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deadprogram
151 lines
3.3 KiB
Go
151 lines
3.3 KiB
Go
// This example opens a TCP connection using a device with WiFiNINA firmware
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// and sends a HTTP request to retrieve a webpage, based on the following
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// Arduino example:
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//
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// https://github.com/arduino-libraries/WiFiNINA/blob/master/examples/WiFiWebClientRepeating/
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//
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package main
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import (
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"fmt"
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"machine"
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"time"
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"tinygo.org/x/drivers/net"
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"tinygo.org/x/drivers/wifinina"
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)
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// access point info
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const ssid = ""
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const pass = ""
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// IP address of the server aka "hub". Replace with your own info.
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const server = "tinygo.org"
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// these are the default pins for the Arduino Nano33 IoT.
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// change these to connect to a different UART or pins for the ESP8266/ESP32
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var (
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// these are the default pins for the Arduino Nano33 IoT.
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uart = machine.UART2
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tx = machine.NINA_TX
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rx = machine.NINA_RX
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spi = machine.NINA_SPI
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// this is the ESP chip that has the WIFININA firmware flashed on it
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adaptor *wifinina.Device
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)
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var buf [256]byte
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var lastRequestTime time.Time
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var conn net.Conn
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func main() {
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uart.Configure(machine.UARTConfig{TX: tx, RX: rx})
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// Configure SPI for 8Mhz, Mode 0, MSB First
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spi.Configure(machine.SPIConfig{
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Frequency: 8 * 1e6,
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SDO: machine.NINA_SDO,
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SDI: machine.NINA_SDI,
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SCK: machine.NINA_SCK,
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})
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adaptor = wifinina.New(spi,
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machine.NINA_CS,
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machine.NINA_ACK,
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machine.NINA_GPIO0,
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machine.NINA_RESETN)
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adaptor.Configure()
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connectToAP()
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for {
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loop()
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}
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println("Done.")
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}
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func loop() {
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if conn != nil {
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for n, err := conn.Read(buf[:]); n > 0; n, err = conn.Read(buf[:]) {
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if err != nil {
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println("Read error: " + err.Error())
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} else {
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print(string(buf[0:n]))
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}
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}
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}
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if time.Now().Sub(lastRequestTime).Milliseconds() >= 10000 {
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makeHTTPRequest()
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}
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}
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func makeHTTPRequest() {
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var err error
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if conn != nil {
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conn.Close()
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}
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// make TCP connection
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ip := net.ParseIP(server)
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raddr := &net.TCPAddr{IP: ip, Port: 80}
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laddr := &net.TCPAddr{Port: 8080}
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message("\r\n---------------\r\nDialing TCP connection")
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conn, err = net.DialTCP("tcp", laddr, raddr)
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for ; err != nil; conn, err = net.DialTCP("tcp", laddr, raddr) {
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message("connection failed: " + err.Error())
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time.Sleep(5 * time.Second)
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}
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println("Connected!\r")
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print("Sending HTTP request...")
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fmt.Fprintln(conn, "GET / HTTP/1.1")
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fmt.Fprintln(conn, "Host:", server)
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fmt.Fprintln(conn, "User-Agent: TinyGo/0.10.0")
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fmt.Fprintln(conn, "Connection: close")
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fmt.Fprintln(conn)
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println("Sent!\r\n\r")
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lastRequestTime = time.Now()
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}
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func readLine(conn *net.TCPSerialConn) string {
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println("Attempting to read...\r")
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b := buf[:]
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for expiry := time.Now().Unix() + 10; time.Now().Unix() > expiry; {
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if n, err := conn.Read(b); n > 0 && err == nil {
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return string(b[0:n])
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}
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}
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return ""
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}
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// connect to access point
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func connectToAP() {
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time.Sleep(2 * time.Second)
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message("Connecting to " + ssid)
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adaptor.SetPassphrase(ssid, pass)
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for st, _ := adaptor.GetConnectionStatus(); st != wifinina.StatusConnected; {
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message("Connection status: " + st.String())
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time.Sleep(1 * time.Second)
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st, _ = adaptor.GetConnectionStatus()
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}
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message("Connected.")
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time.Sleep(2 * time.Second)
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ip, _, _, err := adaptor.GetIP()
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for ; err != nil; ip, _, _, err = adaptor.GetIP() {
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message(err.Error())
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time.Sleep(1 * time.Second)
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}
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message(ip.String())
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}
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func message(msg string) {
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println(msg, "\r")
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}
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