Android + softap + GET request (no response)

[zoutepopcorn]

When connecting from a android device to the ESP8266, sometimes a get request is not responing. Especially when it connect the first time. I have to forget the network and reconnect again.

It is the same issue is also in the older original SDK and was fixed in 1.1.1. See:
http://www.esp8266.com/viewtopic.php?f=6&t=3422&hilit=softap+arduino

They have a fix for older firmware, by putting this before main():
void user_rf_pre_init(void)
{
system_phy_set_rfoption(2);
}

I'm new to the Arduino esp8266, can anybody tell me howto debug / implement this?

Note: When my softAp is on, my Android don't get response when requesting 192.168.4.1. But on my macbook I can!

[Links2004]

the user_rf_pre_init function is existing here:

Arduino/hardware/esp8266com/esp8266/cores/esp8266/core_esp8266_phy.c

Line 243 in ea302aa

void user_rf_pre_init() {

you can do a locale change.

the files can normally find on the pc here:

Windows: C:\Users\[username]\AppData\Roaming\Arduino15\packages\esp8266\hardware
Linux: /home/[username]/.arduino15/packages/esp8266/hardware

but i think you have a power supply problem.

system_phy_set_rfoption(2); from doku:

[zoutepopcorn]

Thank you. Now I have to find a way to get it in the code..

I dont think its a power supply issue. I have tried it on esp8266 with good power supply. Also at nodemcu with usb power and my ipad charger... The problem is only on android, with the softap

[zoutepopcorn]

Update:
When I restarted the phone it was still not working... :(. I had to forget the network and reconnect before the Get response on 192.168.4.1 was working...

---

Links2004, thanks so much.

I edit the file: core_esp8266_main.cpp

void user_init(void) {
    system_phy_set_rfoption(2);
    ...... 
}

Now the get request get a response the first time. It's a perfect solution for me. But I do think it has to be fixed in the firmware. Softap + Android with GET request is unstable in the release 1.6.5-804-g2d340c7 I tested..

With my program skills I don't know howto find a clean fix for the firmware.... Maybe some other people with Android devices can test it.

I was on S5 (android 4.4) and Moto G (android 5.0.2).