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43 lines
2.0 KiB
43 lines
2.0 KiB
# 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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### Flash Firmware on the ESP32
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This section especially focusses on the ESP32S3 microcontroller.
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For other microcontroller of the ESP32-xx family the process should be similar.
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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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