MicroPython Forum (Archive)

@Peter: Correct, putty is the terminal I use to issue commands to the board. On-topic though, I solved the problem! It was hardware related, and had to do with parasitic capacitance. Fortunately not micropython related. Thank you for helping me shift my focus from the micropython board to my hardwar...

... Nothing to do with list comprehensions but the way you're creating a list by iteratively appending an item. If you KNOW the size upfront, create it with one statement. You are absolutely right my friend. I tested it, and your suggestion is far superior in terms of speed. Thanks for learning me ...

Dear reader, I currently get the following error message semi-regularly when using the I2C communication protocol: OSError: [Errno 5] EIO. Now I've looked up what it means and apparently it's an Input/Output error (I/O error). I found a thread of a few months ago where someone had a similar problem,...

Thanks for your suggestion Peter, but I decided to solve my sampling problem in a bit more dirty way. It's still effective to achieve synchronous sampling rate, so I'm going to post my code here in case anyone has the same problem somewhere in the future: import time # Define sampling time, amount ...

Got it. I chipped away at the problem and isolated the bug. There is a bug with file append on pyboard v 1.1 . Keeping the file open for a while and making multiple writes causes the (implicit) close file to hang. I've logged it on github. I am also working on a project where I write sensor data to...

Thanks for your suggestion Peter, but I decided to solve my sampling problem in a bit more dirty way. It's still effective to achieve synchronous sampling rate, so I'm going to post my code here in case anyone has the same problem somewhere in the future: import time # Define sampling time, amount o...

I found the problem:

Note: Memory can’t be allocated during a callback (an interrupt) and so exceptions raised within a callback don’t give much information

Dear reader, I am trying to make sense of the micropython timer.callback() function, but I can't say I understand it very well. My idea was to use the following code to call a function every 1 second: import pyb import time def tick(): print(time.ticks_ms()) # Create timer which calls the function '...

Dear reader, I am trying to create a micropython application which controls an electromechanical device. To achieve this I want to sample my sensor at a regular interval, every 100 milliseconds. Now my question: How can I force my pyboard to run the same piece of code every 100 milliseconds? Here is...

Thank you for your reply. I found a different (maybe easier) way to concatenate two bytes from two 'bytes'-objects into one 'bytes'-object: highbyte = i2c.mem_read(1, address, addr) lowbyte = i2c.mem_read(1, address, addr+1) twobytes = highbyte + lowbyte ... For many I2C devices you can read both by...