This implementation is used in the SenseShift Web Flasher. Forked and modified from toitware/esptool.js
.
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The code is written as a library. Here is an example showcasing how you can flash an ESP32 using the library:
export type Partition = {
name: string;
data: Uint8Array;
offset: number;
};
// TODO: Here you have to specify the partitions you want to flash to the ESP32.
const partitions: Partition[] = [];
await port.open({ baudRate: 115200 });
try {
const loader = new EspLoader(port, { debug: true, logger: console });
options.logger.log("connecting...");
await loader.connect();
try {
options.logger.log("connected");
options.logger.log("writing device partitions");
const chipName = await loader.chipName();
const macAddr = await loader.macAddr();
await loader.loadStub();
await loader.setBaudRate(options.baudRate, 921600);
if (options.erase) {
options.logger.log("erasing device flash...");
await loader.eraseFlash();
options.logger.log("successfully erased device flash");
}
for (let i = 0; i < partitions.length; i++) {
options.logger.log("\nWriting partition: " + partitions[i].name);
await loader.flashData(partitions[i].data, partitions[i].offset, function (idx, cnt) {
if (options.progressCallback) {
options.progressCallback(partitions[i].name, idx, cnt);
}
});
await sleep(100);
}
options.logger.log("successfully written device partitions");
options.logger.log("flashing succeeded");
} finally {
await loader.disconnect();
}
} finally {
await port.close();
}
- Toit esptool.js: original library, this one was forked and modified from.
- Espressif esptool-js: new project with similar purpose, but still not written as a proper library.
- Adafruit Adafruit ESPTool: the source of inspration for us, big shout-out thanks for spearheading the effort. The implementation is written as an application and hard to use as a library.