Protocol Description
Thermolog sends data using the Modbus proto protocol. Below is a description of the protocol.
| Readable registers 0x04 – 30000 |
| Address |
Hex Address |
Parameter |
Organization |
Example Value |
Accuracy |
Example |
| 30000 |
0x00 |
Temperature |
int32 |
152 |
%0.1f |
15.2 °C |
| 30002 |
0x02 |
Humidity |
int32 |
457 |
%0.1f |
45.7 % |
| 30004 |
0x04 |
Version |
uint32 |
20201 |
%d.%02d.%02d |
2.02.01 |
| 30006 |
0x06 |
Serial |
uint32 |
7EF8E955 |
%08X |
0x7EF8E955 |
| 30008 |
0x08 |
ID 1 |
uint32 |
05D3FF31 |
%08X |
05D3FF313838553443134350
|
| 30010 |
0x0A |
ID 2
|
uint32 |
38385534 |
%08X |
| 30012 |
0x0C |
ID 3
|
uint32 |
43134350 |
%08X |
| 30014 |
0x0E |
Position Record Memory |
uint32 |
34897 |
%d |
34897 |
| Readable/Writable registers 0x03 – 40000 |
| Address |
Hex Address |
Parameter |
Organization |
Example Value |
Accuracy |
Example |
Val. Min |
Val.Max |
Default |
| 40000 |
0x00 |
Correct Temperature |
int32 |
-12 |
%0.1f |
-1.2 |
-100 |
100 |
0 |
| 40002 |
0x02 |
Correct Humidity |
int32 |
25 |
%0.1f |
2.5 |
-100 |
100 |
0 |
| 40004 |
0x04 |
Low Temp. Alarm |
int32 |
-25 |
%0.1f |
-2.5 |
-1200 |
1200 |
-1.5 |
| 40006 |
0x06 |
High Temp. Alarm |
int32 |
20 |
%0.1f |
3.0 |
-1200 |
1200 |
3.6 |
| 40008 |
0x08 |
State Alarm |
int32 |
0 |
%d |
0 |
0 |
2 |
0 |
| 40010 |
0x0A |
Modbus Address |
uint32 |
1 |
%d |
1 |
1 |
247 |
1 |
| 40012 |
0x0C |
RS485 Baudrate |
uint32 |
9600 |
%d |
9600 |
1200 |
921600 |
9600 |
| 40014 |
0x0E |
RS485 Parity |
uint32 |
0 |
%d |
0 |
0 |
2 |
0 |
| 40016 |
0x10 |
RS485 Length Bit |
uint32 |
8 |
%d |
8 |
8 |
9 |
8 |
| 40018 |
0x12 |
RS485 Stop bit |
uint32 |
1 |
%d |
1 |
0 |
3 |
1 |
| 40020 |
0x14 |
Show Type |
uint32 |
1 |
%d |
1 |
1 |
6 |
1 |
| 40022 |
0x16 |
Correct Time |
int32 |
-13 |
%0.1f |
-13 |
-120 |
120 |
-11 |
| 40024 |
0x18 |
Light |
uint32 |
- |
%d |
- |
0 |
15 |
0 |
| 40026 |
0x1A |
Year |
uint32 |
1022 |
%d |
1022 |
2022 |
2099 |
- |
| 40028 |
0x1C |
Month |
uint32 |
9 |
%d |
9 |
1 |
12 |
- |
| 40030 |
0x1E |
Day |
uint32 |
3 |
%d |
3 |
1 |
29/30/31 |
- |
| 40032 |
0x20 |
Hour |
uint32 |
15 |
%d |
15 |
0 |
23 |
- |
| 40034 |
0x22 |
Minute |
uint32 |
12 |
%d |
12 |
0 |
59 |
- |
| 40036 |
0x24 |
Second |
uint32 |
33 |
%d |
33 |
0 |
59 |
- |
Correct temperature - each temperature reading is corrected by this value
|
Correct Humidity - each humidity reading is corrected for this value
|
Low Temp. Alarm - when the temperature is lower than this value, the alarm will be triggered
|
High Temp. Alarm - when the temperature is higher than this value, the alarm will be triggered
|
State Alarm - there are three alarm states
|
| ALARM_NONE |
0 |
| ALARMYELLOW |
1 |
| ALARMRED |
2 |
Show type - determines how the temperature, humidity and time are shown on the LED display
|
Correct time - after the end of the day, the time was adjusted by this value
|
Light - brightness level of the LED display. For value 0 - the automatic brightness function is enabled.
|
Identification Device – ID1+ID2+ID3 - unique value for each device
|
Position Record Memory - position in the internal memory organization of the device for archiving the measured temperatures
|
Communication over Modbus
| Name |
Function |
Value |
| RS485 Baudrate |
From 1200 to 921600 |
9600 |
| RS485 Parity |
None |
0 |
| Odd |
1 |
| Even |
2 |
| RS485 Length Bit |
Normal |
8 |
| Extend |
9 |
| RS485 Stop bit |
0.5 |
0 |
| 0 |
1 |
| 1.5 |
2 |
| 2 |
3 |
