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73 lines
2.9 KiB
Markdown
73 lines
2.9 KiB
Markdown
# Microcontroller
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Microcontroller are small computers on an integrated circuit.
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It contains a processor, memory and programmable in- and output.
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## ESP32
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The ESP32 is a cheap and low-energy microcontroller made by Espressif Systems.
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It features Wi-Fi and [Bluetooth](/wiki/bluetooth.md).
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Some variants of this chip also include LoRa-capability and can be used to communicate via
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[Meshtastic](/wiki/meshtastic.md).
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### Usage
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The following sections address various usages and setups of the ESP32.
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### Setup in Arduino IDE
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For the ESP32 to work correctly in the Arduino IDE some things have to be set up.
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This section addresses the steps to take to use the ESP32 with the Arduino IDE.
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Under preferences set the following URL under `Additional boards manager URLs`.
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`https://raw.githubusercontent.com/espressif/arduino-esp32/gh-pages/package_esp32_index.json`
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Afterwards install the board manager `esp32`.
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### Flash Firmware on the ESP32
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This section especially focusses on the ESP32S3 microcontroller.
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Make sure that the ESP32 is in [programming mode](#programming-mode).
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For other microcontroller of the ESP32-xx family the process should be similar.
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This following guide is written for [Windows](/wiki/windows.md).
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- Download [ESP RF Test Tool and Test Guide](https://www.espressif.com/en/support/download/other-tools)
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- Download [Firmware of ESP32S3](https://files.seeedstudio.com/wiki/SeeedStudio-XIAO-ESP32S3/res/XIAO-ESP32S3-firmware-20240814.zip)
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- Open `EspRFTestTool_vX.X_Manual.exe`
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- Select the `ESP32S3` as `ChipType`
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- Select the correct `COM` for your ESP
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- Set the `BaudRate` to 115200
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- Click `open`
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- Click `Select Bin` and search for your ESP32S3 Firmware (probably named `xiao_esp32s3_firmware.bin` or similar)
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- Left of the `Select Bin` button select `USB` and `Flash` for the two drop-down options
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- Click `Load Bin`
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- After the upload of the data a completion message should appear
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- The ESP32S3 is completely flashed
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### Programming Mode
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When connecting an ESP32 to the computer it needs to be in programming mode.
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If it is not in programming mode it will show up as port but will encounter `Write Timeout` Errors
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when trying to flash programs or firmware onto it.
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To put the ESP32 in the programming mode press and hold the Boot-Button (usually labeled `B`).
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Then press and release the Reset-Button (usually labeled `R`).
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Afterwards release the Boot-Button.
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The board now should be in programming mode and it should be possible to upload and flash programs
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or firmware onto it.
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This section is based on a Reddit
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[comment by cmatkin](https://www.reddit.com/r/esp32/comments/1g8gerg/getting_a_write_timeout_error_on_my_esp32s3/).
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### Troubleshooting
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The following sections address various errors that can occur when using the ESP32.
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#### Can Not Access the Microcontroller Under Linux
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Sometimes the rights to access the ESP32 are set wrong.
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To fix this run the following command.
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```sh
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sudo chmod 777 /dev/ttyACM0
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```
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