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ESP8266 SMD version RST pin ?

6 years 8 months ago #491 by subsix
hello,

i have some smd version on esp8266 board, related this page, i didn't see any RST pin on mine,

iot-playground.com/2-uncategorised/13-es...e-arduino-connection

1) Can i change pin to, UTXD 12 and URXD 11
2) Where can i set pin 7 not 3 for RST ? (cause he is alreay use by a LCD)
i have already checked out the lib folder, without any success.

regards

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6 years 8 months ago #508 by EasyIoT

subsix wrote: hello,

i have some smd version on esp8266 board, related this page, i didn't see any RST pin on mine,

iot-playground.com/2-uncategorised/13-es...e-arduino-connection

1) Can i change pin to, UTXD 12 and URXD 11
2) Where can i set pin 7 not 3 for RST ? (cause he is alreay use by a LCD)
i have already checked out the lib folder, without any success.

regards


You can change pins when you init SoftwareSerial (if you are using software serial).
SoftwareSerial serialEsp(10, 11);

Reset pin is set in begin function of esp library. In bottom case is pin 3, but you can change to any digital pin.
esp.begin(incomingMessage, 3, &serialEsp, &Serial);

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6 years 8 months ago #517 by cdj
Replied by cdj on topic ESP8266 SMD version RST pin ?
Ouch, i've never connect the reset pin, is it necessary ?
Thanks
Dario

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6 years 8 months ago #524 by EasyIoT

cdj wrote: Ouch, i've never connect the reset pin, is it necessary ?
Thanks
Dario


yes. ESP is sometimes unstable and freezes. only HW reset helps.

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6 years 7 months ago - 6 years 7 months ago #567 by cdj
Replied by cdj on topic ESP8266 SMD version RST pin ?
If i connect esp8266 reset pin with my D0 RST of arduino nano (of course with two resistors) it fail to upload sketch and give me :

avrdude: stk500_getsync(): not in sync: resp=0x00
and if i don't disconnect "reset pin" resistors from rst of esp to gnd it does'nt communicate....

Why ?

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6 years 7 months ago #569 by EasyIoT

cdj wrote: If i connect esp8266 reset pin with my D0 RST of arduino nano (of course with two resistors) it fail to upload sketch and give me :

avrdude: stk500_getsync(): not in sync: resp=0x00
and if i don't disconnect "reset pin" resistors from rst of esp to gnd it does'nt communicate....

Why ?


In esp.begin function declare reset DO Arduino pin. In this case:
esp.begin(incomingMessage, 3, &serialEsp, &Serial);

Arduino pin 3 should be connected to reset pin on ESP (use voltage divider if 5V Arduino is used).

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