MESIT Devices communication protocol

• 0 - Correct level meter function
• 1 - Short-circuit in the tubes or water in the tank
• 2 - Compensation sensor defect.
• 3 - Mechanical defect on the tubes.
• 4 - Permittivity out of limits. (outside the 2-4 interval)
• 5 - Operating temperature exceeded. (outside the -40°C…80°C interval)
• 6 - Compensation sensor position not preset. 
• 7 - Analogue output error. 
• 8 - Error of communication with slave probe 
• 9 - Water presence. (between 3 and 60 seconds)
• 10 - Water in the tank (over 60 seconds)

Identification - text part of the serial number (two characters).

Identification - numeric part of the serial number (2-byte value 0-65535).

Identification - 9-character product number (tested sample had "LM1.21345").

Identification - 8-character firmware version (tested sample had "LM1-2.50").

Calibration - clear the current calibration curve by entering an empty value "".

Calibration - write a new calibration curve. In the value of the I/O tag it is necessary to enter individual bytes in decimal form, which are separated by a "#" character.
A byte pair always represents one volume value as a 16-bit number (lower byte, higher byte). The first half of the values ​​corresponds to the real volume of fuel in the tank, the second half of the values ​​corresponds to the volume values ​​measured during calibration. Example:
writing  value "100#0#200#0#44#1#144#1#244#1#88#2#188#2#32#3#132#3#232#3#113#0#216#0#62#1#144#1#254#1#70#2#204#2#17#3#126#3#249#3"
means sending volumes of 100, 200, 300, 400, 500, 600, 700, 800, 900, 1000, 113, 216, 318, 400, 510, 582, 716, 785, 894, 1017.
Of this, the first half of the values ​​are the amounts of fuel refueled in the tank:
100, 200, 300, 400, 500, 600, 700, 800, 900, 1000
and the other half are the values ​​measured by the level meter during calibration:
113, 216, 318, 400, 510, 582, 716, 785, 894, 1017
Note: the calibration is not in the official documentation of MESIT.

Time filter - hardening of the time filter. A value of TRUE means that it is a working machine and that filter hardening is switched on. The setting is possible within setting the time filter parameters.

Theft condition - fuel loss measurement period (in seconds). The setting is possible within the setting of theft conditions.

Theft condition - the time of the length of switching on the status output when theft is detected (in seconds). The setting is possible within the setting of theft conditions.

Accelerometer - the tilt of the X-axis. Linear conversion A=0.006, B=-180 is required, the result is an angle from the interval <-90°… 90°>.

Accelerometer - acceleration of the X-axis. Linear conversion A=0.002, B=-8 is required, the result is acceleration in g from the interval <-8 … 8>.

Accelerometer - Y-axis calibration offset (deviation from the horizontal plane at the time of calibration). Linear conversion A=0.006, B=-180 is required, the result is an angle from the interval <-90°… 90°>.

Accelerometer - Z-axis calibration offset (deviation from the horizontal plane at the time of calibration). Linear conversion A=0.006, B=-180 is required, the result is an angle from the interval <-90°… 90°>.

Fuel quality - bioindex. Linear conversion A=0.03125, B=0 is required, the result is a bioindex in % of the interval <0 … 100>.

Fuel quality - viscosity. Linear conversion A=0.0003052, B=0 is required, the result is viscosity in mm²/s from the interval <0 … 20.00>.

Fuel quality - density. Linear conversion A=0.0003052, B=0 is required, the result is density in kg/dm³ from the interval <0 … 20.00>.

Fuel quality - relative permittivity. Linear conversion A=0.00012207031, B=0 is required, the result is relative permittivity from the interval <0 … 5.000>.

Fuel quality - volume at 15 ° C. Linear conversion A=0.001, B=0 is required, the result is the volume in liters adjusted to a temperature of 15 °C from the interval <0 … 10000.0>.