Hi, just bought this Esp8266 wifi module and wired it up to my Arduino Uno as follows:
GND-GND
Rx-Tx
Tx-Rx
Vcc-3.3v (external power supply)
But when it comes to ch_pd, when i wire it to 3.3v (external ps), the esp8266's light goes off.. Help!
Ps. I noticed the power supply's output goes down from 3.3 to 1v whenever i wire up ch_pd
Ps. I noticed the power supply's output goes down from 3.3 to 1v whenever i wire up ch_pd
Sounds like either the power supply is inadequate or you have a wiring short or other wiring error. Also note that you may need to revuce the voltage on the arduino tx connection to the ESP8266 rx to prevent possible damage or other issues.
Thanks for the reply will try another power supply, and yes i made a voltage divider to rx and tx pins to output 3.3v.. Its just strange, the module is really new.. I double checked all my connections, theyre all correct
Got exactly the same problem.
I've already tried with another ESP8266 module but didn't work.
I am trying the same module and I found one very nice tutorial(Spanish) aduino-esp8266
There you can read
*"*Según la versión de firmware que incluya el modulo, el pin RST debe o no ser conectado a tensión (3,3V) para poder activar el uso del módulo. El que yo he recibido, desde luego no se activa sin él, pero he leído que hay versiones más antiguas que no lo necesitan."
"Depending on the firmware version included in the module, pin RST should or should not be connected to 3.3, in order to use the module. The one I got, at least, doesn't work without it, but I read there are older versions they don't need it."
All the modules I tried(3 until now...) need the connection, but who knows.
I've found this example where a nano and an esp8266 are used together.
http://blog.huntgang.com/2015/01/20/arduino-esp8266-tutorial-web-server-monitor-example/
According to this example, it appears that the arduino nano is not capable to supply a sufficient current to the esp module:
my particular Arduino was notnot capable of providing sufficient current to power the WiFi module. As a result I used a LD33V voltage regulator.