Unable to control DC ports - Printable Version +- Robo-Tank DIY Aquarium Controller Forum (https://www.robo-tank.ca/forum) +-- Forum: Robo-Tank (https://www.robo-tank.ca/forum/forum-1.html) +--- Forum: Reef-pi Software Questions (https://www.robo-tank.ca/forum/forum-5.html) +--- Thread: Unable to control DC ports (/thread-1240.html) |
Unable to control DC ports - igorvin - 09-11-2021 Hello, I just receive Robo-Tank board and facing an issue to control DC ports I have a Raspberry PI 2 board with Raspbian installed following the Software Installation Manual document I successfully connect the temperature sensor and PH probe and can see data. But when I trying to control DC ports I get nothing When I checking voltage I didn't get 12 volts on the port I tried to take pin +12v from the DC port and GND from the Grounds connector - I can see 12v It looks like the ports connected to pca9685 not responding When I checking the I2C bus everything looks OK: Code: pi@raspberrypi:~ $ sudo i2cdetect -y 1 This is my configuration in Reef-Pi software: PCA9685 Driver: configured on Address:64 Frequency: 800 DC Port 4: configured as Outlets on Pin 12 In Reef-Pi I configured a new Equipment and connected it on Port: DC Port 4 On/OF is not responding I will be appreciated for your help to understand what I doing wrong Thanks in Advance RE: Unable to control DC ports - Rob F - 09-11-2021 Hi Igorvin, sorry you are having trouble, it's looking like the PCA9685 might be defective but it seems odd it has the correct I2C address. Because the pH is working we know the I2C is sending and receiving data and all the DC ports are independent components so it's not likely them. The +12v pins on DC ports are always live, the Ground pin is switched. I circled a few pads on the board, the red is DC 4, pin 12, see if you have any voltage there, that point is coming out of the PCA9685. I circled some ground pins in black that you can use. The blue circles are DC 5, 6 and 7, pins 11, 10 and 9, check those as well. It's very unlikely, but you could try going to the "admin" tab in reef-pi and press the "reload" button. Maybe check a few LED ports as well as those are controlled via the PCA9685 as well. RE: Unable to control DC ports - igorvin - 09-11-2021 Hi Rob, Thank you for your prompt response
RE: Unable to control DC ports - Rob F - 09-11-2021 Thanks for trying that, unfortunately it appears something is up with the PCA9685 chip, it's almost like it's in a sleep mode, those points you checked should have read 0-5v when turn on. I'll send you a replacement board, I'm very sorry for the troubles. I was able to match your forum email so I have your info. RE: Unable to control DC ports - igorvin - 09-11-2021 Thank you very much Rob |