mirror of
https://github.com/tinygo-org/drivers.git
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BCG
101 lines
2.4 KiB
Go
101 lines
2.4 KiB
Go
// This is a sensor station that uses a ESP32 running nina-fw over SPI.
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// It creates a UDP connection you can use to get info to/from your computer via the microcontroller.
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//
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// In other words:
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// Your computer <--> UART0 <--> MCU <--> SPI <--> ESP32
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//
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package main
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import (
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"machine"
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"strconv"
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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 hubIP = ""
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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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// this is the ESP chip that has the WIFININA firmware flashed on it
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// these are the default pins for the Arduino Nano33 IoT.
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adaptor = &wifinina.Device{
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SPI: machine.NINA_SPI,
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CS: machine.NINA_CS,
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ACK: machine.NINA_ACK,
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GPIO0: machine.NINA_GPIO0,
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RESET: machine.NINA_RESETN,
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}
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)
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func main() {
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// Init esp8266/esp32
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// Configure SPI for 8Mhz, Mode 0, MSB First
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machine.NINA_SPI.Configure(machine.SPIConfig{
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Frequency: 8 * 1e6,
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MOSI: machine.NINA_MOSI,
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MISO: machine.NINA_MISO,
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SCK: machine.NINA_SCK,
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})
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adaptor.Configure()
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// connect to access point
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connectToAP()
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// now make UDP connection
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ip := net.ParseIP(hubIP)
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raddr := &net.UDPAddr{IP: ip, Port: 2222}
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laddr := &net.UDPAddr{Port: 2222}
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println("Dialing UDP connection...")
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conn, _ := net.DialUDP("udp", laddr, raddr)
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for {
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// send data
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println("Sending data...")
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for i := 0; i < 25; i++ {
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conn.Write([]byte("hello " + strconv.Itoa(i) + "\r\n"))
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}
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time.Sleep(1000 * time.Millisecond)
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}
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// Right now this code is never reached. Need a way to trigger it...
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println("Disconnecting UDP...")
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conn.Close()
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println("Done.")
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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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