ESP8266 Community Forum

I've been playing around with one of these ESP Witty boards I got from eBay (https://plus.google.com/+AlanLord/posts/eZHi3dkZZho).

I've had it connected up to a DHT22 for a couple of days running some LUA code which reads the sensor, sends the information to an MQTT broker then goes to deep-sleep for 5 minutes. This has been working fine up until this morning when I noticed the LED was brightly on (normally indicating the chip is powered on) but nothing is set over the UART so it looks like it has just hung.

Anyone else noticed anything like this? I did find this thread on the Espressif forum which sounds similar but clearly there is a language issue or they didn't understand what the guy was asking... http://bbs.espressif.com/viewtopic.php?t=1161

I read somewhere else that it might require a 4.7k pull up on GPIO0 and GPIO2 as well so I have just added a couple of resistors to my breadboard test to see if that makes any difference.

Nope, the 4.7K resistors didn't help

Here is the output of the chip on boot up:

Did you attached GPIO16 to RST ?

martinayotte wrote:Did you attached GPIO16 to RST ?

Yes - as I said - it had been working for well over 24 hours, nearly 2 days... Sleeping and waking, and sleeping and waking... Then it "waked" but no data from the UART and the code didn't run so it just sat there... Not going back to sleep...