Hi:
I just received the PCA9685 expander but am confused about I2C addresses. With nothing attached to my controller board shows addresses 40, 63 & 70 as present in i2cdetect. Addresses 40 & 70 also appear on my Pi4 which is standalone and not connected to anything; therefore I reckon they are built in to the Pi circuitry for some purpose.
Apparently address 63 belongs to the Reef-Tank controller's built in PCA9685 circuit, although the Reef-Tank manual says it should be configured as address 64. Perhaps that explains why I couldn't get the RS232 custom cable to work with the Power Bar.
When I connect the expander it shows up as address 50.
Could you confirm the correct I2C addresses for both the built in and expander PCA9685 circuits? How should the expander driver be configured?
Thanks for the help.
I just received the PCA9685 expander but am confused about I2C addresses. With nothing attached to my controller board shows addresses 40, 63 & 70 as present in i2cdetect. Addresses 40 & 70 also appear on my Pi4 which is standalone and not connected to anything; therefore I reckon they are built in to the Pi circuitry for some purpose.
Apparently address 63 belongs to the Reef-Tank controller's built in PCA9685 circuit, although the Reef-Tank manual says it should be configured as address 64. Perhaps that explains why I couldn't get the RS232 custom cable to work with the Power Bar.
When I connect the expander it shows up as address 50.
Could you confirm the correct I2C addresses for both the built in and expander PCA9685 circuits? How should the expander driver be configured?
Thanks for the help.
José
Please post questions in the forum (not via PM) so that everyone can benefit from and contribute to finding solutions. Thank you.
Please post questions in the forum (not via PM) so that everyone can benefit from and contribute to finding solutions. Thank you.
