Add Board.clearSysexResponse(commandByte).

lib/firmata.js

@@ -2327,6 +2327,19 @@ Board.prototype.sysexResponse = function(commandByte, handler) {
   return this;
 };
 
+/*
+ * Allow user to remove sysex response handlers.
+ *
+ * @param {number} commandByte The commandByte to disassociate with a handler
+ *                             previously set via `sysexResponse( commandByte, handler)`.
+ */
+
+Board.prototype.clearSysexResponse = function(commandByte) {
+  if (Board.SYSEX_RESPONSE[commandByte]) {
+    delete Board.SYSEX_RESPONSE[commandByte];
+  }
+};
+
 /**
  * Allow user code to send arbitrary sysex messages
  *

readme.md

@@ -580,6 +580,10 @@ accelStepper support 2, 3, and 4 wire configurations as well as step + direction
 
   - Use `Board.encode(data)` to encode data values into an array of 7-bit byte pairs.
 
+- `board.clearSysexResponse(commandByte)`
+
+  Allow user to remove sysex response handler such as one previously set through board.sysexResponse(commandByte, handler).
+
 
 ### Encode/Decode
 

test/unit/firmata.test.js

@@ -3638,6 +3638,16 @@ describe("Board: lifecycle", function() {
       done();
     });
 
+    it("allows clearing handler for SYSEX_RESPONSE command byte", function(done) {
+      Board.SYSEX_RESPONSE[0xFF] = function() {};
+
+      board.clearSysexResponse(0xFF);
+
+      assert.doesNotThrow(function() {
+        board.sysexResponse(0xFF);
+      });
+      done();
+    });
   });
 
   describe("parser", function() {