diff --git a/docs/ioRoles.md b/docs/ioRoles.md
index 6658bb886..35ddeccb7 100644
--- a/docs/ioRoles.md
+++ b/docs/ioRoles.md
@@ -86,8 +86,8 @@ Do not add anything here, as it will overwritten with next rebuild.
 | DS1820_IO | vers simple OneWire Temp sensor DS1820 |
 | PWM_ScriptOnly |  |
 | PWM_ScriptOnly_n |  |
-| Counter_f |  |
-| Counter_r |  |
+| Counter_f | Counts pulses on falling edge (transition from high to low). Each transitions adds 1 to linked channel. |
+| Counter_r | Counts pulses on rising edge (transition from low to high). Each transitions adds 1 to linked channel. |
 | IRRecv_nPup | IRRecv without pull-up |
 | StripState | This is an output pin which has current led_enableAll value |
 | StripState_n | This is an output pin which has negation of current led_enableAll value |
diff --git a/docs/json/ioRoles.json b/docs/json/ioRoles.json
index 7784f4727..fe034e333 100644
--- a/docs/json/ioRoles.json
+++ b/docs/json/ioRoles.json
@@ -650,7 +650,7 @@
   {
     "name": "Counter_f",
     "title": "TODO",
-    "descr": "",
+    "descr": "Counts pulses on falling edge (transition from high to low). Each transitions adds 1 to linked channel.",
     "enum": "IOR_Counter_f",
     "file": "new_pins.h",
     "driver": ""
@@ -658,7 +658,7 @@
   {
     "name": "Counter_r",
     "title": "TODO",
-    "descr": "",
+    "descr": "Counts pulses on rising edge (transition from low to high). Each transitions adds 1 to linked channel.",
     "enum": "IOR_Counter_r",
     "file": "new_pins.h",
     "driver": ""
diff --git a/src/new_pins.h b/src/new_pins.h
index 6e9b5e8e1..92251e51f 100644
--- a/src/new_pins.h
+++ b/src/new_pins.h
@@ -576,14 +576,14 @@ typedef enum ioRole_e {
 	IOR_PWM_ScriptOnly_n,
 	//iodetail:{"name":"Counter_f",
 	//iodetail:"title":"TODO",
-	//iodetail:"descr":"",
+	//iodetail:"descr":"Counts pulses on falling edge (transition from high to low). Each transitions adds 1 to linked channel.",
 	//iodetail:"enum":"IOR_Counter_f",
 	//iodetail:"file":"new_pins.h",
 	//iodetail:"driver":""}
 	IOR_Counter_f,
 	//iodetail:{"name":"Counter_r",
 	//iodetail:"title":"TODO",
-	//iodetail:"descr":"",
+	//iodetail:"descr":"Counts pulses on rising edge (transition from low to high). Each transitions adds 1 to linked channel.",
 	//iodetail:"enum":"IOR_Counter_r",
 	//iodetail:"file":"new_pins.h",
 	//iodetail:"driver":""}