diff --git a/Marlin/Configuration_adv.h b/Marlin/Configuration_adv.h
index d0fd221398..a0929dc96f 100644
--- a/Marlin/Configuration_adv.h
+++ b/Marlin/Configuration_adv.h
@@ -703,9 +703,9 @@ const unsigned int dropsegments = 5; //everything with less than this number of
  * devices on the bus.
  *
  * ; Example #1
- * ; This macro send the string "Marlin" to the slave device with address 0x63
+ * ; This macro send the string "Marlin" to the slave device with address 0x63 (99)
  * ; It uses multiple M155 commands with one B<base 10> arg
- * M155 A63  ; Target slave address
+ * M155 A99  ; Target slave address
  * M155 B77  ; M
  * M155 B97  ; a
  * M155 B114 ; r
@@ -715,12 +715,12 @@ const unsigned int dropsegments = 5; //everything with less than this number of
  * M155 S1   ; Send the current buffer
  *
  * ; Example #2
- * ; Request 6 bytes from slave device with address 0x63
- * M156 A63 B5
+ * ; Request 6 bytes from slave device with address 0x63 (99)
+ * M156 A99 B5
  *
  * ; Example #3
  * ; Example serial output of a M156 request
- * echo:i2c-reply: from:63 bytes:5 data:hello
+ * echo:i2c-reply: from:99 bytes:5 data:hello
  */
 
 // @section i2cbus
diff --git a/Marlin/example_configurations/Cartesio/Configuration_adv.h b/Marlin/example_configurations/Cartesio/Configuration_adv.h
index c69dc70f05..c8d9be298e 100644
--- a/Marlin/example_configurations/Cartesio/Configuration_adv.h
+++ b/Marlin/example_configurations/Cartesio/Configuration_adv.h
@@ -703,9 +703,9 @@ const unsigned int dropsegments = 5; //everything with less than this number of
  * devices on the bus.
  *
  * ; Example #1
- * ; This macro send the string "Marlin" to the slave device with address 0x63
+ * ; This macro send the string "Marlin" to the slave device with address 0x63 (99)
  * ; It uses multiple M155 commands with one B<base 10> arg
- * M155 A63  ; Target slave address
+ * M155 A99  ; Target slave address
  * M155 B77  ; M
  * M155 B97  ; a
  * M155 B114 ; r
@@ -715,12 +715,12 @@ const unsigned int dropsegments = 5; //everything with less than this number of
  * M155 S1   ; Send the current buffer
  *
  * ; Example #2
- * ; Request 6 bytes from slave device with address 0x63
- * M156 A63 B5
+ * ; Request 6 bytes from slave device with address 0x63 (99)
+ * M156 A99 B5
  *
  * ; Example #3
  * ; Example serial output of a M156 request
- * echo:i2c-reply: from:63 bytes:5 data:hello
+ * echo:i2c-reply: from:99 bytes:5 data:hello
  */
 
 // @section i2cbus
diff --git a/Marlin/example_configurations/Felix/Configuration_adv.h b/Marlin/example_configurations/Felix/Configuration_adv.h
index 1cdad67fa3..d739c56a8f 100644
--- a/Marlin/example_configurations/Felix/Configuration_adv.h
+++ b/Marlin/example_configurations/Felix/Configuration_adv.h
@@ -703,9 +703,9 @@ const unsigned int dropsegments = 5; //everything with less than this number of
  * devices on the bus.
  *
  * ; Example #1
- * ; This macro send the string "Marlin" to the slave device with address 0x63
+ * ; This macro send the string "Marlin" to the slave device with address 0x63 (99)
  * ; It uses multiple M155 commands with one B<base 10> arg
- * M155 A63  ; Target slave address
+ * M155 A99  ; Target slave address
  * M155 B77  ; M
  * M155 B97  ; a
  * M155 B114 ; r
@@ -715,12 +715,12 @@ const unsigned int dropsegments = 5; //everything with less than this number of
  * M155 S1   ; Send the current buffer
  *
  * ; Example #2
- * ; Request 6 bytes from slave device with address 0x63
- * M156 A63 B5
+ * ; Request 6 bytes from slave device with address 0x63 (99)
+ * M156 A99 B5
  *
  * ; Example #3
  * ; Example serial output of a M156 request
- * echo:i2c-reply: from:63 bytes:5 data:hello
+ * echo:i2c-reply: from:99 bytes:5 data:hello
  */
 
