diff --git a/Shell.c b/Shell.c
index 5286bd4..e258bc7 100644
--- a/Shell.c
+++ b/Shell.c
@@ -158,7 +158,7 @@ void shell_putc(char c)
 		// Keep track of last byte
 		obhandle->buffertimer = millis();
 		// Empty buffer if it´s full before storing anything else
-		if (obhandle->buffercount >= 30) {
+		if (obhandle->buffercount >= CONFIG_SHELL_OUT_BUFFER_LEN) {
 			// Write output...
 			if (obhandle->shell_bwriter != 0)
 				obhandle->shell_bwriter(obhandle->outbuffer, obhandle->buffercount);
diff --git a/Shell.h b/Shell.h
index 1f1980f..674862c 100644
--- a/Shell.h
+++ b/Shell.h
@@ -71,6 +71,15 @@
 #define CONFIG_SHELL_FMT_BUFFER			70
 #endif
 
+/**
+ * This macro defines the length of the output buffer.  This should be large
+ * enough to accommodate most large writes via the shell_print functions, but
+ * still small enough to fit in a single shell_bwriter call (ie, UINT_8T_MAX,
+ * 255 bytes).  This buffer is also statically allocated, and should not be so
+ * large that it uses all the available RAM in the system.
+ */
+#define CONFIG_SHELL_OUT_BUFFER_LEN		30
+
 /**
  * End of user configurable parameters, do not touch anything below this line
  */
@@ -158,7 +167,7 @@ struct shell_command_entry {
 };
 
 struct shell_outbuffer_data {
-	char outbuffer[30];
+	char outbuffer[CONFIG_SHELL_OUT_BUFFER_LEN];
 	shell_bwriter_t shell_bwriter;
 	uint32_t buffertimer;
 	uint8_t buffercount;