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Reply To: RS485/Modbus RTU Transducers

Home Forums Environmental Sensors RS485/Modbus RTU Transducers Reply To: RS485/Modbus RTU Transducers

#1845
neilh
Participant

I received my dual relay board,
* AtomicMarket.com: 5V Two 2 Channel Relay Module With optocoupler
* SunFounder: 2 Channel DC 5V Relay Module with Optocoupler Low Level Trigger Expansion Board
and the code to drive the relays is pretty simple and is here:
https://bitbucket.org/neilh20/anuttx/commits/daf3e4199ec66c158a3ef20e0da64ec0bcb9f7db

The purpose is to be able to switch +12V to a Nanolevel capacitance depth gauge and read it over RS485. I’ve been running some tests with the Nanolevel querying it over RS485, and the results have been pretty stable as temperature has varied. However in the solar powered, minimal power useage, the Nanolevel needs to be off most of the time, power switched to it when its going to be used, a pause to allow it to stabilize, and then read it over RS485.