before I did this mistake my ESP8266 ESP01 modul worked fine. But the firmware was old so I decided to update that thing. I did this with the "ESP FLASH DOWNLOAD TOOL V2.3" at the baudrate of 9600 (default for old firmware). The latest firmware (ESP8266_NONOS_SDK_V1.5.1_16_01_08 ) I downloaded from the Espressif homepage. This bin files were flashed to the respective adresses:
esp_init_data_default.bin -> 0xFC000
blank.bin -> 0xFE000
boot_v1.5.bin -> 0x00000
user1.1024.new.2.bin -> 0x01000
after that the modul work also fine, but at a baudrate of 115200. This is to fast for the SoftwareSerial of an arduino. So I changed the baudrate with the command:
Now nothing works. I cannot communicate to the modul, neither with 19200 nor any other baudrate, the one I get are some strange symbols and then the blue LED stays on. It doesn't react on any commands. New flash is not possible because the Flash tool doesn't have a 19200 baudrate. With other flash tools the connection failes at 19200 and other baudrates.
What can I do to rescue my little modul? Is there a chance to change the baudrate back to 115200 or 9600? or do I miss something.
thanx for help!