I bought esp8266 with serial wifi wifi card I connect RX to TX; TX to RX; VCC to VCC; GRD to GRD; I cant communicate with the board not if program mode and not in UART mode; the reset do nothing.

the red led on the board is on.

I connected the wifi serial to Arduino uno board. try to upload sketch i got the following error:

warning: espcomm_sync failed
error: espcomm_open failed
error: espcomm_upload_mem failed

Any help or guides will help me to solve the issue.

Source: esp8266 on wifi serial board and Arduino Uno board – Stack Overflow