mirror of
https://github.com/tinygo-org/drivers.git
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espat: add support for esp8266/esp32 Wifi adaptor AT command set with net-compatible UDP support
Signed-off-by: Ron Evans <ron@hybridgroup.com>
This commit is contained in:
Ron Evans
committed by
Ayke van Laethem
Ayke van Laethem
parent
ae53ea7d81
commit
0c2924cd77
@@ -0,0 +1,129 @@
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// This is a console to a ESP8266/ESP32 running on the device UART1.
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// Allows you to type AT commands 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 <--> UART1 <--> ESP8266 <--> INTERNET
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//
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// More information on the Espressif AT command set at:
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// https://www.espressif.com/sites/default/files/documentation/4a-esp8266_at_instruction_set_en.pdf
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//
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package main
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import (
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"machine"
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"time"
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"github.com/tinygo-org/drivers/espat"
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)
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// change actAsAP to true to act as an access point instead of connecting to one.
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const actAsAP = false
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// access point info
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const ssid = "YOURSSID"
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const pass = "YOURPASS"
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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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uart = machine.UART1
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tx uint8 = machine.D10
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rx uint8 = machine.D11
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console = machine.UART0
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adaptor *espat.Device
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)
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func main() {
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uart.Configure(machine.UARTConfig{TX: tx, RX: rx})
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// Init esp8266
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adaptor = espat.New(uart)
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adaptor.Configure()
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// first check if connected
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if adaptor.Connected() {
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adaptor.Echo(false)
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console.Write([]byte("\r\n"))
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console.Write([]byte("ESP-AT console enabled.\r\n"))
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console.Write([]byte("Firmware version:\r\n"))
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console.Write(adaptor.Version())
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console.Write([]byte("\r\n"))
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if actAsAP {
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provideAP()
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} else {
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connectToAP()
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}
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console.Write([]byte("Type an AT command then press enter:\r\n"))
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prompt()
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} else {
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console.Write([]byte("\r\n"))
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console.Write([]byte("Unable to connect to wifi adaptor.\r\n"))
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return
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}
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input := make([]byte, 64)
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i := 0
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for {
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if console.Buffered() > 0 {
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data, _ := console.ReadByte()
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switch data {
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case 13:
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// return key
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console.Write([]byte("\r\n"))
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// send command to ESP8266
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input[i] = byte('\r')
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input[i+1] = byte('\n')
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adaptor.Write(input[:i+2])
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// give the ESP8266 a chance to respond.
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time.Sleep(10 * time.Millisecond)
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// display response
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console.Write(adaptor.Response())
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// prompt
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prompt()
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i = 0
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continue
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default:
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// just echo the character
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console.WriteByte(data)
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input[i] = data
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i++
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}
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}
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time.Sleep(10 * time.Millisecond)
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}
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}
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func prompt() {
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console.Write([]byte("ESPAT>"))
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}
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// connect to access point
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func connectToAP() {
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console.Write([]byte("Connecting to wifi network...\r\n"))
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adaptor.SetWifiMode(espat.WifiModeClient)
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adaptor.ConnectToAP(ssid, pass, 10)
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console.Write([]byte("Connected.\r\n"))
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console.Write([]byte(adaptor.GetClientIP()))
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console.Write([]byte("\r\n"))
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}
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// provide access point
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func provideAP() {
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console.Write([]byte("Starting wifi network as access point '"))
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console.Write([]byte(ssid))
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console.Write([]byte("'...\r\n"))
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adaptor.SetWifiMode(espat.WifiModeAP)
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adaptor.SetAPConfig(ssid, pass, 7, espat.WifiAPSecurityWPA2_PSK)
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console.Write([]byte("Ready.\r\n"))
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console.Write([]byte(adaptor.GetAPIP()))
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console.Write([]byte("\r\n"))
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}
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@@ -0,0 +1,111 @@
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// This is a sensor hub that uses a ESP8266/ESP32 running on the device UART1.
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// It creates a UDP "server" 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 <--> UART1 <--> ESP8266 <--> INTERNET
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//
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package main
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import (
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"machine"
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"time"
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"github.com/tinygo-org/drivers/espat"
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)
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// change actAsAP to true to act as an access point instead of connecting to one.
