seraph333

Hi, Fausto, I did the command, both with and without jumper, with found the eeprom at address 1, without found the eeprom at address 0.

Hi, Fausto, Thanks for your response. I don't have other third-party HAT, but this MCC152 on the RPI 2. I don't have any history about this RPI 2, other than it is new, but left in the lab for quite a long time. My RPI 4 is used on other project, this MCC 152 HAT is pulled out from that project. Since it can be recognized at address 1, can address 0 been left out without any board?

Hi, I have a Raspberry pi 2, and a MCC 152. The RPI is showing a board at address 0, but not able to list the device, the MCC 152 is not found. The MCC 152 was function at my Raspberry Pi 4. When I place the jumper at A0, the MCC 152 now is found at address 1, but isn't the manual says "There must always be a board at address 0" So why the single board MCC152 cannot be found at address 0?

First: except (HatError, ValueError) as error: ^ SyntaxError: invalid syntax

Thanks, Jeffrey, I appreciate for the material you provided. It's just at this stage I don't have that much time to start from beginning. I am strong on mechanical design side but not software. I am trying to use all the AO to control a LED array. Tried to modify the codes, but error just popup here and there, following is the code I am struck with, any little help to me is big. def main(): options = OptionFlags.DEFAULT channels = (0,1) hat0 = mcc152(0) hat1 = mcc152(1) hat2 = mcc152(2) for channel in channels: hat0.a_out_write_all(channel, get_input_values) hat1.a_out_write_all(channel, get_input_values) hat2.a_out_write_all(channel, get_input_values) address = select_hat_device(HatIDs.MCC_152) run_loop = True error = False while run_loop and not error: try: values = get_input_values() except ValueError: run_loop = False else: # Write the values. for hat in range(3): print(' ', hat, end='') if hat == 0: for channel in channels: hat.a_out_write_all(values=values, options=options) elif hat == 1: for channel in channels: hat.a_out_write_all(values=values, options=options) else: for channel in channels: hat.a_out_write_all(values=values, options=options) except (HatError, ValueError): error = True if __name__ == '__main__': # This will only be run when the module is called directly. main()

Thanks, Jeffrey. Please excuse me as a newbie for python and Raspberry pi. I try to write all analog out for 3 MCC 152 HAT, but there always problems to execute. Can you please help? I have the file I modified attached. Thanks a lot. analog_output_write_allx3.py

Thanks, Jeffrey. I should rephrase as how can I define the raspberry pi to give the MCC 152 a digital signal to output voltage. I also has three MCC 134 HATs to take 6 thermocouples temperature, ADC to raspberry pi, compare with the input temperature, then use MCC 152 DAC to control power supply. What is the code on raspberry pi to read the 6 thermocouples temperature? What is the code to give MCC 152 the signal. Thanks a lot.

I have two MCC 134 HATs on raspberry pi 4 for 6 thermocouple input, and three MCC 152 HATs for 6 AO to control the power supply. What is the code to write on raspberry pi for the MCC 152 HATs voltage input and output?

Thanks, Jeffrey. Another question is for the delay_between_reads = 1. Is that possible to set it to less than 1 second? Such as 0.1 second? Or even without delay. Because the thermocouple input is going to compare with the set point then do PID control, to control a heater, the whole heating process supposed to less than 30 seconds. If every time it take 8 seconds to get the input, not sure the correction will be made within 3 loops.

Hi, I connect two MCC 134 HAT on Raspberry Pi, I need 8 thermocouples input at the same time. What is the python code to address both Channel/HAT and input eight temperature? Thanks,