ESP8266 Community Forum

- Sun May 19, 2019 2:26 pm #82386 Hello.
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:

Code: Select allUploading 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?

- Wed May 22, 2019 2:09 am #82422 a) probably wrong levels on gpio0, gpio2, gpio15
b) obviously NO

- Wed May 22, 2019 4:22 pm #82433 Power voltage was too low (I was using li-ion, which doesn't work properly). With new power source everything works well.