ESP8266 Community Forum

- Sat Jul 04, 2015 4:21 am #22414 It's working with 2 x AA batteries!! (Not so surprisingly, like almost all of you said it was a supply problem...)

After the "ready" line, I am getting a LOT of "exceptions" for every AT command I try (including just "AT"), well that's another problem now.

@Stoney, currently, I do not have another supply with the barrel type connector. All the ones I have are USB out. Based on the schematic of the supply board you shared, it seems like I can try to feed it via it's USB connector - but I don't even have USB-to-USB male connector (from wall adapter to bread board supply).

You are better off using a switch mode supply for the plug pack than one with a transformer. the transformer ones are generally unregulated and also less current.

How do I differentiate between the two (when buying them)?

I'll try a get a new wall adapter with at least 1A rating or a 2 AA battery holder

Thanks!!

- Sat Jul 04, 2015 8:45 am #22421 I don't see any place in this thread talking about GPIO0 and GPIO2. How did you wired them ?
They should be pulled-up to VCC for normal boot.

- Sat Jul 04, 2015 6:57 pm #22457 In case it helps, here are the diagrams of the circuits I have been using successfully.

http://neilkolban.com/tech/wiring-up-esp8266s/

Free ESP8266 book available for download here.

- Mon Jul 06, 2015 1:39 pm #22610

It's working with 2 x AA batteries!! (Not so surprisingly, like almost all of you said it was a supply problem...)

After the "ready" line, I am getting a LOT of "exceptions" for every AT command I try (including just "AT"), well that's another problem now.

@Stoney, currently, I do not have another supply with the barrel type connector. All the ones I have are USB out. Based on the schematic of the supply board you shared, it seems like I can try to feed it via it's USB connector - but I don't even have USB-to-USB male connector (from wall adapter to bread board supply).

You are better off using a switch mode supply for the plug pack than one with a transformer. the transformer ones are generally unregulated and also less current.

How do I differentiate between the two (when buying them)?

I'll try a get a new wall adapter with at least 1A rating or a 2 AA battery holder

Thanks!!

excellent news !
There really should be a massive sticky on this forum pointing out the power supply woes you can have.

switch mode/vs transformer .. weight mostly.
a transformer one will feel like a small brick in comparison to a switch mode which has far less ferrous metal involved.
also current .. 12v/ 500mA is a 6VA transformer .. they are easily stuck into a wall wart.
12/2A .. not so much, they will invariably be a switch mode and probably still weigh less than the 500mA version.

I know what you mean about the annoying polarity on the pcb, be more useful with a female USB like a printer has so it could be powered from a usb lead. I have considered changing the usb socket on mine..
my computer puts out 5.2v though, powering it via USB would feed that 5.2 to the output of a 5v regulator. They do not always like that. smoke can result. so it would be a permanent mod and I would remove the 5v reg entirely or at least cut the track to it.