diff --git a/bbn_m5atomS3_lite_DS18B20/bbn_m5atomS3_lite_DS18B20.ino b/bbn_m5atomS3_lite_DS18B20/bbn_m5atomS3_lite_DS18B20.ino
index 19ccaee..6d4b3dd 100644
--- a/bbn_m5atomS3_lite_DS18B20/bbn_m5atomS3_lite_DS18B20.ino
+++ b/bbn_m5atomS3_lite_DS18B20/bbn_m5atomS3_lite_DS18B20.ino
@@ -20,7 +20,7 @@ void setup() {
       if (!sensors.getAddress(deviceAddress, i)) {
         gen_nmea0183_msg("$BBTXT,01,01,02,TEMPERATURE unable to find sensor address for device=%s", String(i).c_str());
       } else {
-        char str[9];
+        char str[17];
         addressToStr(deviceAddress, str);
         gen_nmea0183_msg("$BBTXT,01,01,02,TEMPERATURE found sensor address=%s", str);
       }
@@ -34,11 +34,12 @@ void byte_to_hex_ascii(unsigned char byte, char* hex_str) {
 
 void addressToStr(DeviceAddress deviceAddress, char str[9]) {
   for (uint8_t i = 0; i < 8; i++) {
-    char a;
+    char a[3];
     byte_to_hex_ascii(deviceAddress[i], &a);
-    str[i] = a;
+    str[2 * i] = a[0];
+    str[2 * i + 1] = a[1];
   }
-  str[8] = (char)0;
+  str[17] = (char)0;
 }
 
 void loop() {
@@ -48,7 +49,7 @@ void loop() {
     for (int i = 0; i < count; i++) {
       DeviceAddress deviceAddress;
       if (sensors.getAddress(deviceAddress, i)) {
-        char str[9];
+        char str[17];
         addressToStr(deviceAddress, str);
         gen_nmea0183_msg("$BBXDR,C,%s", (String(sensors.getTempCByIndex(i)) + ",C,TEMP_" + String(str)).c_str());        // C
       }