<![CDATA[Saving and reusing variables?]]>Hi, i've seen the new block in the beta (EEPROM) and I was wondering how can I save the data of the variables so I can use it after rebooting the M5.
Example: the score of a game, save it so the next time you turn off and on the device the score is still there

]]>https://community.m5stack.com/topic/2249/saving-and-reusing-variablesRSS for NodeWed, 29 Apr 2026 12:21:42 GMTFri, 28 Aug 2020 11:51:06 GMT60<![CDATA[Reply to Saving and reusing variables? on Sat, 29 Aug 2020 21:14:40 GMT]]>@world101 thank you a lot!!!

]]>https://community.m5stack.com/post/9876https://community.m5stack.com/post/9876Sat, 29 Aug 2020 21:14:40 GMT<![CDATA[Reply to Saving and reusing variables? on Sat, 29 Aug 2020 16:48:12 GMT]]>@gaviota said in Saving and reusing variables?:

How many write operations are maximal at the EPROM possible?

I was wondering the same thing. This source and in more detail this source say the typical is 100,000 write/erase cycles.

I'm also wondering which address location uiFlow uses to store the key/value data to EEPROM. @m5stack or @lukasmaximus do you know?

]]>https://community.m5stack.com/post/9875https://community.m5stack.com/post/9875Sat, 29 Aug 2020 16:48:12 GMT<![CDATA[Reply to Saving and reusing variables? on Sat, 29 Aug 2020 15:52:09 GMT]]>How many write operations are maximal at the EPROM possible?

]]>https://community.m5stack.com/post/9874https://community.m5stack.com/post/9874Sat, 29 Aug 2020 15:52:09 GMT<![CDATA[Reply to Saving and reusing variables? on Sat, 29 Aug 2020 12:55:32 GMT]]>Hi @manuxd32,
For uiFlow, there is an example of saving data as a key/value pair in M5 Docs.

I also created a simple example like this...
0_1598705685410_Screen Shot 2020-08-29 at 8.52.51 AM.png

]]>https://community.m5stack.com/post/9873https://community.m5stack.com/post/9873Sat, 29 Aug 2020 12:55:32 GMT<![CDATA[Reply to Saving and reusing variables? on Fri, 28 Aug 2020 18:41:04 GMT]]>@vkichline thank youuuu

]]>https://community.m5stack.com/post/9869https://community.m5stack.com/post/9869Fri, 28 Aug 2020 18:41:04 GMT<![CDATA[Reply to Saving and reusing variables? on Fri, 28 Aug 2020 17:45:12 GMT]]>Are you talking about NVS (Non Volatile Storage?)
M5ez uses it for its preferences. Here is a file that reads and writes them in C: https://github.com/vkichline/M5ezSettingsStorage/blob/master/m5ez_prefs_storage.cpp

Basically, just include preferences.h, call prefs.begin with false for read/write, then use the accessors from preferences.h and finish with prefs.end().

]]>https://community.m5stack.com/post/9867https://community.m5stack.com/post/9867Fri, 28 Aug 2020 17:45:12 GMT