Problem loading WifiScan example sketch to ESP8266-01S module

Projects Networking, Protocols, and Devices
1

I tried to load the Arduino example sketch, "WifiScan" to a ESP8266-01S module and got the following error messages:

Sketch uses 226641 bytes (52%) of program storage space. Maximum is 434160 bytes.
Global variables use 31840 bytes (38%) of dynamic memory, leaving 50080 bytes for local variables. Maximum is 81920 bytes.
/Users/johnair/Library/Arduino15/packages/esp8266/tools/esptool/0.4.9/esptool -vv -cd ck -cb 115200 -cp /dev/cu.usbserial-A50285BI -ca 0x00000 -cf /var/folders/gg/0vhm2f6d1_l5fk1vlt9zc_w80000gp/T/arduino_build_787973/WiFiScan.ino.bin
esptool v0.4.9 - (c) 2014 Ch. Klippel ck@atelier-klippel.de
setting board to ck
setting baudrate from 115200 to 115200
setting port from /dev/tty.usbserial to /dev/cu.usbserial-A50285BI
setting address from 0x00000000 to 0x00000000
espcomm_upload_filen GPIO 2
espcomm_upload_mem
opening port /dev/cu.usbserial-A50285BI at 115200
error: cannot access /dev/cu.usbserial-A50285BI

error: cannot access /dev/cu.usbserial-A50285BI

error: espcomm_open failed
error: espcomm_upload_mem failed

Wiring schematic attached does not indicate a 10K ohm resistor between GPIO 2 and Vcc.

WiFi Schematic.pdf (63.1 KB)

2

I think we can close this one out. I think the problem was that I was not connected thru the proper serial port.