diff --git a/qqqDALI.cpp b/qqqDALI.cpp
index 00be78e..d79c3b4 100644
--- a/qqqDALI.cpp
+++ b/qqqDALI.cpp
@@ -262,7 +262,7 @@ uint8_t Dali::_man_weight(uint8_t i) {
 }       
 
 //call with bitpos <= DALI_RX_BUF_SIZE*8-8;
-uint8_t Dali::_man_sample(uint8_t *edata, uint16_t bitpos, uint8_t *stop_coll) {
+uint8_t Dali::_man_sample(volatile uint8_t *edata, uint16_t bitpos, uint8_t *stop_coll) {
   uint8_t pos = bitpos>>3;
   uint8_t shift = bitpos & 0x7;
   uint8_t sample = (edata[pos] << shift) | (edata[pos+1] >> (8-shift));
@@ -279,7 +279,7 @@ uint8_t Dali::_man_sample(uint8_t *edata, uint16_t bitpos, uint8_t *stop_coll) {
 
 //decode 8 times oversampled encoded data
 //returns bitlen of decoded data, or 0 on collision
-uint8_t Dali::_man_decode(uint8_t *edata, uint8_t ebitlen, uint8_t *ddata) {
+uint8_t Dali::_man_decode(volatile uint8_t *edata, uint8_t ebitlen, uint8_t *ddata) {
   uint8_t dbitlen = 0;
   uint16_t ebitpos = 1;
   while(ebitpos+1<ebitlen) { 
diff --git a/qqqDALI.h b/qqqDALI.h
index 83d5f7e..3fa31c0 100644
--- a/qqqDALI.h
+++ b/qqqDALI.h
@@ -127,8 +127,8 @@ class Dali {
 
 
   uint8_t _man_weight(uint8_t i);
-  uint8_t _man_sample(uint8_t *edata, uint16_t bitpos, uint8_t *stop_coll);
-  uint8_t _man_decode(uint8_t *edata, uint8_t ebitlen, uint8_t *ddata);
+  uint8_t _man_sample(volatile uint8_t *edata, uint16_t bitpos, uint8_t *stop_coll);
+  uint8_t _man_decode(volatile uint8_t *edata, uint8_t ebitlen, uint8_t *ddata);
 
   //-------------------------------------------------
   //HIGH LEVEL PRIVATE
@@ -398,7 +398,7 @@ class Dali {
 #define DALI_QUERY_REFARENCE_RUNNING 249 //249 IEC62386-207 - Returns whetherReference System Power is in operation. (Command that exist only in IEC62386-207)
 #define DALI_QUERY_REFERENCE_MEASURMENT_FAILED 250 //250 IEC62386-207 - Returns bit7 reference measurement failed  of ‘FAILURE STATUS’ (Command that exist only in IEC62386-207)
 #define DALI_QUERY_CURRENT_PROTECTOR_ENABLE 251 //251 IEC62386-207 - Returns state of Curent protector (Command that exist only in IEC62386-207)
-#define DALI_QUERY_OPERATING_MODE 252 //252 IEC62386-207 - Returns ‘OPERATING MODE’ (Command that exist only in IEC62386-207)
+#define DALI_QUERY_OPERATING_MODE_207 252 //252 IEC62386-207 - Returns ‘OPERATING MODE’ (Command that exist only in IEC62386-207)
 #define DALI_QUERY_FAST_FADE_TIME 253 //253 IEC62386-207 - Returns set Fast fade time. (Command that exist only in IEC62386-207)
 #define DALI_QUERY_MIN_FAST_FADE_TIME 254 //254 IEC62386-207 - Returns set Minimum fast fade time (Command that exist only in IEC62386-207)
 #define DALI_QUERY_EXTENDED_VERSION_NUMBER 255 //255 IEC62386-207 - The version number of the extended support? IEC62386-207: 1, Other: NO(no response)