ESP8266 Community Forum

- Wed Jan 23, 2019 8:23 pm #80237 Hello everyone =).

I have had many successful projects with the esp8266 so far, and love it.
But now a bit baffled.

I was running a new code with success, reading a BME280 and sending data to InfluxDB(database) over wifi.
But suddenly I saw all the readings go to zero in the serial monitor, so I thought that maybe the connections on my breadboard were bad, nope.
Then I put in another BME280, nope, still the same.
Then suddenly it works again!... But 5min later stops again... and it worked again for 5min.
I also think it had a small period where it read the BME280, but nothing getting to the database.
And then it just stopped completely!.

Cannot upload to the board.
No serial monitor output.
No light on the board.
I can measure 3.3 and 5v on the boards power pins (slightly lower reading).
ESP download tool has no success either.

Other similar ESP8266 works on same cable, so that rules out a lot.

Is it worth doing more?, I read other posts but haven't come across anything like this yet.

- Thu Jan 24, 2019 7:37 am #80242 What are the Voltages applied to the GPIO's and Vcc?
They all may not exceed 3.6V or the ESP will die after a while.

How many current is drawn from the GPIO's?
If more than 12mA per GPIO then the ESP might eventually die.

Assumption is the mother of all f*ckups. At least: that's what I'm assuming.

- Thu Jan 24, 2019 9:04 am #80249

What are the Voltages applied to the GPIO's and Vcc?
They all may not exceed 3.6V or the ESP will die after a while.

How many current is drawn from the GPIO's?
If more than 12mA per GPIO then the ESP might eventually die.

Hi, ehm.. board seems to be mysteriously working again, after it had been laying 14 hours un-plugged on my desk. , odd.
Will see soon if it does the same trick again.

What do you mean by which voltages are applied to GPIO's and Vcc?. I power it by USB. Do you mean when just measuring on the board when plugged into USB power?.

The current draw on the GPIO i can try to measure. .