search

hamishcunningham / fishy-wifi

Scripts, notes and the odd subaquatic gizmo for the ESP8266 and what-have-you.
GNU Affero General Public License v3.0
25 stars 13 forks source link

Regarding your "Wiring the Olimex board" paragraph in the documentation #1

Closed kfricke closed 9 years ago

kfricke commented 9 years ago

This is not really an issue, but might be changed to reflect facts of the mentioned board and not suggest useless wirings on a proto board?!

IMHO the following points are obsolete with the used Olimex board. I will comment why and reference their board schematics...

  • need gpio 15 low and cp_en high

  • GPIO15 is to be found on pad 19 of the MOD-WIFI-ESP8266-DEV, which by the schematic is already pulled to GND by the default solder bridge (called MTDO on the board). So no special wiring for this is needed.

  • CHIP_EN is also pulled up to 3.3V using a 12k resistor already. Noting this is nice, but also no wiring needed for this to be pulled high.

  • to flash hold gpio0 low -- sometimes I think it doesn't float high so might try using 4.7k resistor to connect it to high?

GPIO0 on pin 21 of the devboard is also pulled up by a solder bridge, but seems to be able to be pulled down to GND by simply connecting pad 21 to GND (as you did). Reading the schematic shows it is pulled high over an 2K resistor already.

  • to get normal mode after flashing perhaps most useful

Should be accomplished by letting pad 21 off from GND again. Maybe add it to your DIP switch row as well!?

hamishcunningham commented 9 years ago

"useless wirings" -- hmmm... I guess that has been lost in translation, as I'm certainly using these wirings :-)

how about going off and hijacking another thread somewhere unrelated to you problem like the one I originally responded too?

have a more realistic one,

h