42 lines
1.6 KiB
Markdown
42 lines
1.6 KiB
Markdown
# A UART to network bridge for ESP32
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- See detailed tutorial at https://mongoose.ws/tutorials/esp32/uart-bridge/
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## Flash pre-built firmware
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You can flash a pre-built firmware to the ESP32 device using the following
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instructions:
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1. Connect your ESP32 device to the workstation. It should be accessible
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via a serial port
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2. Download and unzip ESP32 flashing tool from https://mongoose.ws/downloads/esputil.zip
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3. Download a prebuilt firmware https://mongoose.ws/downloads/uart-bridge.hex into the unzipped directory
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4. Start command prompt (or terminal on Mac/Linux). Run `cd
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PATH/TO/esputil` to go into the unzipped `esputil/` directory. After that, run
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the following command (change `COMPORT` to the board's serial port):
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| OS | Command |
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| ------- | ------- |
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| Windows | <pre><code class="language-bash">.\windows\esputil -p COMPORT flash uart-bridge.hex</code></pre>|
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| Linux | <pre><code class="language-bash">./linux/esputil -p COMPORT flash uart-bridge.hex</pre> |
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| MacOS | <pre><code class="language-bash">./macos/esputil -p COMPORT flash uart-bridge.hex</code></pre> |
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Next step is to monitor and follow the instructions.
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```sh
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esputil -p COMPORT monitor
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```
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Note: if monitor command shows constant restarts, the flash parameters
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settings can be wrong. Reflash your device with `-fp ...` flash parameters
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settings. For example, WROOM-32 based boards use `-fp 0x220`:
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```sh
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esputil -p COMPORT -fp 0x220 flash uart-bridge.hex
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```
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For more on possible options for flash parameters, see
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https://github.com/cpq/esputil#flash-parameters
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