Random number generator
I had this idea of creating a finite state machine which makes transitions between three states. So, I needed to generate random numbers between 0 and 1. Is there such module for LoPy. I used randint(0,1) but it doesn't work. Any suggestions?
@livius Thanks I tried it and it works. I had another question if you could give some suggestion. I have been trying to take the last four bytes of the mac address as source and destination address to send data from one Lopy to a second LoPy. I created a package header as the following:
_LORA_PKG_FORMAT = "LL%ds"
_LORA_ACK_FORMAT = "LLB"
SRC_MAC_ADDR = ubinascii.hexlify(lora.mac().strip()[-4:])
DEST_MAC_ADDR = b'9cc15603'
** pkg = struct.pack(_LORA_PKG_FORMAT, DEST_MAC_ADDR, SRC_MAC_ADDR, msg)
But when I try running it complains saying ValueError: unsupported format for the line with **. what do you think I am doing wrong?
i see that code work on my Wipy2 without any modification :)
Random() 0.8462145 >>> Random() 0.4143322 >>> Random() 0.1052132 >>> Random() 0.7745724 >>> Random() 0.4098172 >>> Random() 0.2059813 >>> Random() 0.3866896
and bigger test:
sum=0 >>> ile=0 >>> for i in range(1,1000000): ... sum+=Random() ... ile+=1 ... >>> sum 499948.5 >>> ile 999999 >>> sum/ile 0.499949
realy near to 0.5 - as you can see it is ok :)
you can try something like this
please be patient that i write this from memory without any test - you should fix errors
this is only concept
def Random(): r = crypto.getrandbits(32) return ((r<<24)+(r<<16)+(r<<8)+r)/4294967295.0