 // @section i2cbus
diff --git a/Marlin/example_configurations/Hephestos/Configuration_adv.h b/Marlin/example_configurations/Hephestos/Configuration_adv.h
index 537c9f52dc..8644b5f18b 100644
--- a/Marlin/example_configurations/Hephestos/Configuration_adv.h
+++ b/Marlin/example_configurations/Hephestos/Configuration_adv.h
@@ -703,9 +703,9 @@ const unsigned int dropsegments = 5; //everything with less than this number of
  * devices on the bus.
  *
  * ; Example #1
- * ; This macro send the string "Marlin" to the slave device with address 0x63
+ * ; This macro send the string "Marlin" to the slave device with address 0x63 (99)
  * ; It uses multiple M155 commands with one B<base 10> arg
- * M155 A63  ; Target slave address
+ * M155 A99  ; Target slave address
  * M155 B77  ; M
  * M155 B97  ; a
  * M155 B114 ; r
@@ -715,12 +715,12 @@ const unsigned int dropsegments = 5; //everything with less than this number of
  * M155 S1   ; Send the current buffer
  *
  * ; Example #2
- * ; Request 6 bytes from slave device with address 0x63
- * M156 A63 B5
+ * ; Request 6 bytes from slave device with address 0x63 (99)
+ * M156 A99 B5
  *
  * ; Example #3
  * ; Example serial output of a M156 request
- * echo:i2c-reply: from:63 bytes:5 data:hello
+ * echo:i2c-reply: from:99 bytes:5 data:hello
  */
 
 // @section i2cbus
diff --git a/Marlin/example_configurations/Hephestos_2/Configuration_adv.h b/Marlin/example_configurations/Hephestos_2/Configuration_adv.h
index f5dad62f85..b52f32cfd9 100644
--- a/Marlin/example_configurations/Hephestos_2/Configuration_adv.h
+++ b/Marlin/example_configurations/Hephestos_2/Configuration_adv.h
@@ -703,9 +703,9 @@ const unsigned int dropsegments = 5; //everything with less than this number of
  * devices on the bus.
  *
  * ; Example #1
- * ; This macro send the string "Marlin" to the slave device with address 0x63
+ * ; This macro send the string "Marlin" to the slave device with address 0x63 (99)
  * ; It uses multiple M155 commands with one B<base 10> arg
- * M155 A63  ; Target slave address
+ * M155 A99  ; Target slave address
  * M155 B77  ; M
  * M155 B97  ; a
  * M155 B114 ; r
@@ -715,12 +715,12 @@ const unsigned int dropsegments = 5; //everything with less than this number of
  * M155 S1   ; Send the current buffer
  *
  * ; Example #2
- * ; Request 6 bytes from slave device with address 0x63
- * M156 A63 B5
+ * ; Request 6 bytes from slave device with address 0x63 (99)
+ * M156 A99 B5
  *
  * ; Example #3
  * ; Example serial output of a M156 request
- * echo:i2c-reply: from:63 bytes:5 data:hello
+ * echo:i2c-reply: from:99 bytes:5 data:hello
  */
 
 // @section i2cbus
diff --git a/Marlin/example_configurations/K8200/Configuration_adv.h b/Marlin/example_configurations/K8200/Configuration_adv.h
index 00f203d2a7..ea42050278 100644
--- a/Marlin/example_configurations/K8200/Configuration_adv.h
+++ b/Marlin/example_configurations/K8200/Configuration_adv.h
@@ -709,9 +709,9 @@ const unsigned int dropsegments = 2; //everything with less than this number of
  * devices on the bus.
  *
  * ; Example #1
- * ; This macro send the string "Marlin" to the slave device with address 0x63
+ * ; This macro send the string "Marlin" to the slave device with address 0x63 (99)
  * ; It uses multiple M155 commands with one B<base 10> arg
- * M155 A63  ; Target slave address
+ * M155 A99  ; Target slave address
  * M155 B77  ; M
  * M155 B97  ; a
  * M155 B114 ; r
@@ -721,12 +721,12 @@ const unsigned int dropsegments = 2; //everything with less than this number of
  * M155 S1   ; Send the current buffer
  *
  * ; Example #2
- * ; Request 6 bytes from slave device with address 0x63
- * M156 A63 B5
+ * ; Request 6 bytes from slave device with address 0x63 (99)
+ * M156 A99 B5
  *
  * ; Example #3
  * ; Example serial output of a M156 request
- * echo:i2c-reply: from:63 bytes:5 data:hello
+ * echo:i2c-reply: from:99 bytes:5 data:hello
  */
 
