ESP8266 Community Forum

Hi!

I uploaded various firmwares to an ESP-12S but none start or work:

IoT_Demo (nonos SDK)
just an infinite loop (nonos SDK) so the blue LED flashes every second when the WDT reboots
at (nonos SDK)
at_espconn (nonos SDK)
https://www.espressif.com/sites/default ... .new.5.bin to rule out compilation errors.

I'm using esptool (not esptool.py) on a raspberry pi for uploading:

esptool -cp /dev/ttyAMA0 -ca 0x00000 -cf boot_v1.7.bin -ca 0x01000 -cf user1.2048.new.5.bin -ca 0x3fc000 -cf esp_init_data_default_v08.bin -ca 0xfe000 -cf blank.bin -ca 0x3fe000 -cf blank.bin

I also tried blank.bin at 0x3fb000 as https://www.espressif.com/sites/default ... ide_en.pdf says so in table 4-4 (page 21, 16/32) for 4096/1024+1024 configuration.

I only get some garbage from the serial port at boot. No response to AT or anything else:

socat - /dev/ttyAMA0,crnl,echo=0,b115200

After accidently supplying reversed power for < 1s the factory firmware worked and I can upload new firmware.

Any ideas what I'm doing wrong?