FIX: Buffer problems

Author: AJ Keller

CHANGELOG.md

@@ -1,3 +1,9 @@
+# v0.3.4
+
+### Bug Fixes 
+
+* Protect and ensure buffer returned for raw data packets
+
 # v0.3.3
 
 ### Enhancements 

package.json

@@ -1,6 +1,6 @@
 {
   "name": "openbci-utilities",
-  "version": "0.3.3",
+  "version": "0.3.4",
   "description": "The official utility package of Node.js SDK for the OpenBCI Biosensor Boards.",
   "main": "dist/openbci-utilities.js",
   "module": "src/index.js",

src/utilities.js

@@ -98,9 +98,12 @@ let utilitiesModule = {
           // Overwrite the dataBuffer with a new buffer
           let tempBuf;
           if (parsePosition > 0) {
-            tempBuf = Buffer.concat([dataBuffer.slice(0, parsePosition), dataBuffer.slice(parsePosition + k.OBCIPacketSize)], dataBuffer.byteLength - k.OBCIPacketSize);
+            tempBuf = Buffer.concat([
+              Buffer.from(dataBuffer.slice(0, parsePosition)),
+              Buffer.from(dataBuffer.slice(parsePosition + k.OBCIPacketSize))
+            ]);
           } else {
-            tempBuf = dataBuffer.slice(k.OBCIPacketSize);
+            tempBuf = Buffer.from(dataBuffer.slice(k.OBCIPacketSize));
           }
           if (tempBuf.length === 0) {
             dataBuffer = null;