B
Hi.
I'm relatively new to MODBUS.
I'm creating an interface for my HVAC system in my house.
I'm planning to control it from a raspberry pi, where i have all my sensor data. All scripts etc are good to go, but i need help wiring up the communication to the HVAC unit. (modbus RTU)
I have a usb to RS485 converter from my raspberry pi.
But the VCC out of the HVAC unit is 12V and the VCC out of the USB port is something else.
Could i just leave out the VCC since raspberry pi is self-powered?
Check out this:
https://drive.google.com/file/d/0B3Eq5NUU1ZDPUXhERl9TXzJjQWc/view?usp=sharing
I need help where the question mark is.
Thank you!
I'm relatively new to MODBUS.
I'm creating an interface for my HVAC system in my house.
I'm planning to control it from a raspberry pi, where i have all my sensor data. All scripts etc are good to go, but i need help wiring up the communication to the HVAC unit. (modbus RTU)
I have a usb to RS485 converter from my raspberry pi.
But the VCC out of the HVAC unit is 12V and the VCC out of the USB port is something else.
Could i just leave out the VCC since raspberry pi is self-powered?
Check out this:
https://drive.google.com/file/d/0B3Eq5NUU1ZDPUXhERl9TXzJjQWc/view?usp=sharing
I need help where the question mark is.
Thank you!