 // @section i2cbus
diff --git a/Marlin/example_configurations/RigidBot/Configuration_adv.h b/Marlin/example_configurations/RigidBot/Configuration_adv.h
index 9f4ef31cbd..4f38b0c4c3 100644
--- a/Marlin/example_configurations/RigidBot/Configuration_adv.h
+++ b/Marlin/example_configurations/RigidBot/Configuration_adv.h
@@ -703,9 +703,9 @@ const unsigned int dropsegments = 5; //everything with less than this number of
  * devices on the bus.
  *
  * ; Example #1
- * ; This macro send the string "Marlin" to the slave device with address 0x63
+ * ; This macro send the string "Marlin" to the slave device with address 0x63 (99)
  * ; It uses multiple M155 commands with one B<base 10> arg
- * M155 A63  ; Target slave address
+ * M155 A99  ; Target slave address
  * M155 B77  ; M
  * M155 B97  ; a
  * M155 B114 ; r
@@ -715,12 +715,12 @@ const unsigned int dropsegments = 5; //everything with less than this number of
  * M155 S1   ; Send the current buffer
  *
  * ; Example #2
- * ; Request 6 bytes from slave device with address 0x63
- * M156 A63 B5
+ * ; Request 6 bytes from slave device with address 0x63 (99)
+ * M156 A99 B5
  *
  * ; Example #3
  * ; Example serial output of a M156 request
- * echo:i2c-reply: from:63 bytes:5 data:hello
+ * echo:i2c-reply: from:99 bytes:5 data:hello
  */
 
 // @section i2cbus
diff --git a/Marlin/example_configurations/SCARA/Configuration_adv.h b/Marlin/example_configurations/SCARA/Configuration_adv.h
index add39fa3e1..489e57b19a 100644
--- a/Marlin/example_configurations/SCARA/Configuration_adv.h
+++ b/Marlin/example_configurations/SCARA/Configuration_adv.h
@@ -703,9 +703,9 @@ const unsigned int dropsegments = 5; //everything with less than this number of
  * devices on the bus.
  *
  * ; Example #1
- * ; This macro send the string "Marlin" to the slave device with address 0x63
+ * ; This macro send the string "Marlin" to the slave device with address 0x63 (99)
  * ; It uses multiple M155 commands with one B<base 10> arg
- * M155 A63  ; Target slave address
+ * M155 A99  ; Target slave address
  * M155 B77  ; M
  * M155 B97  ; a
  * M155 B114 ; r
@@ -715,12 +715,12 @@ const unsigned int dropsegments = 5; //everything with less than this number of
  * M155 S1   ; Send the current buffer
  *
  * ; Example #2
- * ; Request 6 bytes from slave device with address 0x63
- * M156 A63 B5
+ * ; Request 6 bytes from slave device with address 0x63 (99)
+ * M156 A99 B5
  *
  * ; Example #3
  * ; Example serial output of a M156 request
- * echo:i2c-reply: from:63 bytes:5 data:hello
+ * echo:i2c-reply: from:99 bytes:5 data:hello
  */
 
 // @section i2cbus
diff --git a/Marlin/example_configurations/TAZ4/Configuration_adv.h b/Marlin/example_configurations/TAZ4/Configuration_adv.h
index 96e38bc6c4..7c3bba3740 100644
--- a/Marlin/example_configurations/TAZ4/Configuration_adv.h
+++ b/Marlin/example_configurations/TAZ4/Configuration_adv.h
@@ -711,9 +711,9 @@ const unsigned int dropsegments = 5; //everything with less than this number of
  * devices on the bus.
  *
  * ; Example #1
- * ; This macro send the string "Marlin" to the slave device with address 0x63
+ * ; This macro send the string "Marlin" to the slave device with address 0x63 (99)
  * ; It uses multiple M155 commands with one B<base 10> arg
- * M155 A63  ; Target slave address
+ * M155 A99  ; Target slave address
  * M155 B77  ; M
  * M155 B97  ; a
  * M155 B114 ; r
@@ -723,12 +723,12 @@ const unsigned int dropsegments = 5; //everything with less than this number of
  * M155 S1   ; Send the current buffer
  *
  * ; Example #2
- * ; Request 6 bytes from slave device with address 0x63
- * M156 A63 B5
+ * ; Request 6 bytes from slave device with address 0x63 (99)
+ * M156 A99 B5
  *
  * ; Example #3
  * ; Example serial output of a M156 request
- * echo:i2c-reply: from:63 bytes:5 data:hello
+ * echo:i2c-reply: from:99 bytes:5 data:hello
  */
 
