ESP8266 NodeMCU v1.0: no response on USB-serial connection

Erik84750
Posts: 1
Joined: Mon Sep 25, 2017 4:45 pm

ESP8266 NodeMCU v1.0: no response on USB-serial connection

Postby Erik84750 » Mon Sep 25, 2017 5:06 pm

Using USB-serial board with FTDI connection and AccessPort ( http://www.usconverters.com/index.php?m ... &chapter=0 ) monitor no response on AT commands is achieved. The serial board is tested with loopback connection and performs ok.
Connections:
1. 3V3 connected to serial board 3.3V
2. GND connected to serial board GND
3. TX to serial board RX
4. RX to serial board TX
5. EN pin is 3.3V

Only when RST button is pressed is the following result received on the monitor (74880baud):

ets Jan 8 2013,rst
cause:2, boot mode:(3,6)

load 0x4010f000, len 1384, room 16
tail 8
chksum 0x2d
csum 0x2d
v4022eaa8
~ld


No response to AT commands.

What can be the issue?

User avatar
pratik
Posts: 460
Joined: Wed Jun 29, 2016 7:17 pm
Location: India
Contact:

Re: ESP8266 NodeMCU v1.0: no response on USB-serial connection

Postby pratik » Sat Sep 30, 2017 11:23 pm

You should probably update the firmware on ESP8266 module that you are using.
Also, please use a 3.3V USB-UART converter. 5V can damage the ESP8266!
Regards,
Pratik Panda
Website: http://www.PratikPanda.com

Custom firmware, Knowledge base and freelancing (ESP8266/ESP32):
http://www.iot-bits.com

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