/1/go",
-		Args: []osc.OSCArg{
+		Args:    []osc.OSCArg{},
-			{
-				Type:  "i",
-				Value: 0,
-			},
-		},
 	}
 
 	for {
@@ -120,7 +116,6 @@ func main() {
 			radio.SetStandby(sx128x.STANDBY_RC)
 			led.Set(true)
 
-			oscMessage.Args[0].Value = int32(time.Now().UnixMilli() / 1000)
 			bytes, err := oscMessage.ToBytes()
 			if err != nil {
 				println("failed to serialize OSC message:", err)
@@ -163,7 +158,7 @@ func main() {
 func SetupLora(radio *sx128x.Device, config lora.Config) {
 	// Switch to standby prior to configuration changes
 
-	circuitMode, _ := radio.GetStatus()
+	circuitMode, _, _ := radio.GetStatus()
 	if circuitMode != sx128x.CIRCUIT_MODE_STDBY_RC {
 		radio.SetStandby(sx128x.STANDBY_RC)
 	}
@@ -184,7 +179,7 @@ func SetupLora(radio *sx128x.Device, config lora.Config) {
 		data[0] = 0x32
 	}
 	radio.WriteRegister(0x925, data[:])
-	existing := radio.ReadRegister(0x93C)
+	existing, _ := radio.ReadRegister(0x93C)
 	data[0] = existing | 0x01
 	radio.WriteRegister(0x93C, data[:])
 
@@ -199,7 +194,7 @@ func SetupLora(radio *sx128x.Device, config lora.Config) {
 }
 
 func checkStatus(radio *sx128x.Device, operation string) {
-	circuitMode, commandStatus := radio.GetStatus()
+	circuitMode, commandStatus, _ := radio.GetStatus()
 	if commandStatus != sx128x.COMMAND_STATUS_SUCCESS {
 		println(operation, "-> failed with status:", commandStatus)
 	}