 // @section i2cbus
diff --git a/Marlin/example_configurations/WITBOX/Configuration_adv.h b/Marlin/example_configurations/WITBOX/Configuration_adv.h
index 537c9f52dc..8644b5f18b 100644
--- a/Marlin/example_configurations/WITBOX/Configuration_adv.h
+++ b/Marlin/example_configurations/WITBOX/Configuration_adv.h
@@ -703,9 +703,9 @@ const unsigned int dropsegments = 5; //everything with less than this number of
  * devices on the bus.
  *
  * ; Example #1
- * ; This macro send the string "Marlin" to the slave device with address 0x63
+ * ; This macro send the string "Marlin" to the slave device with address 0x63 (99)
  * ; It uses multiple M155 commands with one B<base 10> arg
- * M155 A63  ; Target slave address
+ * M155 A99  ; Target slave address
  * M155 B77  ; M
  * M155 B97  ; a
  * M155 B114 ; r
@@ -715,12 +715,12 @@ const unsigned int dropsegments = 5; //everything with less than this number of
  * M155 S1   ; Send the current buffer
  *
  * ; Example #2
- * ; Request 6 bytes from slave device with address 0x63
- * M156 A63 B5
+ * ; Request 6 bytes from slave device with address 0x63 (99)
+ * M156 A99 B5
  *
  * ; Example #3
  * ; Example serial output of a M156 request
- * echo:i2c-reply: from:63 bytes:5 data:hello
+ * echo:i2c-reply: from:99 bytes:5 data:hello
  */
 
 // @section i2cbus
diff --git a/Marlin/example_configurations/delta/biv2.5/Configuration_adv.h b/Marlin/example_configurations/delta/biv2.5/Configuration_adv.h
index b90ca6a1c9..35a745d1b3 100644
--- a/Marlin/example_configurations/delta/biv2.5/Configuration_adv.h
+++ b/Marlin/example_configurations/delta/biv2.5/Configuration_adv.h
@@ -705,9 +705,9 @@ const unsigned int dropsegments = 5; //everything with less than this number of
  * devices on the bus.
  *
  * ; Example #1
- * ; This macro send the string "Marlin" to the slave device with address 0x63
+ * ; This macro send the string "Marlin" to the slave device with address 0x63 (99)
  * ; It uses multiple M155 commands with one B<base 10> arg
- * M155 A63  ; Target slave address
+ * M155 A99  ; Target slave address
  * M155 B77  ; M
  * M155 B97  ; a
  * M155 B114 ; r
@@ -717,12 +717,12 @@ const unsigned int dropsegments = 5; //everything with less than this number of
  * M155 S1   ; Send the current buffer
  *
  * ; Example #2
- * ; Request 6 bytes from slave device with address 0x63
- * M156 A63 B5
+ * ; Request 6 bytes from slave device with address 0x63 (99)
+ * M156 A99 B5
  *
  * ; Example #3
  * ; Example serial output of a M156 request
- * echo:i2c-reply: from:63 bytes:5 data:hello
+ * echo:i2c-reply: from:99 bytes:5 data:hello
  */
 
