WARNING: Failed to communicate with the flash chip, read/write operations will fail. Try checking the chip connections or removing any other hardware connected to IOs.

[twertybog]

Hello!
I purchased an evil crow rf v2 on aliexpress after arriving I tried to flash it with firmware but error appeared. In arduino ide error:

Sketch uses 940046 bytes (71%) of program storage space. Maximum is 1310720 bytes.
Global variables use 90720 bytes (27%) of dynamic memory, leaving 236960 bytes for local variables. Maximum is 327680 bytes.
esptool.py v3.0-dev
Serial port /dev/ttyUSB0
Connecting........_____....._____....._____....._
Chip is ESP32-PICO-D4 (revision 1)
Features: WiFi, BT, Dual Core, 240MHz, Embedded Flash, VRef calibration in efuse, Coding Scheme None
Crystal is 40MHz
MAC: d4:d4:da:97:8d:f8
Uploading stub...
Running stub...
Stub running...
Changing baud rate to 921600
Changed.
Configuring flash size...
Warning: Could not auto-detect Flash size (FlashID=0x0, SizeID=0x0), defaulting to 4MB
Compressed 8192 bytes to 47...
Writing at 0x0000e000... (100 %)
Wrote 8192 bytes (47 compressed) at 0x0000e000 in 0.0 seconds (effective 19910.0 kbit/s)...

After that, I tried to erase flash with esptool

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

esptool.py v4.7.0
Serial port /dev/ttyUSB0
Connecting....
Chip is ESP32-PICO-D4 (revision v1.0)
Features: WiFi, BT, Dual Core, 240MHz, Embedded Flash, VRef calibration in efuse, Coding Scheme None
Crystal is 40MHz
MAC: d4:d4:da:97:8d:f8
Uploading stub...
Running stub...
Stub running...
WARNING: Failed to communicate with the flash chip, read/write operations will fail. Try checking the chip connections or removing any other hardware connected to IOs.
Erasing flash (this may take a while)...

A fatal error occurred: Packet content transfer stopped (received 3016 bytes)

And got info about flash

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

esptool.py v4.7.0
Serial port /dev/ttyUSB0
Connecting....
Chip is ESP32-PICO-D4 (revision v1.0)
Features: WiFi, BT, Dual Core, 240MHz, Embedded Flash, VRef calibration in efuse, Coding Scheme None
Crystal is 40MHz
MAC: d4:d4:da:97:8d:f8
Uploading stub...
Running stub...
Stub running...
WARNING: Failed to communicate with the flash chip, read/write operations will fail. Try checking the chip connections or removing any other hardware connected to IOs.
Manufacturer: 00
Device: 0000
Detected flash size: Unknown
Hard resetting via RTS pin...

[joelsernamoreno]

Hello @twertybog

What is your OS? In debian it gives some problems, in Ubuntu it should work correctly

[twertybog]

Hello @twertybog

What is your OS? In debian it gives some problems, in Ubuntu it should work correctly

Thanks for response.
I use Arch. I will try Ubuntu for flashing.

[lrosario]

the same to me and i use macOS. can u help me?

[lrosario]

esptool.py --chip esp32 erase_flash
esptool.py v4.8.1
Found 5 serial ports
Serial port /dev/cu.wchusbserial1230
Connecting....
Chip is ESP32-PICO-D4 (revision v1.0)
Features: WiFi, BT, Dual Core, 240MHz, Embedded Flash, VRef calibration in efuse, Coding Scheme None
Crystal is 40MHz
MAC: d4:d4:da:aa:ab:3c
Uploading stub...
Running stub...
Stub running...
WARNING: Failed to communicate with the flash chip, read/write operations will fail. Try checking the chip connections or removing any other hardware connected to IOs.
Erasing flash (this may take a while)...

A fatal error occurred: Packet content transfer stopped (received 8 bytes)

[lrosario]

@joelsernamoreno can u help me?

[joelsernamoreno]

Hi @lrosario

I don't have macOS, I can't test this. Can you try it on Windows or Ubuntu?