Tensorflow Lite MicroPython support - I cannot use Pycom modules?

[robert-hh]

@Adnan-Sabovic-0 So you use a Linux System with a generic USB/UART FT232 adapter. I'm asking because only the /dev/ttyUSBx is the right port. Which devices do you see with

ls /dev/tty*

rshell is sometimes difficult to use. I prefer mpremote, which is faster and newer.

[Adnan Sabovic 0]

@robert-hh By typing ls /dev/tty* or dmesg | grep tty I can find my board:

/dev/ttyUSB0

And this is the output from mpremote (when I type mpremote in Ubuntu terminal):

rst:0x3 (SW_RESET),boot:0x13 (SPI_FAST_FLASH_BOOT)
configsip: 0, SPIWP:0xee
clk_drv:0x00,q_drv:0x00,d_drv:0x00,cs0_drv:0x00,hd_drv:0x00,wp_drv:0x00
mode:DIO, clock div:2
load:0x3fff0030,len:4604
ho 0 tail 12 room 4
load:0x40078000,len:13872
load:0x40080400,len:3356
entry 0x4008061c
E (56) flash_parts: partition 3 invalid - offset 0x300000 size 0xc65d40 exceeds flash chip size 0x400000
E (56) boot: Failed to verify partition table
E (62) boot: load partition table error!
ets Jun  8 2016 00:22:57

Any idea how to solve this?

[robert-hh]

@Adnan-Sabovic-0 Like I answered in the Micropython forum: A reliable approach is performing a flash full erase using:

esptool.py --port /dev/ttyUSB0 --chip esp32 erase_flash

And the reinstall the firmware. That should fix the flash layout.

[Adnan Sabovic 0]

@robert-hh I did what you wrote here but again same issue. I performed a flash full erase and then installed again firmware and uploaded it on my board but again same error.

[robert-hh]

@Adnan-Sabovic-0 That's strange. After a full erase everything should come up straight again.

[Adnan Sabovic 0]

@robert-hh I really don't know. I tried everything but this is really hard to enable to work. Based on their suggestion on this link (https://github.com/mocleiri/tensorflow-micropython-examples/blob/main/examples/person_detection/README.md) the microlite-spiram-16m-esp32-firmware should be used with esp32. After error I thought it's quite heavy for my board and then tried a lighter version but again not possible to run anything on the board. For the lighter version of firmware I got this:

Rebooting...
ets Jun  8 2016 00:22:57

rst:0xc (SW_CPU_RESET),boot:0x13 (SPI_FAST_FLASH_BOOT)
configsip: 0, SPIWP:0xee
clk_drv:0x00,q_drv:0x00,d_drv:0x00,cs0_drv:0x00,hd_drv:0x00,wp_drv:0x00
mode:DIO, clock div:2
load:0x3fff0030,len:4604
ho 0 tail 12 room 4
load:0x40078000,len:13872
load:0x40080400,len:3356
entry 0x4008061c
E (847) psram: PSRAM ID read error: 0xffffffff
E (847) spiram: SPI RAM enabled but initialization failed. Bailing out.
E (10) spiram: SPI RAM not initialized

[robert-hh]

@Adnan-Sabovic-0 If 16m in the firmware name indicates 16MByte flash, then the firmware is wrong. FiPy has 8MB flash. So you need the matching firmware version.

[Adnan Sabovic 0]

@robert-hh I am not using FiPy right now. I ordered esp32-WROOM-32 to test as you suggested me to use pure MicroPython code (based on esp32). Because of that, I tried with 16MB firmware. With FiPy it works with "lighter" firmware but I want to test camera which is based on what I observed easier to do with esp32 board.

[robert-hh]

@Adnan-Sabovic-0 The WROOM-32 module has 4 MB Flash and no SPIRAM. So you have to use the MICROLITE version.

[Adnan Sabovic 0]

@robert-hh I just checked that, but are there any products with 8/16 MB Flash and SPIRAM as well. I also saw that they use esp32 cam. Is there classic esp32 cam with additional MB module and integrated camera is enough to support the proposed firmware (MICROLITE SPIRAM CAM)?

[robert-hh]

@Adnan-Sabovic-0 The must be hundreds of different ESP32 modules available. You have to Search. The first which I found was a esp32-CAM module, with 4 MB flash and 4 MB SPIRAM + camera.

[Adnan Sabovic 0]

@robert-hh Yes, indeed. Sit and search :)

Thanks for help!

[robert-hh]

@Adnan-Sabovic-0 I have a few links here, don'rt know if it helps:
https://www.berrybase.de/dev.-boards/esp8266-esp32-d1-mini/boards/esp32-cam-development-board-inkl.-ov2640-kameramodul?sPartner=g_shopping&msclkid=ff9ff1f60f271b5e66f793976b4cf5eb
https://de.banggood.com/ESP32-CAM-WiFi-+-bluetooth-Camera-Module-Development-Board-ESP32-With-Camera-Module-OV2640-Geekcreit-for-Arduino-products-that-work-with-official-Arduino-boards-p-1394679.html?gmcCountry=DE&currency=EUR&cur_warehouse=CZ&createTmp=1&utm_source=bing_pa&utm_medium=cpc_eu&utm_content=dcr&utm_campaign=dcr-co-bpla-deg-all-pc-0903&ad_id=&msclkid=35036f519f6318bf8aa30d30fb087491

[Adnan Sabovic 0]

@robert-hh I decided to not use esp32 cam as it can only operate at voltage above 4V, which is not useful for my setup. I have a question related to ESP32-WROVER-IE(16MB) chip. On which expansion board I should attach it and flash? This chip offers 16MB Flash and 8MB SPIRAM, somehing that I need for my project, but still no available boards on which this chip is attached.