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Have been running with a USB -> RS485 adapter on a Rpi for a while now without issues. This adapter supports ADDC or at least it works with that config.
Am now busy trying a RS485 Module ( TTL -> RS485 based on MAX481 chipset) directly connected to Rpi serial0 on GPIO 8 & 10, so no flow control. RTS is pulled high on the module itself and I can't get it to communicate.
Would I have to use file based flow control in this case?
The text was updated successfully, but these errors were encountered:
Since RS-485 protocol is half-duplex, any module implementing it should have RX/TX mode switching circuit, either ADDC or connected to some RPi GPIO pin. And yes, in the second case you can use mbusd file-based direction control. But make sure you have a logic level shifter between RPi and MAX481, since RPi uses 3.3V logic which is incompatible with 5V TTL.
This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.
Have been running with a USB -> RS485 adapter on a Rpi for a while now without issues. This adapter supports ADDC or at least it works with that config.
Am now busy trying a RS485 Module ( TTL -> RS485 based on MAX481 chipset) directly connected to Rpi serial0 on GPIO 8 & 10, so no flow control. RTS is pulled high on the module itself and I can't get it to communicate.
Would I have to use file based flow control in this case?
The text was updated successfully, but these errors were encountered: