Anti-freeze functionality

Vicki has a built-in anti-freeze functionality based on its internal temperature readings. You can set a certain temperature threshold and if the internally measured temperature crosses it the functionality will be activated/deactivated.

If the anti-freeze functionality is active the current target temperature is overwritten by the anti-freeze target temperature and a keep-alive message is sent to notify the server (bit 3 in byte 8 in the keep-alive packet is the flag for active/inactive functionality state).

The anti-free target temperature can be set with a resolution of 1°C. When the anti-freeze functionality has been deactivated the previously set target temperature is restored.

SET

Set the anti-free functionality parameter values.

Byte index	Bit index	Hex value - Meaning
0	-	49 – The command code.
1		XX - activation threshold temperature
2		XX - deactivation threshold temperature
3		XX - anti-freeze target temperature

Example command: 0x493C5A07

3C[HEX] = 60[DEC] Activation threshold = 60 / 10 = 6°C Default value is 6° If the temperature falls below 6°C Vicki will go into anti-freeze mode setting a new target temperature.

5A[HEX] = 90[DEC] Deactivation threshold = 90 / 10 = 9°C Default value is 9°C If the temperature goes over 9°C Vicki will resume normal operation and restore its previously configured target temperature.

07[HEX] = 7[DEC] Anti-freeze target temperature = 7°C Default value is 7°C

GET

Get the anti-free functionality parameter values.

Byte index	Sent request	Received response
0	4A – Command code.	4A – The command code.
1		XX - activation threshold temperature
2		XX - deactivation threshold temperature
3		XX - anti-freeze target temperature

Example command response: 0x4A3C5A07

3C[HEX] = 60[DEC] Activation threshold = 60 / 10 = 6°C Default value is 6°C

5A[HEX] = 90[DEC] Deactivation threshold = 90 / 10 = 9°C Default value is 9°C

07[HEX] = 7[DEC] Anti-freeze target temperature = 7°C Default value is 7°C