WIPY OEM antenna EXT or INT?

[thibault]

Hello, i'm using a wipy oem, i'm in face of a problem. The wipy have a thread who act as a webserver, and sometimes (i have actually not find the condition) the wifi signal is lost between html page switch. I search a solution, and it's why i ask you about the antenna of wipy oem. In the source code i use this:
antenna=WLAN.INT_ANT but if i use WLAN.EXT_ANT i have no difference. But what's the right parameter please? EXT or INT? Thank's

[robert-hh]

@thibault The antenna selection does not matter at all, because the W01 has just one antenna port which will used in any case.

[thibault]

@robert-hh i have use my own antenna, but i have to be sure that i use the right call to the wifi:
wlan.init(mode=WLAN.AP, ssid='Test', auth=None, channel=7, antenna=WLAN.EXT_ANT) or wlan.init(mode=WLAN.AP, ssid='Test', auth=None, channel=7, antenna=WLAN.INT_ANT)? With you answer i think the twice is fine, but i don't want to make a misconfiguration :) Thank's

[robert-hh]

@thibault The W01 WiPy OEM module has no built-in antenna at all. You have always to attach your own antenna, and in that case the antenna selection does not apply.

[thibault]

Thank's robert-hh, i have try to use this configuration:

from machine import Pin
p12 = Pin("P12", Pin.OUT)
p(12)=1
wlan.init(mode=WLAN.AP, ssid='Test', auth=None, channel=7, antenna=WLAN.EXT_ANT)

and

from machine import Pin
p12 = Pin("P12", Pin.OUT)
p(12)=0
wlan.init(mode=WLAN.AP, ssid='Test', auth=None, channel=7, antenna=WLAN.INT_ANT)

But i have also the same wifi strength signal. I use the OEM wipy, wich have an internal antenna?

[robert-hh]

@thibault There is a bug in the code in that selecting the antenna port does not work for newer modules like WiPy3, LoPy4, FiPy, ...
As a work-around, set P12 as output before changing the antenna, like:

from machine import Pin
p12 = Pin("P12", Pin.OUT)

Since the antenna select more or less only switches P12, you can then (using the code above) do that also with p12(0) for internal, and p12(1) for external antenna.