1. intro

  • in this tutorial, we are going to configure 2 USR-DR302 devices

  • one of them will be the master, the other the slave

  • the master will be installed near to the power smart meter

  • the slave will be installed near to the inverter or battery controller

  • both devices will be isolated from the customer’s network and will be invisible for normal operations

./pic/master-dr302.jpg ./pic/slave-dr302.jpg

2. reset

  • press and hold the Reload button for at least 10 seconds, and release it

  • connect to the default ip address

./pic/logon.png

3. master

./pic/master01.png

./pic/master02.png

./pic/master03.png

./pic/master04.png

./pic/master05.png

./pic/master06.png

4. slave

./pic/slave01.png

./pic/slave02.png

./pic/slave03.png

./pic/slave04.png

./pic/slave05.png

5. test modbus

sudo /opt/rpower/bin/modpoll -m rtu -b 9600 -p none -a 11 -r 8193 -c 10 -1 /dev/ttyUSB0
 modpoll 3.10 - FieldTalk(tm) Modbus(R) Master Simulator
Copyright (c) 2002-2021 proconX Pty Ltd
Visit https://www.modbusdriver.com for Modbus libraries and tools.

Protocol configuration: Modbus RTU, FC3
Slave configuration...: address = 11, start reference = 8193, count = 10
Communication.........: /dev/ttyUSB0, 9600, 8, 1, none, t/o 1.00 s, poll rate 1000 ms
Data type.............: 16-bit register, output (holding) register table

-- Polling slave...
[8193]: 17255
[8194]: 6554
[8195]: 0
[8196]: 0
[8197]: 0
[8198]: 0
[8199]: 0
[8200]: 0
[8201]: 0
[8202]: 0

6. debugging

sudo arp-scan 10.0.0.0/24
///
10.0.0.100      9c:a5:25:d4:ae:6a       Shandong USR IOT Technology Limited
10.0.0.101      9c:a5:25:d4:ad:d5       Shandong USR IOT Technology Limited
///

7. wifi scan