ESP8266 Community Forum

- Mon Aug 17, 2015 3:00 am #26244 Hi, got an ESP with your little "hello" sketch flashed, (update now in mail).
The only thing we haven't looked at is the ESP to breadboard adapter. If there was a short on it, my guess based on whats happening, it would be one pair of the middle four pins top to bottom. This could explain why it workked then didn't if the adapter had been turned through 180 deg.

@martinayotte
Hi, I agree whole heartedly that leaving pins floating introduces the risk of uncontrolled variables into designs. We are using pull ups on both GPIO 0 & 2 (have tried both 10K & 1K). I believe all the schematics posted on this thread & any I have posted on this site have pullup resistors.

- Tue Aug 18, 2015 10:27 am #26374

The only thing we haven't looked at is the ESP to breadboard adapter.

Thanks @BarnabyBear, I will check the adapter. However, I'm pretty sure I had not moved or rotated it between the time my sketches ran OK and the point where they stopped running. Also I have used it previously with NRF24 radio modules without issue.

The adapter is made from a tiny piece of tri-pad board, and I made use of the natural breaks in the tracks. However, it will be worth double-checking for solder bridges.

- Wed Aug 19, 2015 1:14 pm #26498 All
I have read that the ESP flash memory chip could have limited rewriting cycles
http://internetofhomethings.com/homethings/?tag=how-to-unbrick-esp8266
http://internetofhomethings.com/homethings/?p=396
http://www.eevblog.com/forum/projects/reflashing-esp8266-from-scratch/

Gio

- Wed Aug 19, 2015 1:28 pm #26499 @BarnabyBear, your ESP-01 is running absolutely fine, as soon as I powered it up (exact same circuit as I pulled mine out of to send to you).

Screenshot .jpg

Do you suggest I perform any other tests before I attempt to flash your ESP on my system?

@roboticboyer, the symptoms I'm seeing do sound similar to that first link (but not the second link). My soldering skills are not up to replacing surface mount chips that size. Also I value my sanity more than the cost of a replacement ESP-01 ! It will be interesting to see what BarnabyBear is able to do with my ESP-01.

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