ESP8266 Community Forum

- Fri Feb 01, 2019 12:21 pm #80368 See the updated schematic attached. I held down the GPIO0 button while momentarily grounding the reset button. Then I tried to upload a simple 22-line sketch that accesses the router. It didn't work. It repeatedly repeated the same error message 4 times:

esptool v0.4.13 - (c) 2014 Ch. Klippel <ck@atelier-klippel.de>
setting board to nodemcu
setting baudrate from 115200 to 115200
setting port from COM1 to COM3
setting address from 0x00000000 to 0x00000000
espcomm_upload_file
espcomm_upload_mem
setting serial port timeouts to 1000 ms
opening bootloader
resetting board
trying to connect
flush start
setting serial port timeouts to 1 ms
setting serial port timeouts to 1000 ms
flush complete
espcomm_send_command: sending command header
espcomm_send_command: sending command payload
espcomm_send_command: receiving 36 bytes of data
warning: espcomm_send_command: wrong direction/command: 0x00 0x08, expected 0x01 0x08
warning: espcomm_sync failed
error: espcomm_open failed
error: espcomm_upload_mem failed
error: espcomm_upload_mem failed

Attachments

Scan_0004.pdf

(214.4 KiB) Downloaded 177 times

- Fri Feb 01, 2019 12:26 pm #80369 I had trouble first time trying to download the schematic.

Attachments

Scan_0004.pdf

Schematic
(214.4 KiB) Downloaded 155 times

- Fri Feb 01, 2019 12:36 pm #80370

Scan_0004.pdf

Schematic
(214.4 KiB) Downloaded 157 times

Once more. This #*/! not very cooperative!!

Attachments

Scan_0004.pdf

Schematic
(214.4 KiB) Downloaded 175 times

- Fri Feb 01, 2019 1:57 pm #80372 You should have a 10K pull-up resistor to VCC on the REST (reset) line and a 10K pull-down resistor to GND on GPIO15 rather than the direct connection to GND.