flasher.js

Flasher.js

Flasher.js is a tool to get JavaScript running natively on the Internet of Things device, ESP8266. This application runs on Windows, Mac OS X and Linux.

This tool flashes (installs) the Espruino JavaScript run time on ESP8266 EP-12 devices like the Adafruit Huzzah and Adadfruit Feather Huzzah.

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Run the GUI

npm install
npm start

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ROM Communication

The ESP8266 is notoriously finicky about being flashed, we've done our best to abstract that for you.

Here is an example of flashing the ESP8266 with the latest Espruino build.

const log = require("./logger");

const esp = new RomComm({
    portName: "/dev/cu.SLAB_USBtoUART",
    baudRate: 115200
});

esp.open().then((result) => {
    log.info("ESP is open", result);
    esp.flashAddressFromFile(0x0000, "/path/to/binaries/boot_v1.4(b1).bin")
        .then(() => esp.flashAddressFromFile(0x1000, "/path/to/binaries/espruino_esp8266_user1.bin"))
        .then(() => esp.flashAddressFromFile(0x3FC000, "/path/to/binaries/esp_init_data_default.bin"))
        .then(() => esp.flashAddressFromFile(0x3FE000, "/path/to/binaries/blank.bin"))
        .then(() => esp.close())
        .then((result) => log.info("Flashed to latest Espruino build!", result));
}).catch((error) => {
    log.error("Oh noes!", error);
});

See also RomComm.flashAddress for passing just a buffer representation of the file.

We are using Bunyan for logging, make sure to pipe it through the parser.

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Contributing

If you want to contribute to the Flasher.js clone this repo and run the following commands.

npm install
npm start