diff --git a/README.md b/README.md
index 1897f740..054ddb05 100644
--- a/README.md
+++ b/README.md
@@ -66,6 +66,7 @@ Usage:	= Tuner options =
 	[-D] Print debug info on event (repeat for more info)
 	[-q] Quiet mode, suppress non-data messages
 	[-W] Overwrite mode, disable checks to prevent files from being overwritten
+	[-y <code>] Verify decoding of raw data (e.g. "{25}fb2dd58") with enabled devices
 	= File I/O options =
 	[-t] Test signal auto save. Use it together with analyze mode (-a -t). Creates one file per signal
 		 Note: Saves raw I/Q samples (uint8 pcm, 2 channel). Preferred mode for generating test files
diff --git a/include/pulse_demod.h b/include/pulse_demod.h
index 15e489ae..06f3615a 100755
--- a/include/pulse_demod.h
+++ b/include/pulse_demod.h
@@ -138,4 +138,14 @@ int pulse_demod_clock_bits(const pulse_data_t *pulses, struct protocol_state *de
 
 int pulse_demod_osv1(const pulse_data_t *pulses, struct protocol_state *device);
 
+
+/// Simulate demodulation using a given signal code string
+///
+/// The (optionally "0x" prefixed) hex code is processed into a bitbuffer_t.
+/// Each row is optionally prefixed with a length enclosed in braces "{}" or
+/// separated with a slash "/" character. Whitespace is ignored.
+/// Device params are disregarded.
+/// @return number of events processed
+int pulse_demod_string(const char *code, struct protocol_state *device);
+
 #endif /* INCLUDE_PULSE_DEMOD_H_ */
diff --git a/src/pulse_demod.c b/src/pulse_demod.c
index 8216c609..ecba6260 100755
--- a/src/pulse_demod.c
+++ b/src/pulse_demod.c
@@ -401,3 +401,68 @@ int pulse_demod_osv1(const pulse_data_t *pulses, struct protocol_state *device)
 	}
 	return events;
 }
+
+
+int pulse_demod_string(const char *code, struct protocol_state *device)
+{
+	int events = 0;
+	bitbuffer_t bits = {0};
+	const char *c;
+	int data = 0;
+	int width = -1;
+
+	for(c = code; *c; ++c) {
+
+		if (*c == ' ') {
+			continue;
+
+		} else if (*c == '0' && (*(c+1) == 'x' || *(c+1) == 'X')) {
+			++c;
+			continue;
+
+		} else if (*c == '{') {
+			if (bits.num_rows > 0) {
+				if (width >= 0) {
+					bits.bits_per_row[bits.num_rows - 1] = width;
+				}
+				bitbuffer_add_row(&bits);
+			}
+
+			width = strtol(c+1, (char **)&c, 0);
+			continue;
+
+		} else if (*c == '/') {
+			bitbuffer_add_row(&bits);
+			if (width >= 0) {
+				bits.bits_per_row[bits.num_rows - 2] = width;
+				width = -1;
+			}
+			continue;
+
+		} else if (*c >= '0' && *c <= '9') {
+			data = *c - '0';
+		} else if (*c >= 'A' && *c <= 'F') {
+			data = *c - 'A' + 10;
+		} else if (*c >= 'a' && *c <= 'f') {
+			data = *c - 'a' + 10;
+		}
+		bitbuffer_add_bit(&bits, data >> 3 & 0x01);
+		bitbuffer_add_bit(&bits, data >> 2 & 0x01);
+		bitbuffer_add_bit(&bits, data >> 1 & 0x01);
+		bitbuffer_add_bit(&bits, data >> 0 & 0x01);
+	}
+	if (width >= 0 && bits.num_rows > 0) {
+		bits.bits_per_row[bits.num_rows - 1] = width;
+	}
+
+	if (device->callback) {
+		events += device->callback(&bits);
+	}
+	// Debug printout
+	if(!device->callback || (debug_output && events > 0)) {
+		fprintf(stderr, "pulse_demod_pcm(): %s \n", device->name);
+		bitbuffer_print(&bits);
+	}
+
+	return events;
+}
diff --git a/src/rtl_433.c b/src/rtl_433.c
index 0e2bbcf2..3c45251a 100755
--- a/src/rtl_433.c
+++ b/src/rtl_433.c
@@ -101,7 +101,7 @@ void usage(r_device *devices) {
             "\t[-d <RTL-SDR USB device index>] (default: 0)\n"
             "\t[-g <gain>] (default: 0 for auto)\n"
             "\t[-f <frequency>] [-f...] Receive frequency(s) (default: %i Hz)\n"
-	    "\t[-H <seconds>] Hop interval for polling of multiple frequencies (default: %i seconds)\n"
+            "\t[-H <seconds>] Hop interval for polling of multiple frequencies (default: %i seconds)\n"
             "\t[-p <ppm_error] Correct rtl-sdr tuner frequency offset error (default: 0)\n"
             "\t[-s <sample rate>] Set sample rate (default: %i Hz)\n"
             "\t[-S] Force sync output (default: async)\n"
@@ -119,6 +119,7 @@ void usage(r_device *devices) {
             "\t[-D] Print debug info on event (repeat for more info)\n"
             "\t[-q] Quiet mode, suppress non-data messages\n"
             "\t[-W] Overwrite mode, disable checks to prevent files from being overwritten\n"
+            "\t[-y <code>] Verify decoding of demodulated test data (e.g. \"{25}fb2dd58\") with enabled devices\n"
             "\t= File I/O options =\n"
             "\t[-t] Test signal auto save. Use it together with analyze mode (-a -t). Creates one file per signal\n"
             "\t\t Note: Saves raw I/Q samples (uint8 pcm, 2 channel). Preferred mode for generating test files\n"
@@ -865,6 +866,7 @@ int main(int argc, char **argv) {
 #ifndef _WIN32
     struct sigaction sigact;
 #endif
+    char *test_data = NULL;
     char *out_filename = NULL;
     char *in_filename = NULL;
     FILE *in_file;
@@ -902,7 +904,7 @@ int main(int argc, char **argv) {
     demod->level_limit = DEFAULT_LEVEL_LIMIT;
     demod->hop_time = DEFAULT_HOP_TIME;
 
-    while ((opt = getopt(argc, argv, "x:z:p:DtaAI:qm:r:l:d:f:H:g:s:b:n:SR:F:C:T:UWG")) != -1) {
+    while ((opt = getopt(argc, argv, "x:z:p:DtaAI:qm:r:l:d:f:H:g:s:b:n:SR:F:C:T:UWGy:")) != -1) {
         switch (opt) {
             case 'd':
                 dev_index = atoi(optarg);
@@ -1026,6 +1028,9 @@ int main(int argc, char **argv) {
             stop_time += duration;
           }
           break;
+            case 'y':
+                test_data = optarg;
+                break;
             default:
                 usage(devices);
                 break;
@@ -1066,6 +1071,16 @@ int main(int argc, char **argv) {
         out_block_size = DEFAULT_BUF_LENGTH;
     }
 
+    if (test_data) {
+        r = 0;
+        for (i = 0; i < demod->r_dev_num; i++) {
+            if (!quiet_mode)
+                fprintf(stderr, "Verifing test data with device %s.\n", demod->r_devs[i]->name);
+            r += pulse_demod_string(test_data, demod->r_devs[i]);
+        }
+        exit(!r);
+    }
+
     if (!in_filename) {
     device_count = rtlsdr_get_device_count();
     if (!device_count) {