Arduino TX LED always ON, can't set baudrate, AT not working
Posted: Sat Jan 09, 2021 4:20 pmHello!
I am new to the ESP8266 ESP-01S WiFi module.
Hardware:
One of the tutorials: https://www.instructables.com/Getting-S ... 66-ESP-01/
Connections:
Esp8266 | Arduino
-----------------
RX | RX (tested with and without voltage divider (1K ohm, 2K ohm))
TX | TX
GND | GND
VCC | 3.3v
CH_PD | 3.3v (tested with 10K ohm pull up resistor and without)
GPIO 0 | None
GPIO 2 | None
RST | None
Problem:
I have a couple of problems that might be connected.
1. When I connect the Arduino with my laptop the blue led on the ESP-01S blinks couple of times (let's say 5-10x in 2 seconds) and then turns off.
2. After the blue LED on the ESP-01S turns off, the green TX LED on the Arduino turns on and stays on. (Steps 1. and 2. repeat if I disconnect and reconnect the Arduino with the laptop)
3. If I open the Serial monitor in the Arduino IDE (when everything is connected) it throws an error saying "Cannot set the baud rate to [some value]". I have tried setting multiple baud rates but nothing works.
Do you have any ideas why this is not working?
I am new to the ESP8266 ESP-01S WiFi module.
Hardware:
- - Arduino Nano
- ESP8266 ESP-01S WiFi module
One of the tutorials: https://www.instructables.com/Getting-S ... 66-ESP-01/
Connections:
Esp8266 | Arduino
-----------------
RX | RX (tested with and without voltage divider (1K ohm, 2K ohm))
TX | TX
GND | GND
VCC | 3.3v
CH_PD | 3.3v (tested with 10K ohm pull up resistor and without)
GPIO 0 | None
GPIO 2 | None
RST | None
Problem:
I have a couple of problems that might be connected.
1. When I connect the Arduino with my laptop the blue led on the ESP-01S blinks couple of times (let's say 5-10x in 2 seconds) and then turns off.
2. After the blue LED on the ESP-01S turns off, the green TX LED on the Arduino turns on and stays on. (Steps 1. and 2. repeat if I disconnect and reconnect the Arduino with the laptop)
3. If I open the Serial monitor in the Arduino IDE (when everything is connected) it throws an error saying "Cannot set the baud rate to [some value]". I have tried setting multiple baud rates but nothing works.
Do you have any ideas why this is not working?