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General topics about hardware.
ESP8266 SMD version RST pin ?
9 years 9 months ago #491
by subsix
ESP8266 SMD version RST pin ? was created 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
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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9 years 9 months ago #508
by EasyIoT
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);
Replied by EasyIoT on topic ESP8266 SMD version RST pin ?
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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9 years 9 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
Thanks
Dario
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9 years 9 months ago #524
by EasyIoT
yes. ESP is sometimes unstable and freezes. only HW reset helps.
Replied by EasyIoT on topic ESP8266 SMD version RST pin ?
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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9 years 9 months ago - 9 years 9 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 ?
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 ?
Last edit: 9 years 9 months ago by cdj.
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9 years 9 months ago #569
by EasyIoT
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).
Replied by EasyIoT on topic ESP8266 SMD version RST pin ?
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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