MicroPython Forum (Archive)

Hello pythoncoder, Your assertion was right: It's possible to achieve sub-degree precision sun position calculation, with 30bit floating point precision from micropython, using Josh O'Brien's algorithm. The algorithm have already been coded to python: https://stackoverflow.com/questions/8708048/posi...

Thanks for your advices and the references you pointed me. I have to take some time to ingest it, but I definitely adopt the concept: start simple, complexify if needed. I think precision needed depends alot of the aim of the heliostat: If it's just to point PV panels toward the sun, rough precision...

Thank's alot for your answer, it help me to define what I really need. My first goal is to implement the NOAA's sun position calculation, to build an heliostat. https://www.esrl.noaa.gov/gmd/grad/solcalc/calcdetails.html The mechanical part of the heliostat will reach a 1 degre precision, so the sof...

Hello, What do you think about porting "Simple Fixed-Point Module" to micropython ? https://sourceforge.net/projects/pyfixedpoint/ I think it make sense because: - certain port (like esp8862) doesn't have floating point unit - software floating point is less efficient than fixed point - float point ...

Hello, What about mixing dc motors + servos ? It seems not possible because each kind work at different frequency. servo: 50Hz, dc_motor: 1600Hz And it's a global property of the pca9685 class, so if I change it for servo, it will change for dc_motor and vise-versa... Could you confirm my guess plea...

Thanks for tour advice, I will look this way.

Thank a lot deshipu,

I understand,

I don't own a FeatherWing, but I think I can do it with a H bridge, type L298N

hello, I'm back playing with PCA9685 and your helpful library. I see that it's also possible to drive DC motor, it's something I would want to try, but I don't understand how I should wiring it ? What kind of motor should I be able to drive ? I would like to recycle some two wire DC motors, does it ...

Hi,

The doc talk about uos.statvfs: https://docs.micropython.org/en/latest/ ... y/uos.html

But it's not in my firmware, daily build from: http://www.kaltpost.de/~wendlers/microp ... latest.bin from today 01/06/2017

I have missed something ?

Best regards

Solved

I have just added: at the beginning of my script to give it some time to connect to network.

Thanks