Last week an ESP32 Development Board – WT32-SC01 with 3.5in 320×480 Multi-Touch capactive Screen, support Bluetooth & Wifi arrived from Elecrow. The development board was USD39.90 (June 2023) and appeared to be sourced from Wireless-Tag Technology.
The first step was to flash the WT32-SC01 with the latest version of the .NET nanoFramework for ESP32 devices. To get the device into “boot” mode I used a jumper wire to connect GPIO0 to ground before powering it up.
The .NET nanoFramework nanoff utility identified the device, downloaded the runtime package, and updated the device.
The next step was to run the blank NET nanoFramework sample application.
using System;
using System.Diagnostics;
using System.Threading;
namespace HelloWorld
{
public class Program
{
public static void Main()
{
Debug.WriteLine("Hello from nanoFramework!");
Thread.Sleep(Timeout.Infinite);
// Browse our samples repository: https://github.com/nanoframework/samples
// Check our documentation online: https://docs.nanoframework.net/
// Join our lively Discord community: https://discord.gg/gCyBu8T
}
}
}
The WT32-SC01 doesn’t have a user LED so I modified the .NET nanoFramework blinky sample to flash the Liquid Crystal Display(LCD) backlight.
//
// Copyright (c) .NET Foundation and Contributors
// See LICENSE file in the project root for full license information.
//
using System.Device.Gpio;
using System;
using System.Threading;
using nanoFramework.Hardware.Esp32;
namespace Blinky
{
public class Program
{
private static GpioController s_GpioController;
public static void Main()
{
s_GpioController = new GpioController();
// IO23 is LCD backlight
GpioPin led = s_GpioController.OpenPin(Gpio.IO23,PinMode.Output );
led.Write(PinValue.Low);
while (true)
{
led.Toggle();
Thread.Sleep(125);
led.Toggle();
Thread.Sleep(125);
led.Toggle();
Thread.Sleep(125);
led.Toggle();
Thread.Sleep(525);
}
}
}
}
The
Next steps getting the LCD+Touch panel and Wifi working
devMobile's blog 