Method onReceive

modules/io/firmata/firmataserver.js:131–200

(bytes, position)

		this.buffer = buffer.slice(position);
	}
	onReceive(bytes, position) {
		while (position < bytes.length) {
			const available = bytes.length - position;

			let command = bytes[position], channel;
			if (command < 0xF0) {
				channel = command & 0x0F;
				command &= 0xF0;
			}

			switch (command) {
				case 0x90:		// DIGITAL_MESSAGE
					if (available < 3)
						return position;

					this.doDigitalWrite(channel, (bytes[position + 1] & 0x7F) | ((bytes[position + 2] & 1) << 7));		//@@ masking may be unnecesary
					position += 3;
					break;

				case 0xC0:		// REPORT_ANALOG
					if (available < 2)
						return position;

					this.doReportAnalog(channel, bytes[position + 1]);
					position += 2;
					break;

				case 0xD0:		// REPORT_DIGITAL
					if (available < 2)
						return position;

					this.doReportDigital(channel, bytes[position + 1]);
					position += 2;
					break;

				case 0xF0: {	// SYSEX begin
					let end = position, found;
					while ((++end < bytes.length) && !found)
						found = (0xF7 === bytes[end])
					if (!found)
						return position;
					this.onSysex(bytes.slice(position + 1, end - 1));
					position = end;
					} break;

				case 0xF4:		// PIN_MODE
					if (available < 3)
						return position;
					this.doSetPinMode(bytes[position + 1], bytes[position + 2])
					position += 3;
					break;

				case 0xF9:		// REPORT_VERSION
					this.write(0xF9);
					this.write(FIRMATA_PROTOCOL_MAJOR_VERSION);
					this.write(FIRMATA_PROTOCOL_MINOR_VERSION);
					position += 1;
					break;