main.py

import settings

streams.serial()
print("Serial stream initialized")

print("Loading config...")
 

         
def flash_test():
    s = settings.load()
    print(s)
   
         
    
flash_test()

output.text

Serial stream initialized
Loading config...
loading json...
reading flash file

settings.py

import json
import flash
import streams

def write(s):
    print("writing flash file")
    ff = flash.FlashFileStream(0x00310000,512)
    ff.seek(0,streams.SEEK_SET)

    # save length and json to flash
    ff.write(len(s))
    ff.write(s)
    ff.flush()
    ff.seek(0,streams.SEEK_SET)

def read():
    ff = flash.FlashFileStream(0x00310000,512)
    print("reading flash file")

    n = ff.read_int()
    print("length: " + str(int))
    ss = ""
    for i in range(n+4):
        s = ff[i]
        ss += chr(s)
    return ss

def load():
    print("loading json...")
    r = read()
    print("read " + r)
    x = json.loads(r)
    print("loaded " + x)
    return x


def store(j):
    print("dumping json...")
    js = json.dumps(j) 
    print("writting string " + js)
    write(js)