diff --git a/libs/core/_locales/core-jsdoc-strings.json b/libs/core/_locales/core-jsdoc-strings.json
index 7d9d0fed..1e635ab7 100644
--- a/libs/core/_locales/core-jsdoc-strings.json
+++ b/libs/core/_locales/core-jsdoc-strings.json
@@ -52,12 +52,14 @@
   "Boolean.toString": "Returns a string representation of an object.",
   "Buffer.fill": "Fill (a fragment) of the buffer with given value.",
   "Buffer.getNumber": "Read a number in specified format from the buffer.",
+  "Buffer.getUint8": "Reads an unsigned byte at a particular location",
   "Buffer.length": "Returns the length of a Buffer object.",
   "Buffer.rotate": "Rotate buffer left in place.\n\n\n\nstart. eg: -1",
   "Buffer.rotate|param|length": "number of elements in buffer. If negative, length is set as the buffer length minus",
   "Buffer.rotate|param|offset": "number of bytes to shift; use negative value to shift right",
   "Buffer.rotate|param|start": "start offset in buffer. Default is 0.",
   "Buffer.setNumber": "Write a number in specified format in the buffer.",
+  "Buffer.setUint8": "Writes an unsigned byte at a particular location",
   "Buffer.shift": "Shift buffer left in place, with zero padding.\n\n\n\nstart. eg: -1",
   "Buffer.shift|param|length": "number of elements in buffer. If negative, length is set as the buffer length minus",
   "Buffer.shift|param|offset": "number of bytes to shift; use negative value to shift right",
diff --git a/libs/core/_locales/core-strings.json b/libs/core/_locales/core-strings.json
index 4028ef5b..0711efcc 100644
--- a/libs/core/_locales/core-strings.json
+++ b/libs/core/_locales/core-strings.json
@@ -233,6 +233,7 @@
   "String.charAt|block": "char from %this=text|at %pos",
   "String.compare|block": "compare %this=text| to %that",
   "String.fromCharCode|block": "text from char code %code",
+  "String.isEmpty|block": "%this=text| is empty",
   "String.length|block": "length of %VALUE",
   "String.substr|block": "substring of %this=text|from %start|of length %length",
   "String|block": "String",
diff --git a/libs/core/shims.d.ts b/libs/core/shims.d.ts
index f5bc4595..d7726cef 100644
--- a/libs/core/shims.d.ts
+++ b/libs/core/shims.d.ts
@@ -884,6 +884,18 @@ declare namespace serial {
 
     //% indexerGet=BufferMethods::getByte indexerSet=BufferMethods::setByte
 declare interface Buffer {
+    /**
+     * Reads an unsigned byte at a particular location
+     */
+    //% shim=BufferMethods::getUint8
+    getUint8(off: int32): int32;
+
+    /**
+     * Writes an unsigned byte at a particular location
+     */
+    //% shim=BufferMethods::setUint8
+    setUint8(off: int32, v: int32): void;
+
     /**
      * Write a number in specified format in the buffer.
      */