1. intro

32104 = SOC
32200 = AC voltage

2. elgris

modpoll -0 -a 1 -r 32104 -1 10.1.25.183 | grep ']'
[32104]: 12

3. modbus gateway

modpoll -0 -a 1 -r 32104 -1 10.1.2.59 | grep ']'
[32104]: 12

4. ttyUSB0

modpoll -0 -a 1 -m rtu -b 115200 -p none -r 32104 -1 /dev/ttyUSB0 | grep ']'
[32104]: 12
Tip change modbus default address to 2 
modpoll -0 -m rtu -b 115200 -p none -r 41100 /dev/ttyUSB0 2