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@@ -15,7 +15,10 @@ Supported platforms: OS X, Linux, Windows, anything that runs Python
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Run the following command to flash an *aggregated* binary as is produced for example by the [cloud build service](build.md#cloud-build-service) or the [Docker image](build.md#docker-image).
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-`esptool.py --port <USB-port-with-ESP8266> write_flash 0x00000 <nodemcu-firmware>.bin`
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+`esptool.py --port <USB-port-with-ESP8266> write_flash -fm <mode> -fs <size> 0x00000 <nodemcu-firmware>.bin`
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+
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+- `mode` is `qio` for 512 kByte modules and `dio` for 4 MByte modules (`qio` might work as well, YMMV).
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+- `size` is given in bits. Specify `4m` for 512 kByte and `32m` for 4 MByte.
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## NodeMCU Flasher
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> A firmware Flash tool for NodeMCU...We are working on next version and will use QT framework. It will be cross platform and open-source.
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@@ -54,7 +57,7 @@ Download a recent SDK release, e.g. [esp_iot_sdk_v1.4.0_15_09_18.zip](http://bbs
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For [esptool](https://github.com/themadinventor/esptool) you specify another file to download at the command line.
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```
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-esptool.py write_flash 0x00000 <nodemcu-firmware>.bin 0x7c000 esp_init_data_default.bin
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+esptool.py write_flash <flash options> 0x00000 <nodemcu-firmware>.bin 0x7c000 esp_init_data_default.bin
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```
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!!! note "Note:"
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