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🌶️ - 1-Wire sample

Shows how to use the nanoFramework.Device.OneWire API to read and write from/to a 1-Wire device.

Hardware requirements

  • A .NET nanoFramework target with 1-Wire capability enabled in the firmware for example a STM32F407_DISCO or any of the ESP32 targets.

Important: make sure you properly setup the UART2 pins for ESP32 before creating the OneWireHost. For that you have add a reference to nanoFramework.Hardware.ESP32 NuGet.

///////////////////////////////////////////////////////////////////////////
// when connecting to an ESP32 device, need to configure the GPIOs for
// the COM port being used for 1-Wire.
// In .NET nanoFramework official images that's COM3.
//Configuration.SetPinFunction(21, DeviceFunction.COM3_RX);
//Configuration.SetPinFunction(22, DeviceFunction.COM3_TX);

In .NET nanoFramework official firmware builds COM3 it's used for 1-Wire host. For other devices like STM32, please make sure you're using the pre-set pins for One Wire. For STM32 devices the default it's at port C pin 10.

The code sample is demonstrative of the use of the 1-Wire API.

If you have another type of device supporting 1-Wire, you will have to adjust the pin.

Related topics

Reference

Build the sample

  1. Start Microsoft Visual Studio 2022 (VS 2019 should be OK too) and select File > Open > Project/Solution.
  2. Starting in the folder where you unzipped the samples/cloned the repository, go to the subfolder for this specific sample. Double-click the Visual Studio Solution (.sln) file.
  3. Press Ctrl+Shift+B, or select Build > Build Solution.

Run the sample

The next steps depend on whether you just want to deploy the sample or you want to both deploy and run it.

Deploying the sample

  • Select Build > Deploy Solution.

Deploying and running the sample

  • To debug the sample and then run it, press F5 or select Debug > Start Debugging.

Important: Before deploying or running the sample, please make sure your device is visible in the Device Explorer.

Tip: To display the Device Explorer, go to Visual Studio menus: View > Other Windows > Device Explorer.