ATE0--> Send Flag error: #0 #0 #0 #0 AT+BLEINIT=0-->AT+BLEINIT=0

HiFive1 Rev B
1

My test is just the hello_world from zephyr, and the CORRECT output from serial port should be:

Bench Clock Reset Complete

ATE0-->ATE0
OK
AT+BLEINIT=0-->OK
AT+CWMODE=0-->OK

***** Booting Zephyr OS build zephyr-v1.14.0-2842-g0440a815a91b *****
Hello World! hifive1_revb

However, I sometimes obtained the following output:

ATE0--> Send Flag error: #0 #0 #0 #0 AT+BLEINIT=0-->AT+BLEINIT=0
OK
AT+CWMODE=0-->AT+CWMODE=0
OK

***** Booting Zephyr OS build zephyr-v1.14.0-2842-g0440a815a91b *****
Bench Clock Reset Complete

What is Send Flag error? How to avoid this error?

Cheers
Pei

2

These messages are from the bootloader, sometimes it fails to initialize ESP32 module.

3

Hi, I opened this thread
http://forums.sifive.com/t/modifying-zephyr-bootflow-to-skip-esp32-at-commands/3368 to understand where this bootloader code resides. Could you give some pointers to it, either here or in the other thread?

Thanks in advance!
Anthony