/
main.go
98 lines (83 loc) · 2.3 KB
/
main.go
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// This is a sensor station that uses a ESP32 running nina-fw over SPI.
// 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 <--> SPI <--> ESP32
//
package main
import (
"machine"
"strconv"
"time"
"tinygo.org/x/drivers/net"
"tinygo.org/x/drivers/wifinina"
)
// access point info
const ssid = ""
const pass = ""
// IP address of the server aka "hub". Replace with your own info.
const hubIP = ""
var (
// this is the ESP chip that has the WIFININA firmware flashed on it
adaptor *wifinina.Device
)
func main() {
// Init esp8266/esp32
// Configure SPI for 8Mhz, Mode 0, MSB First
machine.NINA_SPI.Configure(machine.SPIConfig{
Frequency: 8 * 1e6,
SDO: machine.NINA_SDO,
SDI: machine.NINA_SDI,
SCK: machine.NINA_SCK,
})
// these are the default pins for the Arduino Nano33 IoT.
// change these to connect to a different UART or pins for the ESP8266/ESP32
adaptor = wifinina.New(machine.NINA_SPI,
machine.NINA_CS,
machine.NINA_ACK,
machine.NINA_GPIO0,
machine.NINA_RESETN)
adaptor.Configure()
// connect to access point
connectToAP()
// 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...")
for i := 0; i < 25; i++ {
conn.Write([]byte("hello " + strconv.Itoa(i) + "\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 access point
func connectToAP() {
time.Sleep(2 * time.Second)
message("Connecting to " + ssid)
adaptor.SetPassphrase(ssid, pass)
for st, _ := adaptor.GetConnectionStatus(); st != wifinina.StatusConnected; {
message("Connection status: " + st.String())
time.Sleep(1 * time.Second)
st, _ = adaptor.GetConnectionStatus()
}
message("Connected.")
time.Sleep(2 * time.Second)
ip, _, _, err := adaptor.GetIP()
for ; err != nil; ip, _, _, err = adaptor.GetIP() {
message(err.Error())
time.Sleep(1 * time.Second)
}
message(ip.String())
}
func message(msg string) {
println(msg, "\r")
}