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Sineos
Hello everyone, I have an issue with klipper. I am not using it for 3D printing. I have designed a custom hardware. It consists of large heater plate switched by a MOSFET and reading a TCN75AV0A I2C sensor. At each corner of this heater plate I have one more of those sensors heating up with 40 W cartridge heater a standard Mk8 Creality heater block. For control I use a MUX PCA9545A. The main idea was to switch between different sensors and heat each one at a time. A general mistake in the design of the board I placed only one MOSFET to switch all heaters. The MUX idea for the logic is dead but I can still test my device non the less. Now I have to heat them up at the same time this just takes longer but is not an issue for testing. I use a Raspberry pi 4 to run klipper and an arduino micro as controller. My device requires two of these plate boards. I switch between addresses of the two boards one uses the MUX address 112 and the other 113 by bringing up a certain pin on the controller. I use a custom driver for PCA9545A mux that in testing works fine. I have problems with switching between the two boards. If I connect one of the boards and give it the default address of the MUX 112 it works I can heat everything and I don't have any errors. The problem comes when I try to use the other 113 address. After restart I can see the temps of the sensors but just for a bit then klipper shutdowns and error message: CommandError: Unable to obtain 'i2c_read_response' response.
PCA9545A.txt mlm75 mux code original.txt klippy.log.txt
As far as I am with testing the hardware I see no hardware error and everything works fine as long as I use the default MUX address. Am I doing something wrong or is there something wrong with klipper?