ESP8266 Community Forum

- Sun Jun 21, 2015 9:29 am #21102 Hello, I'm trying the example UDP NTP client and it works fine on my esp-01, however on my esp-03 I get these messages in the serial monitor:

ets Jan 8 2013,rst cause:4, boot mode:(3,7)

wdt reset
load 0x40100000, len 28780, room 16
tail 12
chksum 0x68
ho 0 tail 12 room 4
load 0x3ffe8000, len 1564, room 12
tail 0
chksum 0x37
load 0x3ffe8620, len 2620, room 8
tail 4
chksum 0x34
csum 0x34
rl



Any idea what is going on here?

- Mon Jun 22, 2015 4:23 am #21194 Its resetting . Check your wiring See the wiki above

Get you modules here:

https://www.banggood.com/custlink/KvGGhGF4wG

- Mon Jun 22, 2015 3:07 pm #21269 Thanks, yes there is some flakiness with my esp-03 board.

Some things I notice:

The RST line is extremely sensitive to noise.... I will try using a 1 kohm pullup with 100nF cap to ground.

The Arduino programmer seems to get the DTR and RTS signals right for pulling GPIO0 low and RST low to enter programming mode, however once programming is complete the DTR and RTS lines are still low and I have to manually pull those lines back up and reset the board to run my program.
I'm using a CP2102 USB to UART chip, how is the Arduino programmer controlling the DTR and RTS lines and can I change some code to get these lines to behave properly after programming is complete?

Thanks

- Mon Jun 22, 2015 4:07 pm #21276

I'm using a CP2102 USB to UART chip, how is the Arduino programmer controlling the DTR and RTS lines and can I change some code to get these lines to behave properly after programming is complete?

Not something I am familiar with sorry - maybe somebody else can help ?

Get you modules here:

https://www.banggood.com/custlink/KvGGhGF4wG