MicroPython Forum (Archive)

@Roberthh Not quite, I'm afraid. The const() statement works as follows. If you write MYCONST = const(5) def foo(): a = MYCONST the compiler will compile a = 5. In other words it will be faster and the code will be smaller because it won't perform a read from the MYCONST global. However the global w...

Is anyone using MQTT with SSL? I'd like to try it but am puzzled as to how to go about it. A beginners' guide would be great, perhaps posted in the unofficial MQTT FAQ http://forum.micropython.org/viewtopic.php?f=16&t=2239.

On a normal network, TCP packets are guaranteed to be delivered in the order that they're sent, and they will be retried until the receiver acknowledges reception... I'm still trying properly to understand the umqtt.simple library. The socket is instantiated with self.sock = socket.socket() Presuma...

Very nice, I like the breadboard friendly form factor.

False is indeed bad and indicates that the firmware image is invalid. Does your device have sufficient flash to accommodate it?

...Embedding the pre-compiled files directly into the image is not actually a solution (for me) as there is always some debugging... For programs of any size on the ESP there isn't much choice. Obviously PC's differ but here the turn-round time for building and deploying is 5 seconds over a minute:...

OK but some algorithms require floating point. One example is Madgwick sensor fusion used in robotics and drones. Also astronomical calculations such as predicting sun and moon rise and set. Other algorithms can be performed using integers but with limitations: fast fourier transforms being an examp...

Re erasing flash. I'm not a Windows user but this should work if you change the port to the correct Windows serial port: Then install the firmware normally. You'll need to set up any WiFi connection details again as erase_flash erases everything.

dhylands wrote:...I think adding a function that just returns a tuple of names would be useful, especially from a debugging context.

Great idea!

Interesting and unexpected (by me). Yet os.listdir('') lists the contents of the SD card and always seems to yield the same result as os.listdir('/sd').