ESP8266 Community Forum

- Fri Jan 08, 2016 8:56 pm #38259 Hi,

I have a sketch that I can successfully load into an ESP-01. But I need a few more I/Os so I've tried to load the same to an ESP-03.

The IDE tells me that it has completed uploading but I get nothing. I've tried to upload the .bin with one of the other flashing tools, seemingly successfully, but nothing works. I can't even get a 'hello world' from the serial port on the -03.

Feeling perplexed.

Any hints from wiser headds please?

Cheers

- Sat Jan 09, 2016 11:37 am #38308 What is your wiring ?

The RES/CH_PD/GPIO2/GPIO0 need to pullup resistors to VCC and GPIO15 needs pulldown.

- Sat Jan 09, 2016 6:33 pm #38372 Hi,

Wiring

CH_PD Tied to VCC
GP15 Tied to Ground
GP02 Pull up to Vcc with 1k2
GP0 Pull Down to Gnd for Programming. Pull up to Vcc wiht 1k2 for Run

Reset is not normally available on ESP-03

All references I can find say this is needed to run

- Barry

- Sat Jan 09, 2016 8:48 pm #38380 Then, it should run !
I don't have other clues, maybe defective module ...