ESP-01/07/12 Series Modules User's Manual V1.4
Copyright © 2017 Shenzhen Ai-Thinker Technology Co., Ltd All Rights Reserved
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+IPD,10:Ai-Thinker
//received 10 data (Ai-Thinker)
AT+CIPCLOSE
//close the UDP connection
CLOSED
OK
6 FAQ
6.1 Garbage Instructions When Power Is On
ESP8266 chip itself supports 26MHz and 40MHz crystal, if the use of 40MHz
crystal, the default baud rate of 115200, if the use of 26MHz crystal, the UART0
power after the baud rate = 26 * 115200/40 = 74880, the letter can be ESP8266
Series modules are used 26MHz, because the general serial port tool does not support
the baud rate, so there will be printed on the garbled.
You can use the security serial interface assistant to configure the baud rate
74880 to view the startup information.
Note: part of the USB to TTL does not support 74880 baud rate, the computer
comes with RS232 to TTL does not support 74880 baud rate, recommend the use of
FT232, CP2102, CH340 and other chips.
6.2 How To Shield The Power When The Garbled
U0TXD default power will be system printing, through the UART's internal pin
switching function, user_init () call system_uart_swap () function, the new U0TXD
change to GPIO15, U0RXD change to GPIO13, the hardware connection on the two
cited Feet can be serial communication.
Note: After the exchange, the download pin on the hardware is still the original
U0TXD and U0RXD.
6.3 Can’t Burn Normally
Refer to
http://wiki.ai-thinker.com/esp_download
to download, pay attention to
download before the module to ensure that the download mode.