I flashed firmware to my esp8266 using esptool. It was wifi router/repeater. After I had soldered it to 18650 cell it didn't run the firmware. It sends boot mode on UART and then does nothing. When I try to upload new firmware, it says:
Uploading 1968 bytes from 0x00000.bin to flash at 0x00000000
warning: espcomm_send_command: didn't receive command response
warning: espcomm_send_command(FLASH_DOWNLOAD_BEGIN) failed
error: espcomm_upload_mem failed
What's wrong? Can I get it working?