espconsole.go

// This is a console to a ESP8266 running on the device UART1.
// Allows you to type AT commands from your computer via the microcontroller.
//
// In other words:
// Your computer <--> UART0 <--> MCU <--> UART1 <--> ESP8266
//
// More information on the Espressif AT command set at:
// https://github.com/espressif/ESP8266_AT/wiki
//
package main

import (
	"machine"
	"time"

	"github.com/tinygo-org/drivers/esp8266"
)

// change these to connectc to a different UART or pins for the ESP8266
var (
	uart       = machine.UART1
	tx   uint8 = machine.D10
	rx   uint8 = machine.D11

	console = machine.UART0
)

func main() {
	uart.Configure(machine.UARTConfig{TX: tx, RX: rx})

	// Init esp8266
	wifi := esp8266.New(uart)
	wifi.Configure()

	// first check if connected
	if wifi.Connected() {
		console.Write([]byte("ESP8266 console enabled. Type a command then press enter:\r\n"))
	} else {
		console.Write([]byte("Unable to connect to esp8266.\r\n"))
	}

	input := make([]byte, 64)
	i := 0
	for {
		if console.Buffered() > 0 {
			data, _ := console.ReadByte()

			switch data {
			case 13:
				// return key
				console.Write([]byte{'\r'})

				// send command to ESP8266
				input[i] = byte('\r')
				input[i+1] = byte('\n')
				wifi.Write(input[:i+2])

				// give the ESP8266 a chance to respond.
				time.Sleep(10 * time.Millisecond)

				// display response
				console.Write(wifi.Response())

				i = 0
				continue
			default:
				// just echo the character
				console.WriteByte(data)
				input[i] = data
				i++
			}
		}
		time.Sleep(10 * time.Millisecond)
	}
}