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Code.org Integration #3

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merged 3 commits into from
Feb 20, 2023
Merged

Code.org Integration #3

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e650111
Allow serialport to be overridden
Dec 12, 2019
f8dffd6
Allow the TextEncoder, TextDecoder to work in node and browser
Dec 12, 2019
119d2e1
Connecting to port return promises
Dec 12, 2019
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29 changes: 23 additions & 6 deletions client/MBFirmataClient.js
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Original file line number Diff line number Diff line change
Expand Up @@ -32,11 +32,21 @@ SOFTWARE.
* Clients can listen for DAL events, digital pin changes, or analog channel updates.
*/

const serialport = require('serialport');
const {TextEncoder, TextDecoder} = require('util');
let serialport;
let TextEncoder, TextDecoder;

// If running outside of the browser, create the TextEncoder/TextDecoder
if (typeof window === 'undefined' || !window.TextEncoder) {
TextEncoder = require('util').TextEncoder;
TextDecoder = require('util').TextDecoder;
} else {
TextEncoder = window.TextEncoder;
TextDecoder = window.TextDecoder;
}

class MicrobitFirmataClient {
constructor() {
constructor(port) {
serialport = port ? port : require('serialport');
this.addConstants();
this.myPort = null;
this.inbuf = new Uint8Array(1000);
Expand Down Expand Up @@ -109,10 +119,13 @@ class MicrobitFirmataClient {

// Connecting/Disconnecting

/**
* @returns {Promise} when port has been opened or if no port found
*/
connect() {
// Search serial port list for a connected micro:bit and, if found, open that port.

serialport.list()
return serialport.list()
.then((ports) => {
for (var i = 0; i < ports.length; i++) {
var p = ports[i];
Expand All @@ -127,13 +140,17 @@ class MicrobitFirmataClient {
// Attempt to open the serial port on the given port name.
// If this fails it will fail with an UnhandledPromiseRejectionWarning.
console.log("Opening", portName);
this.setSerialPort(new serialport(portName, { baudRate: 57600 }));
return this.setSerialPort(new serialport(portName, { baudRate: 57600 }));
} else {
console.log("No micro:bit found; is your board plugged in?");
return null;
}
});
}

/**
* @returns {Promise} when board version is set
*/
setSerialPort(port) {
// Use the given port. Assume the port has been opened by the caller.

Expand All @@ -151,7 +168,7 @@ class MicrobitFirmataClient {

// get the board serial number (used to determine board version)
this.boardVersion = '';
serialport.list()
return serialport.list()
.then((ports) => {
for (var i = 0; i < ports.length; i++) {
var p = ports[i];
Expand Down