1 lvcard 1,2 100 ev
2 lvcard 2,4 100 ev
3 lvcard 2,4 1000 ev rate 100
4 lvcard 2,4 1000 ev rate 0

run 2,3,4
./lvcard2 --version -M 0
LOOP 1 SLEEP 20
Command M00?
 5 
M01:
VERSION:20250728_2
ID:0000
VOLTAGE:0
M01OK
M02:
VERSION:20250728_2
ID:0000
VOLTAGE:0
M02OK

LVCARD 0 VERSION 0
Number of errors 0