ESP8266 Community Forum

- Thu Mar 05, 2015 3:59 pm #11401 Updated version in the first post!
This one should work like needed by the module.

Have fun!

Some wifi a day, keeps the doctor away!
ESP-07 + DIY breadboard adapter

- Fri Mar 06, 2015 5:41 am #11440 I just took a quick look at the sch2.png:

it looks like CH_PD and reset are sharing the same pullup, is that intentional? I've never seen that before, but maybe it works.

Edit: One potential problem could be if a user directly connects the external CH_PD to Vcc, because some guide on the internet says it should be high, and then starts a new forum post:
-"why does the breadboard adapter start to smoke and faintly glow when i press and hold reset?"

I recently got my hands on some txb0108 voltage-level translators. Quite nice level shifter that allows us to interface with 1.2V to 5.5V devices.
It has auto direction sensing, but does not support pull-up/pull.downs smaller than 50KOhm.
So maybe the pull-down on GPIO15 should be just that - 50Kohm, what do you think (is 50K too high?)

- Fri Mar 06, 2015 9:25 am #11453 EadFr: I believe the CH_PD pin is the chip enable pin. It should be high for the module to work.

Atleast, that is what i read. Am i wrong here?

The txb0108 is nice but for this project, overkill. They are also quite expensive at 4 dollar each (ebay)

Some wifi a day, keeps the doctor away!
ESP-07 + DIY breadboard adapter

- Fri Mar 06, 2015 9:57 am #11454 Sorry for my ignorance - i am trying to understand schematics - what is JC1 element?