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const actAsAP = false
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// access point info
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const ssid = "YOURSSID"
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const pass = "YOURPASS"
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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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uart = machine.UART1
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tx uint8 = machine.D10
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rx uint8 = machine.D11
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console = machine.UART0
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adaptor *espat.Device
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)
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func main() {
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uart.Configure(machine.UARTConfig{TX: tx, RX: rx})
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// Init esp8266
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adaptor = espat.New(uart)
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adaptor.Configure()
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readyled := machine.GPIO{machine.LED}
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readyled.Configure(machine.GPIOConfig{Mode: machine.GPIO_OUTPUT})
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readyled.High()
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// first check if connected
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if adaptor.Connected() {
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console.Write([]byte("Connected to wifi adaptor.\r\n"))
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adaptor.Echo(false)
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if actAsAP {
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provideAP()
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} else {
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connectToAP()
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}
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} else {
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console.Write([]byte("\r\n"))
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console.Write([]byte("Unable to connect to wifi adaptor.\r\n"))
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return
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}
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// now make UDP connection
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laddr := &espat.UDPAddr{Port: 2222}
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console.Write([]byte("Loading UDP listener...\r\n"))
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conn, _ := adaptor.ListenUDP("UDP", laddr)
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console.Write([]byte("Waiting for data...\r\n"))
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data := make([]byte, 50)
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blink := true
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for {
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n, _ := conn.Read(data)
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if n > 0 {
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console.Write(data[:n])
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console.Write([]byte("\r\n"))
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conn.Write([]byte("hello back\r\n"))
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}
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blink = !blink
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if blink {
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readyled.High()
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} else {
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readyled.Low()
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}
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time.Sleep(500 * 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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console.Write([]byte("Disconnecting UDP...\r\n"))
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conn.Close()
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console.Write([]byte("Done.\r\n"))
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}
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// connect to access point
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func connectToAP() {
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console.Write([]byte("Connecting to wifi network...\r\n"))
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adaptor.SetWifiMode(espat.WifiModeClient)
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adaptor.ConnectToAP(ssid, pass, 10)
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console.Write([]byte("Connected.\r\n"))
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console.Write([]byte(adaptor.GetClientIP()))
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console.Write([]byte("\r\n"))
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}
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// provide access point
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func provideAP() {
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console.Write([]byte("Starting wifi network as access point '"))
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console.Write([]byte(ssid))
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console.Write([]byte("'...\r\n"))
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adaptor.SetWifiMode(espat.WifiModeAP)
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adaptor.SetAPConfig(ssid, pass, 7, espat.WifiAPSecurityWPA2_PSK)
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console.Write([]byte("Ready.\r\n"))
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console.Write([]byte(adaptor.GetAPIP()))
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console.Write([]byte("\r\n"))
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}
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@@ -0,0 +1,83 @@
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// This is a sensor station that uses a ESP8266 or ESP32 running on the device UART1.
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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 <--> UART1 <--> ESP8266
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//
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package main
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import (
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"machine"
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"time"
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"github.com/tinygo-org/drivers/espat"
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)
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// access point info
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const ssid = "YOURSSID"
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const pass = "YOURPASS"
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// IP address of the listener aka "hub". Replace with your own info.
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const hubIP = "0.0.0.0"
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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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uart = machine.UART1
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tx uint8 = machine.D10
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rx uint8 = machine.D11
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console = machine.UART0
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adaptor *espat.Device
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)
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func main() {
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uart.Configure(machine.UARTConfig{TX: tx, RX: rx})
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// Init esp8266/esp32
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adaptor = espat.New(uart)
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adaptor.Configure()
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// first check if connected
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if adaptor.Connected() {
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console.Write([]byte("Connected to wifi adaptor.\r\n"))
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adaptor.Echo(false)
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connectToAP()
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} else {
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console.Write([]byte("\r\n"))
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console.Write([]byte("Unable to connect to wifi adaptor.\r\n"))
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return
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}
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// now make UDP connection
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ip := espat.ParseIP(hubIP)
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raddr := &espat.UDPAddr{IP: ip, Port: 2222}
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laddr := &espat.UDPAddr{Port: 2222}
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console.Write([]byte("Dialing UDP connection...\r\n"))
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conn, _ := adaptor.DialUDP("udp", laddr, raddr)
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for {
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// send data
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console.Write([]byte("Sending data...\r\n"))
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conn.Write([]byte("hello\r\n"))
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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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console.Write([]byte("Disconnecting UDP...\r\n"))
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conn.Close()
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console.Write([]byte("Done.\r\n"))
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}
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// connect to access point
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func connectToAP() {
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console.Write([]byte("Connecting to wifi network...\r\n"))
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adaptor.SetWifiMode(espat.WifiModeClient)
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adaptor.ConnectToAP(ssid, pass, 10)
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console.Write([]byte("Connected.\r\n"))
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console.Write([]byte(adaptor.GetClientIP()))
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console.Write([]byte("\r\n"))
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}
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