- Sat Oct 17, 2015 5:00 pm
#31613
My ESP-01 has always had it's blue led ON; I have been uploading and running Arduino sketches on it for some time, so I always assumed that blue LED was the power on LED...
- Sat Oct 17, 2015 6:34 pm
#31614
do you have a level converter on the TX line comming from Arduino if not you may have blown the Rx on the ESP
I did read yesterday [ don't remember where] that the ESP inputs had 6 volt protection....not sure if infor was reliable.
Are you sure Arduino is functioning ok , can you loop RX to TX to test?
I did read yesterday [ don't remember where] that the ESP inputs had 6 volt protection....not sure if infor was reliable.
Are you sure Arduino is functioning ok , can you loop RX to TX to test?
- Sun Oct 18, 2015 10:02 pm
#31695
I am with Barnabybear on this one...you have the factory test script and you need to get those ESPs into programming mode to put something useful on them 
Barnabybear wrote:Hi,
Vcc -> 3.3V
CH_PD ->3.3V
RST -> 3.3V
GPIO 0 -> 3.3V via a resistor (anything between 1K & 10K)
GPIO 2 -> 3.3V via a resistor (anything between 1K & 10K)
GND -> GND
Tx -> Tx (with arduino as Tx is realy Rx)
Rx -> Rx (with arduino as Rx is realy Tx)
Set serial terminal to CR & NL, baud will be 9600 or 115,200 dependant on firmware.
This will get you into normal run mode. To flash, leave the GPIO 0 resistor in place but connect GPIO 0 to ground, power off then back on, flash then remove the GPIO 0 connection to ground.
- Tue Jan 09, 2018 7:37 pm
#73026
Did you ever resove your constant Blue LED issue?
