ESP8266 Community Forum

- Wed May 27, 2015 2:48 pm #18652 I tried to download this firmware: http://bbs.espressif.com/viewtopic.php?f=5&t=481
using this tutorial: https://www.ukhas.net/wiki/esp8266_firmware_update
for OS X
I downloaded the first bin file successfully, then it bricked my device.
I'm using an ESP-1 and the firmware version before was 0018000902-AI03.

- Wed May 27, 2015 4:02 pm #18664 I looked at the site that you referenced and I see a few concerns:

Connect your ESP8266 module as follows:

Vcc = 3.3V (needs around 300-400mA peak)
Gnd = -ve ground
CH_PD = Chip enable so always +ve
RST = Leave floating or ground to reset
GPIO0 = Normally floating but this needs to be grounded when you start the update.
UTXD = Tx data connect to Txd on FTDI/Serial interface
URXD = Rx data connect to Rx of FTDI/Serial interface

• UTXD should connect to Rx of the FTDI
• URXD should connect to Tx of the FTDI
• He mentions connecting CH_PD to +ve but for clarity he should say connect to Vcc
• He says to leave RST floating but I would pull it high just to be safe

You don't mention where you are getting 3.3V but many USB-to-TTL adapters don't always supply enough current. Many work but many do not work, especially when flashing firmware.

I don't think you can technically brick your module since it has ROM so double check your connections and try again.

- Wed May 27, 2015 9:21 pm #18682 what exactly are you flashing to your device? The binary AT firmware distribution that comes with the SDK?

Some of my work

- Thu May 28, 2015 10:26 am #18738 So what should I be flashing to it?
What's the latest version?