/
main.go
108 lines (87 loc) · 2.17 KB
/
main.go
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// This is a sensor station that uses a ESP8266 or ESP32 running on the device UART1.
// It creates a UDP connection you can use to get info to/from your computer via the microcontroller.
//
// In other words:
// Your computer <--> UART0 <--> MCU <--> UART1 <--> ESP8266
//
package main
import (
"machine"
"time"
"tinygo.org/x/drivers/espat"
"tinygo.org/x/drivers/net"
)
// access point info
const ssid = "YOURSSID"
const pass = "YOURPASS"
// IP address of the listener aka "hub". Replace with your own info.
const hubIP = "0.0.0.0"
// these are the default pins for the Arduino Nano33 IoT.
// change these to connect to a different UART or pins for the ESP8266/ESP32
var (
uart = machine.UART1
tx = machine.PA22
rx = machine.PA23
adaptor *espat.Device
)
func main() {
uart.Configure(machine.UARTConfig{TX: tx, RX: rx})
// Init esp8266/esp32
adaptor = espat.New(uart)
adaptor.Configure()
// first check if connected
if connectToESP() {
println("Connected to wifi adaptor.")
adaptor.Echo(false)
connectToAP()
} else {
println("")
failMessage("Unable to connect to wifi adaptor.")
return
}
// now make UDP connection
ip := net.ParseIP(hubIP)
raddr := &net.UDPAddr{IP: ip, Port: 2222}
laddr := &net.UDPAddr{Port: 2222}
println("Dialing UDP connection...")
conn, _ := net.DialUDP("udp", laddr, raddr)
for {
// send data
println("Sending data...")
conn.Write([]byte("hello\r\n"))
time.Sleep(1000 * time.Millisecond)
}
// Right now this code is never reached. Need a way to trigger it...
println("Disconnecting UDP...")
conn.Close()
println("Done.")
}
// connect to ESP8266/ESP32
func connectToESP() bool {
for i := 0; i < 5; i++ {
println("Connecting to wifi adaptor...")
if adaptor.Connected() {
return true
}
time.Sleep(1 * time.Second)
}
return false
}
// connect to access point
func connectToAP() {
println("Connecting to wifi network '" + ssid + "'")
adaptor.SetWifiMode(espat.WifiModeClient)
adaptor.ConnectToAP(ssid, pass, 10)
println("Connected.")
ip, err := adaptor.GetClientIP()
if err != nil {
failMessage(err.Error())
}
println(ip)
}
func failMessage(msg string) {
for {
println(msg)
time.Sleep(1 * time.Second)
}
}