Two partitions 'vfs' in Micropython

[Pawelinode]

I compiled a Micropytho 1.23 image for ESP32 with two 'vfs' partitions differing only in their flash address. I can read their parameters:

import esp32,

p1 = esp32.Partition.find(esp32.Partition.TYPE_DATA, label='vfs')[0]
print(p1)
p2 = esp32.Partition.find(esp32.Partition.TYPE_DATA, label='vfs')[1]
print(p2)

I can mount the first one:

import vfs, uos
vfs.umount('/')
uos.mount(p1,'/')

The same code for the second one throws an error: OSError: [Errno 19] ENODEV
Can you use two partitions in Micropython?

[shariltumin]

My partitions-4MiB.csv is below:

# Notes: the offset of the partition table itself is set in
# $IDF_PATH/components/partition_table/Kconfig.projbuild.
# You must have vfs so that it will be mounted at boot
# Name,      Type, SubType, Offset,  Size,    Flags
nvs,         data, nvs,     0x9000,  0x6000,
phy_init,    data, phy,     0xf000,  0x1000,
factory,     app,  factory, 0x10000, 0x1F0000,
vfs,         data, littlefs,0x200000, 0x100000,
vfs2,        data, littlefs,0x300000, 0x100000,

I have a partition named "vfs" which will make my life easier when working with MicroPython environment.

Now I ran this script only once after firmware update.

from esp32 import Partition
import vfs, os

print('Warning: run this script only once, after firmware upgrade')

bdev2 = Partition.find(Partition.TYPE_DATA, label="vfs2")[0]
vfs.VfsLfs2.mkfs(bdev2)
fs2 = vfs.VfsLfs2(bdev2)

vfs.mount(fs2, "/fs2")
print(os.listdir('/'))

os.statvfs('/fs2')

print('Done!')

I need this boot.py script to mount "/fs2" every time I reboot.

from esp32 import Partition
import vfs, os

bdev2 = Partition.find(Partition.TYPE_DATA, label="vfs2")[0]

vfs.mount(bdev2, "/fs2")
print(os.listdir('/fs2'))

The easiest way to do this is to use mpremote. Say you have a mount script called "mountfs2.py". Suppose you have "mpr" as an alias to "mpremote" and your board is connected to /dev/ttyUSB1.

$ mpr u1 cp mountfs2.py :boot.py

This will make the boot.py and this will mount "/fs2" on reboot.