ESP8266 NodeMCU v1.0: no response on USB-serial connection
Posted: Mon Sep 25, 2017 3:35 amNo response received on any AT command when ESP8266 NodeMCU v1.0 development board is hooked up to FTDI USB to serial board.
Connections:
1. 3V3 to 3V3 on serial board
2. GND to GDN on serial board
3. EN to 3.3V
4. TX to serial pcb RX
5. RX to serial pcb TX
I use AccessPort ( http://www.usconverters.com/index.php?m ... &chapter=0 ) for serial monitoring. The serial board works fine (loopback comms ok).
On the scope I can see serial output from the ESP8266 pin when a reset is performed with the reset button (74880baud), and I get following output on the serial monitor:
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
What is the issue here?
Connections:
1. 3V3 to 3V3 on serial board
2. GND to GDN on serial board
3. EN to 3.3V
4. TX to serial pcb RX
5. RX to serial pcb TX
I use AccessPort ( http://www.usconverters.com/index.php?m ... &chapter=0 ) for serial monitoring. The serial board works fine (loopback comms ok).
On the scope I can see serial output from the ESP8266 pin when a reset is performed with the reset button (74880baud), and I get following output on the serial monitor:
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
What is the issue here?