diff --git a/JSON-dictionary.md b/JSON-dictionary.md
index bf7231e..0888ccb 100644
--- a/JSON-dictionary.md
+++ b/JSON-dictionary.md
@@ -19,8 +19,6 @@ Certain commands are used to alter the non volatile settings stored by the contr
 | CyclicTemp | integer | 8-35 | To/From ESP | no | set point temperature **always**|
 | CyclicOff | integer | 0,2..10 | To/From ESP | **YES** | cyclic off threshold (1 is invalid) 0=disabled |
 | CyclicOn | integer | -20..0 | To/From ESP | **YES** | cyclic restart threshold |
-| Date | string | dd/mm/yyyy | To ESP | no | |
-| DateTime | string | dd/mm/yyyy HH:mm:ss | To ESP | no | |
 | ErrorState | integer | 0..11 | From ESP | n/a | |
 | ErrorString | string | "verbose description" | From ESP | n/a | |
 | FanMax | float | RPM | To/From ESP | **YES** | |
@@ -58,7 +56,6 @@ Certain commands are used to alter the non volatile settings stored by the contr
 | ThermostatOvertemp | int | 0, 2..10 | To/From ESP | **YES** | Cyclic mode <BR>Shutdown (suspend) heater if this much over set point. <BR>0 => disabled <BR>**Deprecated**|
 | ThermostatUndertemp | int | -20..0 | To/From ESP | **YES** | Cyclic mode <BR>Restart heater if this much below set point <BR>**Deprecated**|
 | ThermostatWindow | float| 0.2 ... 10.0 | To/From ESP | **YES** | degC span of thermostat window |
-| Time | string | HH:mm:ss | To ESP | no | |
 | TimerConflict | integer | timer ID | To/From ESP | | TO: test nominated timer<BR>FROM: timer in conflict |
 | TimerDays | string | # Mon,Tue,Wed,Thu,Fri,Sat,Sun,Next | To/From ESP | **YES** | # = index 1..14 |
 | TimerRefresh | integer | 1 | To/From ESP | | req/set timer info |
@@ -95,6 +92,20 @@ Certain commands are used to alter the non volatile settings stored by the contr
 | IP_STASSID | string | var | From ESP | STA mode host AP name |
 | IP_OTA | int | 0,1 | From ESP | OTA mode enabled |
 
+## MQTT
+| **Name** | **Value Type** | **Typical Values** | **Direction** | **Require NVsave** | **Note** |
+| ------ | ------ | ------ | ------ | :------: | ------ |
+| SQuery | int | 1 | To ESP | n/a | request system information from ESP |
+
+| **Name** | **Value Type** | **Typical Values** | **Direction** | **Require NVsave** | **Note** |
+| ------ | ------ | ------ | ------ | :------: | ------ |
+| Time | string | HH:mm:ss | To/From ESP | no | |
+| Date | string | dd/mm/yyyy | To/From ESP | no | |
+| DateTime | string | dd/mm/yyyy HH:mm:ss | To/From ESP | no | |
+| Uptime | integer | var | From ESP |  | seconds since last reboot |
+| SysVer | string | var | From ESP |  | Release version stamp |
+| SysDate | string | var | From ESP |  | Build date of release |
+| SysFreeMem | integer | var | From ESP |  | free memory, bytes |
 ## System Query
 
 ## Notes on timer commands