ESP8266 Community Forum

- Sun Jun 14, 2015 12:04 am #20403 hi
i am using the esp8266-7 modules reliably for the past few months but now with the esp8266-12 modules and with the same connection stops responding after a minute. i even tried with gpio15 grounded but still the same problem persists. I tried the esp-12 setup with nodemcu code and it works perfectly.

these are the parts i am using

esp8266-wi07-7 http://www.electrodragon.com/product/es ... l-ios-smd/
esp8266-wi07-12 http://www.electrodragon.com/product/es ... l-ios-smd/
esp8266 adapter board http://www.electrodragon.com/product/es ... ter-board/

esp8266_bb.jpg

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- Sun Jun 14, 2015 1:54 am #20406 GPIO15 has to be grounded on ESP-12 and others whenever it is broken out . Various sites say that . That prevents the chip booting into SDIO mode.

Your problem sounds like its maybe doing a reset after a minute . Do you have a serial terminal attached and does your program write out any serial stuff? If so read the serial output . try 115200 baud and 74880 baud for starters . You have probably seen all the reset stuff already and know what to look for.

I had the same problem for a while as a reset can be triggered by the watchdog timer when the program hangs for any reason over a second . While(1) , While(::) statements cause it as does trying to read an out of bounds index and probably heaps of other causes.

Get you modules here:

https://www.banggood.com/custlink/KvGGhGF4wG