ESP8266 Community Forum

- Wed Dec 23, 2015 12:27 am #36997 I connected my ESP8266 12E chip with Arduino Mega 2560. TX(Ard)->RX(ESP) level shift 3.3 and RX->TX has been taken care. 3.3V is from dedicated Voltage regulator capable of giving upto 750mAmp.
I am using Serial and Serial1 (ESP and Arduino) port. Also I have taken care of other aspects.
CHP_PD/EN is set to high via 10K pullup. GPIO0 set to 3.3 via pullup. GPIO15 connected to Gnd via 10k Pull down. GPIO2 set to high as well based upon some post. I have tried all the relevant baud rate from 9600 thru 115200. I have used a simple sketch checking available and reading Serial1 in loop. I just keep getting Junk. I tried resetting the board by applying Reset Low and then left floating. The Junk msg stops but unable to get response for any AT commands. "AT" or AT+RST. Please help.

- Wed Dec 23, 2015 3:25 pm #37021 Check that you are using the baud rate on the Arduino that the firmware on the ESP is using. Also, are you terminating the AT commands? By that I mean are you sending a CR and LF following "AT"?

I recommend connecting a terminal emulator to the ESP (in place of the Arduino) and experiment with typing different commands, terminators, etc. until you understand what the ESP expects and how it replies.

Don Kinzer
ZBasic Microcontrollers
http://www.zbasic.net

- Thu Dec 24, 2015 7:19 am #37050 dkinzer,
Thanks for your response.

On the web it says 115200 for the ESP8266-12E. So I tried all the bauds within the two extremes. I do have the CR+LF set in the terminal monitor. All this is being done via the Arduino connected to ESP via the IDE 1.6.6. Before I could try to type any message I just keep getting series of junk messages from the ESP with the blue light on. If I try to reset with the reset button the message stops and then start again. I will try only connecting the ESP with the FTR232 cable. I will get one.

- Mon Dec 28, 2015 5:43 pm #37351 I used the USB to TTL cable and connected the ESP8266 - 12E module. The garbage data just continued. Same situation with other bauds. Installing firmware such as the 09.05 AT version or the Node MCU version also didn't help. Not sure if its bricked. I hope there is a way to recover the chip.
Also I got the ESP8266-01 version of the chip and was able to setup nodemcu lua 5.1.4.