How to store data in flash
I am modifying the certain parameters at run time via Bluetooth which need to be stored permanently into Lopy module. Please provide method to store data in to flash.
Marco Moraes 0 last edited by Marco Moraes 0
@seb Is it possible to use this method with encrypted flash? I mean, is application capable of writing/modifying the json file if the flash is encrypted? And if so, does these changes count for those 3 FW flashs overs USB?
seb last edited by
You can access files on the device's flash just like you would any other file in python:
with open("/flash/my_config.json", 'w') as conf_file: conf_file.write(json.dumps(my_config_dict))
with open("/flash/my_config.json", 'r') as conf_file: my_config_dict = json.loads(conf_file.read())
I use JSON file for this. In my application class instance the config is a dictionary. You can call json.dumps() on it and write the result into a file.
Later you can read the string from the file and call json.loads() on the result to "create" config dictionary.
Consider NVS if storing integers is all you need.