 // @section i2cbus
diff --git a/Marlin/example_configurations/delta/generic/Configuration_adv.h b/Marlin/example_configurations/delta/generic/Configuration_adv.h
index bb3674b156..82ca2d6256 100644
--- a/Marlin/example_configurations/delta/generic/Configuration_adv.h
+++ b/Marlin/example_configurations/delta/generic/Configuration_adv.h
@@ -705,9 +705,9 @@ const unsigned int dropsegments = 5; //everything with less than this number of
  * devices on the bus.
  *
  * ; Example #1
- * ; This macro send the string "Marlin" to the slave device with address 0x63
+ * ; This macro send the string "Marlin" to the slave device with address 0x63 (99)
  * ; It uses multiple M155 commands with one B<base 10> arg
- * M155 A63  ; Target slave address
+ * M155 A99  ; Target slave address
  * M155 B77  ; M
  * M155 B97  ; a
  * M155 B114 ; r
@@ -717,12 +717,12 @@ const unsigned int dropsegments = 5; //everything with less than this number of
  * M155 S1   ; Send the current buffer
  *
  * ; Example #2
- * ; Request 6 bytes from slave device with address 0x63
- * M156 A63 B5
+ * ; Request 6 bytes from slave device with address 0x63 (99)
+ * M156 A99 B5
  *
  * ; Example #3
  * ; Example serial output of a M156 request
- * echo:i2c-reply: from:63 bytes:5 data:hello
+ * echo:i2c-reply: from:99 bytes:5 data:hello
  */
 
 // @section i2cbus
diff --git a/Marlin/example_configurations/delta/kossel_mini/Configuration_adv.h b/Marlin/example_configurations/delta/kossel_mini/Configuration_adv.h
index cfd313dcea..7a8eea0073 100644
--- a/Marlin/example_configurations/delta/kossel_mini/Configuration_adv.h
+++ b/Marlin/example_configurations/delta/kossel_mini/Configuration_adv.h
@@ -704,9 +704,9 @@ const unsigned int dropsegments = 5; //everything with less than this number of
  * devices on the bus.
  *
  * ; Example #1
- * ; This macro send the string "Marlin" to the slave device with address 0x63
+ * ; This macro send the string "Marlin" to the slave device with address 0x63 (99)
  * ; It uses multiple M155 commands with one B<base 10> arg
- * M155 A63  ; Target slave address
+ * M155 A99  ; Target slave address
  * M155 B77  ; M
  * M155 B97  ; a
  * M155 B114 ; r
@@ -716,12 +716,12 @@ const unsigned int dropsegments = 5; //everything with less than this number of
  * M155 S1   ; Send the current buffer
  *
  * ; Example #2
- * ; Request 6 bytes from slave device with address 0x63
- * M156 A63 B5
+ * ; Request 6 bytes from slave device with address 0x63 (99)
+ * M156 A99 B5
  *
  * ; Example #3
  * ; Example serial output of a M156 request
- * echo:i2c-reply: from:63 bytes:5 data:hello
+ * echo:i2c-reply: from:99 bytes:5 data:hello
  */
 
 // @section i2cbus
diff --git a/Marlin/example_configurations/delta/kossel_pro/Configuration_adv.h b/Marlin/example_configurations/delta/kossel_pro/Configuration_adv.h
index 221ddb16c3..4b51440656 100644
--- a/Marlin/example_configurations/delta/kossel_pro/Configuration_adv.h
+++ b/Marlin/example_configurations/delta/kossel_pro/Configuration_adv.h
@@ -709,9 +709,9 @@ const unsigned int dropsegments = 5; //everything with less than this number of
  * devices on the bus.
  *
  * ; Example #1
- * ; This macro send the string "Marlin" to the slave device with address 0x63
+ * ; This macro send the string "Marlin" to the slave device with address 0x63 (99)
  * ; It uses multiple M155 commands with one B<base 10> arg
- * M155 A63  ; Target slave address
+ * M155 A99  ; Target slave address
  * M155 B77  ; M
  * M155 B97  ; a
  * M155 B114 ; r
@@ -721,12 +721,12 @@ const unsigned int dropsegments = 5; //everything with less than this number of
  * M155 S1   ; Send the current buffer
  *
  * ; Example #2
- * ; Request 6 bytes from slave device with address 0x63
- * M156 A63 B5
+ * ; Request 6 bytes from slave device with address 0x63 (99)
+ * M156 A99 B5
  *
  * ; Example #3
  * ; Example serial output of a M156 request
- * echo:i2c-reply: from:63 bytes:5 data:hello
+ * echo:i2c-reply: from:99 bytes:5 data:hello
  */
 
