Extremely cheap gateway for automation. Compatible with millions SCADA solutions (running on android, windows, cloud services etc.). Also useful for home automation: arduino projects, energy meters, temperature sensors, lighting solutions, solar panels, garage door openers etc. Solution based on TP-LINK router WR703N running openwrt and opensource project modbusgw (you can find it on sourceforge). It's actually Modbus/TCP to Modbus/RTU gateway with endless possibilities like VPN, WiFi, 3,4G wireless using external dongle etc. (thanks to openwrt team). To cut price RS-485 transceiver conected to internal serial port, data direction pin control with NE555 timer (ask google RS-485 NE555). As device for automation, i put somehow all stuff (with disassembled stock PSU) to small and cheap DIN box. Device tested with different energy meters (about 5 brands), arduino, temperature and humidity sensors and all works very well.
Components
1×
Router WR703N
1×
Timer NE555
1×
RS-485 transceiver SN75176
Connectors and Accessories / Telecom and Datacom (Modular) Connectors
I'm very interested in this project! This aligns well with a side project I have been working on in my "spare time". Any chance you would be willing to share the modbusgw package you put together?
hi Robchiz, your project is very interesting, I can buy from you device?
Many greetings Siegfried Schleinkofer, micro.green @ gmx.net thanks for your answer
Hello,
Any news about step by step instruction?
Thanks