how to drive esp8266-07
时间：04-04
整理：3721RD
点击：
i use blow circuit to test ESP8266 but not worked .
i tested with boudrate 9600 , 115200 , 128000 , 38400 , ... But no response was received .
Where is the problem?!
Also if you are using 5v UART adapter it is a good idea to use a 1K resistor between the PC TX -> ESP Rx connection to prevent 5v reaching the 3v inputs.
Also note that using the 3v line of your UART adapter will probably not work because it can't provide enough current. Either use an external psu or use a 3v regulator on the 5v USB supply
i tested with boudrate 9600 , 115200 , 128000 , 38400 , ... But no response was received .
Where is the problem?!
Your module has all IO exposed so GPIO0 and GPIO2 should be high and GPIO15 low for the board to boot normally.
There is already an internal pullup on GPIO0 so you only need to pull GPIO2 high and GPIO15 low (use a 1K or higher resistor for each one to avoid damaging them in case they become outputs).
The operation modes are listed in https://zoetrope.io/tech-blog/esp826...-state-startup
Also if you are using 5v UART adapter it is a good idea to use a 1K resistor between the PC TX -> ESP Rx connection to prevent 5v reaching the 3v inputs.
Also note that using the 3v line of your UART adapter will probably not work because it can't provide enough current. Either use an external psu or use a 3v regulator on the 5v USB supply