ESP8266 Community Forum

Hi,
Hi, I’m new to the ESP modules and I must say the ride has been frustrating to say the least. I wonder if someone can help. I have 5 of the ESP-01’s

For starters, I can run the ESP-01 via a USB-Serial adapter no problem but I can’t seem to get it to run on an Arduino Pro mini (3v3). I think the problem may be the USB-Serial adapter but I can’t be certain. I have tried connecting my module to pins 10 and 11 and my serial adapter to the TX/RX of the mini and the other way around also but still no luck.

I have a 5v power adapter connect to the mini raw pin and I go through a 5v to 3v3 converter to provide power to the ESP vcc and ch_pd pins and then I have GND to GND , TX to RX and TX to RX (I also tried RX to RX and TX to TX) but no luck. Either I get garbage out of my serial adapter or nothing.

The other question is, when I first plugged in one of the modules to my serial adapter I saw it was running 0.92. I decided to do a cloud upgrade, I saw the 4 or 5 Update x message and then I got a bit of garbage and that was it, I cannot get back to it. In fact the only way I can get anything out of the module, although it’s just garbage, is when I have the ch_pd pin unplugged. If I have it high I get nothing at all. I eventually put this one aside and connected another one. It was also at 0.92. This time I downloaded 0.95 from the electron dragon website and upgraded using esptool.py. When I was finished I hhad the same result as the one I upgraded over the cloud. What am I doing wrong?

Thank you,

Mike

What is your "5v to 3v3 converter" pro-mini or usb adapter can't provide the needed current (~350ma) that is needed by ESP.

AMS1117-3.3v works good, up to 1A! There's tons of posts on power requirements and power issues.

..maybe the cloud update worked, I wouldn't do it going forward, leave CHPD high. Unplug power from the module, try 115200 baud (or 9600 or 57600) and see if the garbage becomes readable.

these modules take a beating and are hard to brick.

I agree with iHaveESP ... garbage suggests its not bricked, it does suggest the baud rate has been changed...

Thank you both for your replies. I use a AMS1117 to power my ESP-01. I was able to get one going again, it was in fact running at 115200. The other though I've had no luck. When I power it up the blue LED repeatedly flashes and garbage scrolls over the terminal.

Regards,

Mike