 // @section i2cbus
diff --git a/Marlin/example_configurations/delta/kossel_xl/Configuration_adv.h b/Marlin/example_configurations/delta/kossel_xl/Configuration_adv.h
index 7286e3a697..fb59b0df4b 100644
--- a/Marlin/example_configurations/delta/kossel_xl/Configuration_adv.h
+++ b/Marlin/example_configurations/delta/kossel_xl/Configuration_adv.h
@@ -705,9 +705,9 @@ const unsigned int dropsegments = 5; //everything with less than this number of
  * devices on the bus.
  *
  * ; Example #1
- * ; This macro send the string "Marlin" to the slave device with address 0x63
+ * ; This macro send the string "Marlin" to the slave device with address 0x63 (99)
  * ; It uses multiple M155 commands with one B<base 10> arg
- * M155 A63  ; Target slave address
+ * M155 A99  ; Target slave address
  * M155 B77  ; M
  * M155 B97  ; a
  * M155 B114 ; r
@@ -717,12 +717,12 @@ const unsigned int dropsegments = 5; //everything with less than this number of
  * M155 S1   ; Send the current buffer
  *
  * ; Example #2
- * ; Request 6 bytes from slave device with address 0x63
- * M156 A63 B5
+ * ; Request 6 bytes from slave device with address 0x63 (99)
+ * M156 A99 B5
  *
  * ; Example #3
  * ; Example serial output of a M156 request
- * echo:i2c-reply: from:63 bytes:5 data:hello
+ * echo:i2c-reply: from:99 bytes:5 data:hello
  */
 
 // @section i2cbus
diff --git a/Marlin/example_configurations/makibox/Configuration_adv.h b/Marlin/example_configurations/makibox/Configuration_adv.h
index 820d9d53e3..b8c45f2cb6 100644
--- a/Marlin/example_configurations/makibox/Configuration_adv.h
+++ b/Marlin/example_configurations/makibox/Configuration_adv.h
@@ -703,9 +703,9 @@ const unsigned int dropsegments = 5; //everything with less than this number of
  * devices on the bus.
  *
  * ; Example #1
- * ; This macro send the string "Marlin" to the slave device with address 0x63
+ * ; This macro send the string "Marlin" to the slave device with address 0x63 (99)
  * ; It uses multiple M155 commands with one B<base 10> arg
- * M155 A63  ; Target slave address
+ * M155 A99  ; Target slave address
  * M155 B77  ; M
  * M155 B97  ; a
  * M155 B114 ; r
@@ -715,12 +715,12 @@ const unsigned int dropsegments = 5; //everything with less than this number of
  * M155 S1   ; Send the current buffer
  *
  * ; Example #2
- * ; Request 6 bytes from slave device with address 0x63
- * M156 A63 B5
+ * ; Request 6 bytes from slave device with address 0x63 (99)
+ * M156 A99 B5
  *
  * ; Example #3
  * ; Example serial output of a M156 request
- * echo:i2c-reply: from:63 bytes:5 data:hello
+ * echo:i2c-reply: from:99 bytes:5 data:hello
  */
 
 // @section i2cbus
diff --git a/Marlin/example_configurations/tvrrug/Round2/Configuration_adv.h b/Marlin/example_configurations/tvrrug/Round2/Configuration_adv.h
index fd96c89474..7da66c7733 100644
--- a/Marlin/example_configurations/tvrrug/Round2/Configuration_adv.h
+++ b/Marlin/example_configurations/tvrrug/Round2/Configuration_adv.h
@@ -703,9 +703,9 @@ const unsigned int dropsegments = 5; //everything with less than this number of
  * devices on the bus.
  *
  * ; Example #1
- * ; This macro send the string "Marlin" to the slave device with address 0x63
+ * ; This macro send the string "Marlin" to the slave device with address 0x63 (99)
  * ; It uses multiple M155 commands with one B<base 10> arg
- * M155 A63  ; Target slave address
+ * M155 A99  ; Target slave address
  * M155 B77  ; M
  * M155 B97  ; a
  * M155 B114 ; r
@@ -715,12 +715,12 @@ const unsigned int dropsegments = 5; //everything with less than this number of
  * M155 S1   ; Send the current buffer
  *
  * ; Example #2
- * ; Request 6 bytes from slave device with address 0x63
- * M156 A63 B5
+ * ; Request 6 bytes from slave device with address 0x63 (99)
+ * M156 A99 B5
  *
  * ; Example #3
  * ; Example serial output of a M156 request
- * echo:i2c-reply: from:63 bytes:5 data:hello
+ * echo:i2c-reply: from:99 bytes:5 data:hello
  */
 
 // @section i2cbus